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Herbicides

Opinion: Timber, environmental interests’ collaborative problem-solving deserves Oregonians’ support

February 8, 2021 By OFIC

By: Arnie Roblan and Caddy McKeown | The Oregonian | Feb. 7, 2021

Roblan, a Democrat from Coos Bay, represented District 5 in the Oregon Senate from 2013 until last month. McKeown, a Democrat from Coos Bay, represented District 9 in the Oregon House from 2013 until last month.

This opinion originally appeared in The Oregonian.

Oregonians are well-versed in the story of our state’s decades-old battle between the timber industry and environmentalists. Books have been written about it. University seminars are given on it. As longtime legislators, we had front-row seats to years of tense hearings with heated testimony on controversial forest policy bills. These issues are extremely emotional and divisive, sometimes fueling opposition in the form of tree sitting, massive rallies on the Capitol steps and other public protests.

We are encouraged and optimistic that those days are behind us. As Henry Ford once said, “Coming together is a beginning, staying together is progress, and working together is success.”

Last February, Oregon Gov. Kate Brown announced a groundbreaking agreement between 13 timber and forest products entities and 13 environmental organizations. Known as the Private Forest Accord, this collaborative environmental effort is moving forward in lieu of the divisive ballot measures, litigation and contentiouslegislation of the past. The signatories of the accord pledged to work together on proactive legislation and explore if common ground exists to support recommended changes to forest practices that have long divided them.

Even during a global pandemic and a horrific wildfire season, the group has stuck together and made significant progress. During a special session in June, the Legislature passed Senate Bill 1602 with nearly unanimous bipartisan support in both legislative chambers, and the bill was signed into law by the governor in July. SB 1602, which was crafted with the help of timber and environmental leaders, codified the historic agreement and created a set of significant reforms to the Forest Practices Act. These new laws restrict helicopter applications of pesticides on forestland with new protections for homes, schools and drinking water, and created a new, first-in-the-nation real-time neighbor notification and reporting requirement. We are proud to have championed that bill. All Oregonians should be proud of this accomplishment and the admirable spirit of collaboration that made it possible.

Now is the time to build on that success. Last month Gov. Brown announced the appointment of experienced mediator Peter Koehler, Jr., to facilitate further dialogue about new protections for sensitive aquatic species on private forestland, which could be formalized in a statewide Habitat Conservation Plan. Negotiations began in earnest this month, and we have high hopes for the outcome.

These negotiations over the next few months will not be easy, but the success of SB 1602 demonstrates the promise of a thoughtful, collaborative process for change that Oregonians deserve, rather than the divisive battles of the past.

Importantly, the Legislature needs to support this momentous opportunity and give the signatories the space necessary to grow and carry out what was set in motion last February. It is time to hold off on legislation that fuels a polarizing debate over Oregon forest policy, and instead support the arena for collaborative compromise. Legislative leaders from both parties should endorse this effort and help ensure its success by tabling traditionally polarizing issues and debates.

While we do believe it is imperative the Legislature address the recent megafires in our forests that have devastated our communities, solutions should focus on federal lands and can be discussed without disrupting the Private Forest Accord. In the past decade, 86% of the forested acres that have burned in Oregon were on federal lands.

The opportunity for a better way and a new day for Oregon forest policy is before us. A new paradigm—something we’ve never seen before in our careers as legislators—is taking shape, and it deserves every chance to succeed.

The Legislature and all Oregonians should join us in embracing this new collaborative approach.

Filed Under: New, News Tagged With: Herbicides, Tax, Water

Timber compromise bill triggers negotiations, spray restrictions

July 1, 2020 By OFIC

By Mateusz Perkowski | Capital Press | July 1, 2020

**This story originally appeared in the Capital Press, see that story here. 

Potential changes to Oregon’s forestry laws will be negotiated over the next 18 months now that lawmakers have passed a compromise bill between timber and environmental interests.

However, stricter notification requirements for helicopter spray operations and enhanced no-spray buffers around schools and streams are set to become effective as early as next year, even before additional revisions are hammered out.

