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Grasshoppers gobble crops, farm profits
UCCE advisors share control, abatement strategies across Northern California
That buzzing noise in Northern California is the sound of grasshoppers chewing a path of destruction through crops and pollinator-friendly plants as they hop across an expanding area.
This is the fifth year in a row that massive numbers of grasshoppers have overrun Modoc County and “probably the worst I've seen yet,” said Laura Snell, a University of California Cooperative Extension livestock and natural resource advisor in Modoc County, located in the northeastern corner of the state.
In past years, Snell has heard from farmers who have lost up to 70% of their hay crop. This year, she is hearing of grasshopper damage from farmers who grow a wider array of crops, including onions and garlic – crops that the pests eschewed in past years.
“I've had an even broader group of producers contact me about damage,” Snell said. “Our local vegetable producers are being affected, decreasing farmers market and food hub products. Bee producers are not seeing good honey yields due to grasshoppers eating huge amounts of pollinator plants.”
Modoc County isn't alone. Lassen, Sierra, Plumas, Siskiyou, Tehama, Butte, Placer and Nevada counties are being invaded by grasshoppers.
“The county ag commissioners are circulating a survey to get an idea of other counties that may be affected,” Snell said. “Things like droughts and – I suppose, fires as well – would affect grasshopper migrations.”
While scientists don't know what's causing the explosive growth of grasshopper populations, there are some contributing factors, according to Tom Getts, UC Cooperative Extension weed ecology and cropping systems advisor for Lassen, Modoc, Plumas and Sierra counties.
In the past, grasshopper outbreaks seemed to be more isolated, and the populations tended to crash after a year or two. Getts said, “For whatever reason, the population cycle does not appear to have been broken, and they continue to have high numbers.”
Grasshoppers can consume 30% to 250% of their body weight per day, according to a fact sheet about grasshoppers, co-authored by Getts. While grasshopper nymphs walk, adults can fly 15 miles or more.
Getts and UC Cooperative Extension farm advisors have been giving presentations throughout the intermountain region on grasshoppers and the various control methods.
“The difficulty to controlling them is the scale and their ability to move,” Getts said. “The insects need to be targeted at a small growth stage for the tactics to be most efficacious. Once they are adults, it doesn't matter what one grower does to control them if their neighbor doesn't do anything.”
UCCE farm advisors in multiple counties are working on abatement options.
They recommend monitoring in April–May to control grasshoppers while they are still nymphs and susceptible to insecticides. Birds, spiders, rodents and fungi also can help keep the insects in check, but years of drought have reduced the fungi.
“The population of grasshoppers in the region have increased in size, scope and density in recent years,” said Rob Wilson, a UC Cooperative Extension agronomy and pest management