Timber companies and environmental groups struck a deal earlier this year to pass the bill rather than try to persuade voters to pass competing ballot initiatives about forestry regulations. The timber industry feared the environmental proposals would have reduced logging on private lands by 25% by acreage.

However, the previous compromise bill died earlier this year when Republican lawmakers walked out of the Legislature rather than vote on controversial climate legislation that was strongly opposed by natural resource industries.

During the special session that concluded on June 26, though, the compromise was revived as Senate Bill 1602 and passed the House and Senate with overwhelming majorities.

Under the legislation, a landowner or timber operator must provide notification of a planned helicopter pesticide operation the day before spraying begins, down from about two weeks under current law.

Interested parties will learn of the spray operations through the Oregon Department of Forestry’s forest activity electronic reporting and notification system, known as FERNS.

Aside from this change, the operator must also initially provide the agency with a shorter 90-day window for when the treatment might occur, down from the current year, and complete additional post-application reporting requirements.

Spray operations in the forest are prone to being called off and rescheduled because they can only occur in narrow wind, temperature and humidity conditions, said Richard Zabel, executive director of the Western Forestry and Conservation Association.

“When you can’t spray, you’re essentially starting all over again,” Zabel said.

Similar notification requirements were opposed during past legislative sessions by the timber industry, which criticized them as being impractical and causing unnecessary anxiety among neighboring landowners.

Previously, technology didn’t exist that could efficiently provide such remote notification, said Greg Miller, representative of the timber companies involved in the compromise.

In 2020, “we found a way to get to yes” in light of technological advancements that “while still untested” are ready to be implemented at the Oregon Department of Forestry “and we hope that the notification reduces safety concerns for all involved,” Miller said in an email.

The new notification requirements would become effective on July 1, 2021 unless the Department of Forestry determines its system lacks the capacity at that point, in which case the agency would have another year to implement it.

New no-spray buffer regulations under SB 1602 will become effective even earlier, on Jan. 1, 2021.

Buffers around certain streams that are currently as narrow as 20 feet will increase to 75 to 100 feet, depending on stream type, while the buffers around schools and homes will increase from 60 to 300 feet under the bill.

While Oregon’s commercial forests don’t have many buildings compared to other land uses, the law also prohibits spraying within 300 feet of points of diversion for drinking water, which will probably be more consequential, said Mike Cloughesy, director of forestry for the Oregon Forest Resources Institute.

“There are a lot more water take-outs than there there are schools,” Cloughesy said.

Though much of SB 1602 imposes conditions on forestry operations, it also contains penalties for interfering with aerial herbicide spraying, with penalties of up to $5,000 for the “use of force, violence or action that impedes a pesticide application by helicopter to forestland.”

Interference doesn’t include “photography, videotaping, audiotaping or other creation of an electronic record” by someone on public property or private property where they’re allowed.

Filed Under: News Tagged With: Herbicides, Water

Governor Kate Brown Announces Continued Agreement on Science-Based Forest Management

March 31, 2020 By OFIC

By Governor Kate Brow’s Office | March 31, 2020

**This press release originally appeared on the Governor’s website. See that release here.

Timber and environmental groups reinforce their commitment to February pact brokered by Governor Brown

Salem, OR—Governor Kate Brown today issued the following statement on receiving a reaffirmation of commitment from forest industry and environmental groups to work together on a science-informed policy development process related to forest practice laws and regulations.

In February, the signatories to the original memorandum of understanding agreed to drive a process to update the state’s timber practices balancing habitat and working in the woods, with the mutual goals of meeting the standards of endorsement from federal wildlife agencies; passing legislation on aerial spraying of pesticides to enhance spray buffer zones and notification practices; expanding stream buffers for salmon, steelhead, and bull trout streams; and sustaining Oregon’s critical forest products industries. Both sides agreed to drop all forestry-related initiative petitions and related litigation after passage of updated legislation addressing the areas of contention.

“Two short months ago, with the goal of creating a better future for Oregon, the state’s forest industry and major environmental groups were able to find common ground in a historic collaboration,” said Governor Brown. “Since then, all of our daily lives have changed dramatically, as our state has been dealing with the spread of COVID-19. Right now, my top priority is the safety and health of Oregonians. I am doing everything in my power to slow the spread of the virus and protect our front-line workers to keep people safe.

“Now we’re going to need to work together more than ever. I am pleased to have the partnership of industry and advocates to achieve the original goals of the memorandum of understanding, including legislation, as soon as circumstances allow for this very important work to resume.

“I, too, remain committed to our collective goals and to the long-term health of our state. Oregonians want healthy forests and fish, a vibrant forest sector, and prosperous rural communities, and I appreciate the continued collaboration to make this happen.”

Filed Under: News Tagged With: Herbicides, Water

Environmentalists And Timber Industry Reach Agreement On Forests, Avoiding Oregon Ballot Fights

February 10, 2020 By OFIC

By Dirk VanderHart and Tony Schick | OPB | Feb 10, 2020

** This story originally appeared on OPB.

What has looked for months like an epic looming battle over Oregon’s forests has been called off under a new deal reached by environmental groups and logging industry players.

In an agreement announced Monday, conservation-minded groups have agreed to abandon a series of ballot measures aimed at stepped-up protections for forest waters, and at limiting aerial spraying of pesticides, among other things.

At the same time, timber industry players are planning to ditch their own ballot measures – filed in response to the environmental proposals – that would require landowners be compensated when state regulations curbed their ability to log, and alter the makeup of a state board that controls forest management policies.

The deal could result in the most significant changes to Oregon’s forest practices since the adoption of the Northwest Forest Plan in the 1990s.

“Healthy forests and a vibrant forestry industry are not mutually exclusive, and Oregonians need both for prosperous and sustainable communities,” Oregon Gov. Kate Brown said.

“The Cooperating Parties acknowledge that they have an incentive to reach a compromise on historically difficult issues without risking adverse outcomes in an election,” reads a memorandum of understanding signed by 26 groups – 13 on either side of the issue. The list includes environmental activists such as Oregon Wild, the Audubon Society of Portland, and the Oregon League of Conservation Voters, along with large timber outfits such as Stimson Lumber, Roseburg Forest Products and Weyerhaeuser.

Speaking on behalf of the forest industry coalition, Greg Miller, a former Weyerhaeuser spokesman, said the agreement would increase environmental benefits and provide certainty for the business community.

“This is the time, this is the historic moment where we can drive benefit for all Oregonians,” Miller said.

Another company signing the deal, Roseburg Forest Products, stood by its current practices and said the agreement was about setting aside differences.

“While we are confident in our current science-based forest practices, we recognize the need for a direct conversation about forest management,” spokeswoman Rebecca Taylor said. “The cooperative agreement announced today charts a path to provide greater assurances for a strong and vibrant industry and a healthy environment.”

Bob Van Dyk of the Wild Salmon Center, speaking on behalf of the environmental coalition, said the new agreement could bring Oregon up to date with environmental protections already adopted by its neighbors. Habitat conservation plans are already in place throughout forests, with the same ecology and many of the same landowners, throughout Washington state.

Oregon Wild Executive Director Sean Stevens, also a signer of the agreement, said that depends on the progress made over the next two years.

“This agreement is only a first step in a longer journey,” Stevens said. “Conservation of Oregon’s forests, and communities that live around them and rely upon them, is not guaranteed at the end of this process.”THANKS TO OUR SPONSOR:Become a Sponsor

Rather than engaging in an expensive and uncertain war to win over voters, both sides have agreed to participate in a mediated process of up to 18 months, according to the memo. The goal: to arrive at a federally approved “habitat conservation plan” for how private forests should be managed with an eye toward ensuring protection of vulnerable species and water resources.

In the meantime, timber industry players have agreed to support a bill in this year’s legislative session that would increase notification requirements for aerial pesticide spraying on private timber land, and increase buffers for such spraying around schools, homes and streams.

Aerial spraying has been a controversial practice for decades. It is a linchpin of industrial-scale forestry, as many timber owners consider spraying in the early years after a clear cut the most effective way to kill unwanted plants and regenerate a new crop of Douglas fir seedlings. It is also the subject of complaints from neighbors and environmental groups about potential drift or runoff into water. Multiple communities in Oregon’s coast range have claimed they were sickened by wayward pesticides meant to kill unwanted plants on private tree plantations.

The timber industry successfully fought additional no-spray buffers and requirements for notifying neighbors of aerial spraying during previous legislative sessions, but the industry also had indications those issues would be more vulnerable on the ballot than in the hands of lawmakers.

Voters in Lincoln County approved a ban on aerial spraying in 2016, which was later overturned in court. That was despite industry groups and other opponents of the ban outspending supporters $475,000 to $21,600.

Beyond that, the industry’s own polling also has shown that voters in coastal counties have widespread support for logging but are nonetheless “very susceptible to the idea of banning aerial pesticides,” according to a memo obtained by OPB and The Oregonian/Oregonlive through Oregon’s public records law.

The 2018 memo from the Oregon Forest & Industries Council, which represents large timber companies and many of the signatories to today’s agreement, outlined poll results from 500 likely voters in coastal Oregon.

The polling showed that, when given context about why companies use pesticides, between 55-57% of likely voters polled thought aerial spraying was “unnecessary” or “bad” and risked the spread of harmful chemicals through air and water. About a third of those polled considered the practice “necessary” or “good” for growing mature forests and supporting an important industry.

“Underlining the difficulty of this conversation,” the memo states, “voters who have immediate family employed in the timber industry or are employed themselves oppose aerial pesticides at the same rate as voters overall.”

The newly-announced deal also includes restrictions on stream-side logging in southern Oregon’s Siskiyou region, rules meant to protect fish. The region was exempted from those logging buffers, which are in place throughout the rest of the state’s coastal forests.

The mutual disarmament avoids what looked like a potentially bruising ballot fight later this year. And according to some players in the agreement, it creates a path by which Oregon could push forward protective policies long sought by environmental groups, while offering more certainty to property owners about how they can manage their land.

The agreement, brokered by the governor’s office, came together in four meetings held over the course of just two weeks, according to one participant.

While the deal calls for both sides to largely drop ballot proposals, it explicitly allows a legal fight over three of those proposals to continue.

The initiative petitions, filed with backing from the group Oregon Wild, all sought to step up protections against spraying and logging near forest waters and other sensitive areas. But all three were rejected by Secretary of State Bev Clarno, who found they were unconstitutionally overbroad.

Petitioners have challenged that opinion, and the case is currently before the Oregon Court of Appeals. The memorandum indicates the group intends to see the case “to final resolution.”

Filed Under: News Tagged With: Herbicides, Water

Timber companies, environmentalists sign ‘historic’ pact on Oregon forest management

February 10, 2020 By OFIC

By Associated Press | Feb 10, 2020

**This story originally appeared on KVAL.

SALEM, Ore. (AP) — Environmental groups and timber companies in Oregon, which have clashed for decades, on Monday unveiled a road map for overhauling forest practice regulations, a step that Gov. Kate Brown called “historic.”

The agreement came after the two sides quietly held meetings, facilitated by the governor’s office, in Salem and Portland over the last month to try to find common ground, instead of filing competing initiative petitions and lawsuits.

“I walked in on the first meeting, and I knew folks were serious when the timber industry folks had their shirt sleeves rolled up and enviros were in suits and ties,” Brown said at a news conference.Gov. Brown announces ‘historic’ agreement on Oregon forest management

The meetings resulted in leaders of around a dozen environmental groups, including Oregon Wild, the Audubon Society of Portland and Cascadia Wildlands, and of a dozen timber companies, including Weyerhaeuser, one of the largest forest products companies in the world, and Lone Rock of Roseburg, Oregon, signing a memorandum of understanding.

Oregon Strategy MOU (Final Executed) by Sinclair Broadcast Group – Eugene on Scribd

Oregon leads the nation in wood-products manufacturing, according to industry experts, even though environmental groups and the timber industry have been backing rival initiative petitions that seek to put measures on the ballot. They have also backed rival legislation and filed lawsuits.

Under the new agreement, both sides would complete a stand-down from pursuing changes through the initiative process, related legal actions, and legislative and regulatory proceedings.

The agreement represents a departure from 20 years of tension, said Bob Van Dyk, Oregon and California policy director for the Wild Salmon Center. He appeared with Brown at the news conference.Bob Van Dyk from environmental coalition

That animosity “results in a lack of trust, gridlock on forest policy and a growing public demand for broader reform,” Van Dyk said. “Today we’re starting a new approach … It’s a path of collaboration toward stronger conservation measures and more certainty for the timber industry.”

Greg Miller, a long-time timber industry executive and representative of the coalition of forest companies, told reporters he hopes the memorandum of understanding “sets Oregon up for the most comprehensive, forward-thinking forest policy in the nation.”

Both sides underscored that while it is a big moment, it is only a first step.

“Conservation of Oregon’s forests, and communities that live around them and rely upon them, is not guaranteed at the end of this process. It will require significant work over the next two years to modernize forest rules,” said Sean Stevens, executive director of Oregon Wild.

Under the agreement, both sides would support immediate legislation to establish helicopter pesticide application buffers, or no-direct application zones, around inhabited dwellings and schools and around streams.

Nik Blosser, Brown’s chief of staff, described in a telephone interview how the two sides came together. The seed was planted when a group of timber company CEOs met with Brown in January and asked her if she could broker a deal on all the litigation and initiative petitions.

Blosser then contacted the environmentalists, thinking that this was a long-shot effort.

“I called them and said, ‘Are you interested in sitting down and having this conversation?’ And they said, ‘Well, we’re not sure how serious they really are. And I said, ‘Well, I think they’re pretty serious, so why don’t we do one meeting and give it a try?,” Blosser recalled.

There wound up being four meetings, with five people representing each side, Blosser said. Everyone was fully engaged.

“Nobody looked at their phones, which is kind of remarkable in a meeting nowadays. Everyone was listening and everyone was acknowledging the other person talking and that what they said was sincere,” Blosser said.

The memorandum they agreed to sets up a process for overhauling the Oregon Forest Practices Act — a set of laws enacted in 1971 that made Oregon the first state to implement a comprehensive set of laws governing forest practices. It contains provisions for activities such as how timber harvests happen on private forest lands, providing riparian buffers along rivers and streams and the replanting of trees.

Both sides agreed the plan needs to be science-based, though debate is expected on what the science says, Blosser said. The aim is to arrive at a habitat conservation plan, or HCP — basically a certification from federal agencies that says the plan is consistent with the Endangered Species Act and the Clean Water Act and is good for both species recovery while allowing maximum timber harvests agreed to in the HCP, Blosser said.

The memorandum calls for the final plan to be developed so that legislation implementing the agreements will be enacted on or before the February 2022 Legislative session.

“This agreement proves that we can build a better future for Oregonians if we work together with a willingness to compromise,” Brown said. “Healthy forests and a vibrant forestry industry are not mutually exclusive.”

A collaborative process called Forests & Fish in Washington State led to a similar outcome, with over 60,000 stream miles and 9.3 million acres of Washington forests being protected by an HCP, according to Brown’s office.

Filed Under: News Tagged With: Herbicides, Water

Governor Kate Brown Brokers Unprecedented Agreement Between Timber and Environmental Groups

February 10, 2020 By OFIC

By Governor Kate Brow’s Office | Feb 10, 2020

**This press release originally appeared on the Governor’s website. See that release here.

The memorandum of understanding will chart a new path for science-based forest management in Oregon

Salem, OR—Governor Kate Brown today announced a historic agreement between representatives from the state’s forest industry and major environmental groups to chart a collaborative course toward meaningful, science-based forest management in Oregon. The agreement takes a significant step toward a new era of cooperation, leaving behind the conflicts of the past.

“This pact proves that when we work together with a willingness to compromise, we can create a better future in Oregon,” said Governor Brown. “Oregonians want healthy forests and fish, a vibrant forest sector, and prosperous rural communities. These are not mutually exclusive goals. The conversations that brought forth this agreement, coupled with sound science, will bring certainty for everyone involved while protecting Oregon’s environment and endangered species.”

The signed memorandum of understanding (MOU) addresses three key issues. It will:

• Drive a process for Oregon to update its timber practices: For the first time, Oregon will strive for the endorsement of federal wildlife agencies, signifying that the state’s forest practices are protective of threatened and endangered species, including Oregon’s iconic salmon. Through this process, the state will seek a Habitat Conservation Plan, allowing Oregonians to continue their long tradition of working in the woods while honoring natural habitats.

• Support passage of new legislation for the 2020 session on aerial spraying of pesticides: A state-of-the-art system will build confidence with forest neighbors, who will be eligible to receive real-time notification that aerial spraying will occur. This first of its kind system will expand protected spray buffers around drinking water, homes, and schools.

• Expand forest stream buffers in the Rogue-Siskiyou region: New legislation will also expand forest stream buffers along salmon, steelhead, and bull trout streams, aligning forest practices in the area with those of the rest of western Oregon.
With this MOU, both sides have agreed that all forestry-related initiative petitions and related litigation will be dropped after the passage of the legislation this session.

“This MOU is shared recognition of the diverse benefits Oregon’s forests provide, and the need for more meaningful dialogue around forest issues across the state,” said Greg Miller, long-time timber industry executive and representative of the coalition of forest companies. “Oregon is one of the best places in the world to grow and harvest trees sustainably; we lead the nation in wood products manufacturing, and we are proud of our record of environmental stewardship.”

“Now as we move forward into a new era of cooperation and transparency, forest policy should continue to rely on the best available science,” said Miller. “The 60,000 Oregon families who work in the forest sector — indeed all Oregonians — expect that level of rigor and thoughtfulness when it comes to forest management. With this MOU, we are hopeful that we have found a pathway forward that meets those expectations and sets Oregon up for the most comprehensive, forward-thinking forest policy in the nation.”

“Today’s agreement is a critical step toward modernizing Oregon’s forest rules,” said Bob Van Dyk, Oregon policy director at the Wild Salmon Center. “Oregonians are rightfully proud of our forests and what they provide, including some of the best salmon runs in the Lower 48 and drinking water for most of the state. It’s our collective duty to make sure that a healthy timber industry doesn’t come at the expense of fish, wildlife, and public health.”

“This agreement is a genuine show of good faith from both sides,” said Van Dyk. “There’s still much work to be done for our communities and the healthy environment on which we all depend. There is a long road ahead, but this agreement is a big first step in the right direction.”

The complete MOU can be viewed here.

Filed Under: News Tagged With: Herbicides, Water

Advanced Aerial Application Technology Reduces Pesticide Drift

June 30, 2016 By OFIC

More than 40 million tree seedlings are planted in Oregon’s forests each year, but growing a successful forest doesn’t start and end with planting a tree. In the same way a backyard gardener doesn’t just stick a tomato plant in the ground and come back two months later to juicy tomatoes, foresters, just like farmers, do much more to ensure that their seedlings have what they need to grow up healthy, productive and strong.

The Oregon Forest Practices Act, a set of laws that regulates activity on Oregon’s forestlands, not only dictates that landowners must replant new trees within two years of a harvest, it also requires that the young trees must be “free-to-grow” within six years of harvest. That means foresters have to guarantee the new trees are vigorous, well-distributed, and ready to grow successfully into a young forest.

The first few years of weed-free growth are the most important. Wilbur-Ellis demonstrated the difference with an 18-year trial of two sites, one planted with trees after a single treatment of herbicides versus one planted without treatment. After just two years, the difference is visible above (tree from treated plot on right.) After 18 years, the treated site had trees that were 27 percent taller and 39 percent greater in diameter.

The first few years of weed-free growth are the most important. Wilbur-Ellis demonstrated the difference with an 18-year trial of two sites, one planted with trees after a single treatment of herbicide and one planted without treatment. After just two years, the difference is visible above (tree from treated plot on right.) After 18 years, the treated site had trees that were 27 percent taller and 39 percent greater in diameter.

Small tree seedlings need light, water and nutrients to survive and grow. The biggest threat to the survival of baby trees is faster-growing weeds that steal these resources away from the tree. One way foresters give newly planted seedlings a jump on weed pressure is to apply herbicides to the site before the seedlings are put in the ground. One or two applications of herbicides is all that is needed to hold back the weeds long enough for a new forest to establish.  Following establishment, the new forest won’t need further herbicide treatments for an entire generational rotation of 40-60 years.

“Nature abhors a vacuum,” says Bruce Alber, certified forester and sales representative for Wilbur-Ellis Company. “After a harvest, seeds from non-native invasive species like Scotch broom, Japanese knotweed, and blackberries get blown in or are carried in by animals.” Those, combined with grasses and other brush, grow quickly and develop vigorous root systems that out-compete and choke out conifer species. “Seedlings need at least 20 percent or less ground cover around them to grow and succeed,” Alber said, “The first few years of weed-free growth are the most important to their survival.” After the first few years, seedlings are tall enough to shade out competing weeds.

Western Helicopter applying herbicides on unit of land owned by Starker Forests.

Western Helicopter applying herbicides on unit of land owned by Starker Forests.

While sometimes it makes sense to apply herbicides with a hand crew on the ground, application by aircraft (usually from a helicopter) provides a number of advantages.  “Aerial application is extremely efficient in treating a large number of acres in the limited time available when the weeds and brush are susceptible and the crop trees won’t be damaged,” Alber said.  “This window of opportunity can be a matter of a week or ten days for a specific unit and weed species.  For a treatment project of 1500 acres, it might take a helicopter crew four to ten days, compared to about 300 man days for a hand crew.”

Western Helicopter president Rick Krohn, left, with Director of Maintenance Karson Branham. Western Helicopter owns eight helicopters (ranging in cost from $300,000 to $1.2 million) that costs about $1,200 per hour to fly. Branham is in charge of monitoring and repairing the multitude of parts and pieces of the aircraft that are regulated by the FAA. He estimates the helicopters take about an hour of maintenance per hour of flight.

Western Helicopter president Rick Krohn, left, with Director of Maintenance Karson Branham. Western Helicopter owns eight helicopters (ranging in cost from $300,000 to $1.2 million) that costs about $1,200 per hour to fly. Branham is in charge of monitoring and repairing the multitude of parts and pieces of the aircraft that are regulated by the FAA. He estimates the helicopters take about an hour of maintenance per hour of flight.

Rick Krohn is the president of Western Helicopter Services, which has operated in the Pacific Northwest since 1966 and is one of the only aerial application services that specializes in forestry. In addition to increased efficiency, he explained that aerial application also reduces cost, the amount of chemical used, and risk to the applicator. “There’s no way a ground crew could cover all the acres for a forestry company, so they’d suffer more tree mortality and have to re-plant more,” Krohn said. “It would cost at least three times as much. Ground applicators also tend to put on more chemical per acre and there’s much more potential for applicators to suffer physical injury just from walking through all that brush.”

Technological developments in aerial application for forestry have considerably increased application precision in the last 30 years. “When aerial application in forestry first started in the late 1960s,” Krohn said, “the technology was nowhere close to where it is today.” Both Krohn and Alber agree that the most impactful innovation for the industry has been research on spray nozzle size and angle that results in increased droplet size for the product coming out of the spray booms (the arm of the aircraft that releases the herbicide).

“A lot of people thought that we needed to have small droplets to get good control,” Alber said. “We have shown that to be untrue, so we get more precise deposition onto the target and have virtually no off-target drift.” Larger droplets are heavier and reach the target area without being blown around. “The good thing about herbicide use in forestry is you usually only need a few drops to be effective,” Krohn said.

Western Helicopter-4

Advancements in research on how nozzle size and angle mitigate drift have been real game changers for the industry. There are more than 50 different nozzles for use in aerial application.

One of the key areas of research focus for the USDA Aerial Application Tech Research Unit (AATRU) in College Station, Texas is spray drift mitigation. Using a wind tunnel to simulate real conditions, scientists have created Aerial Spray Nozzle Models that allow applicators to determine the best nozzle size, nozzle angle and droplet size to greatly reduce the amount of small, driftable droplets. “New herbicide labels are now setting the requirements for droplet sizes and usually require medium or larger droplet sizes,” Alber said. “This allows us to cut a hard line between vegetation control and no damage to vegetation, protecting buffered areas such as waterways, neighbor boundaries, and other no-spray areas.”

Mobile apps allow applicators to check nozzle size, angle and droplet size on site.

Mobile apps allow applicators to check nozzle size, angle and droplet size on site.

While on site, applicators can use a mobile app to look at how changing the parameters of the spray set up impacts droplet characteristics.  “Small changes can make a big difference,” Alber said.

A key piece of knowledge that came out of the AATRU was discovering that “flying low doesn’t always mean less drift,” said Krohn.  “Because we’re using such large droplets, it was actually found that flying ten feet or lower increases the amount of driftable droplets because the wind vortices from the wings or blades of the aircraft push the droplets further than flying at 18 feet.” Krohn explained that flying higher actually allows the droplets to mix with the air and separate for better efficacy.

Another recent improvement in aerial application is the incorporation of Global Positioning Systems for alignment and guidance from the cockpit. By keeping a mounted tablet in the pilot’s peripheral vision, the pilot can watch the spray path in real time, reducing overlap and increasing accuracy and precision. “GPS guidance systems also offer a very good record,” Krohn said. “Before GPS we were still doing a good job, but the technology gives a level of comfort – it gives a record of where and when the boom has been turned on.” The use of shorter booms also reduces the chance of droplets getting pulled upward by the vortices created by the rotor blade, and half-boom capability (literally turning half the boom off) allows for better precision around stream buffers.

https://www.youtube.com/watch?v=85xlgRehZiQ

The above video is a sped-up version of the spray path the pilot sees in real-time from a tablet in the cockpit (the actual application took 45 minutes). A sensor on the boom is triggered when the spray is switched on. Stream buffers are sprayed first with the half boom setup, the blue lines indicate when the half boom is on, while the red lines are when full boom is in use.

Krohn also noted that the introduction of new pesticides or formulations of pesticides that are more environmentally friendly and require less product to be applied has made a big impact in the industry. “Thirty or 40 years ago we used the same herbicide to treat everything,” Krohn said, “But now we can assess the weed pressure on a given site and tailor applications for specific treatments so we’re not putting on any more than needed.” Drift reduction technology products that are added to the spray mix can also be useful in some applications to further reduce the fine, driftable droplets and focus more herbicide on the intended target.

The future of aerial application promises even more innovation as technology advances. Drones and unmanned aircrafts are being tested for potential use in certain instances of pesticide application and have shown to be useful in small areas in Japanese agriculture. The technology isn’t quite there yet for commercial use in the U.S., though. “The problem with small aircraft is that they can’t carry enough spray mix to spray more than a small fraction of an acre, much less a 70-acre patch of Scotch broom,” said Alber.  They may have other uses though. “Drones or multirotor unmanned aircraft could be useful in scouting forest sites for weed density and possible weed identification,” said Alber.  “Agriculture is using them now for remote sensing on crops.”

Reducing drift is a the primary driver of innovation in aerial application for a number of reasons, only one of which is the simple fact that the cost of the chemical applied is the single most expensive part of aerial application and every drop that ends up outside the target area is money wasted.  Aerial application is a vital tool for sustainable forest management, and while foresters take tremendous care to ensure that weather conditions are right and all rules, regulations and best management practices are followed, technological advancements have revolutionized the accuracy and precision of this industry.

Filed Under: Views Tagged With: Herbicides

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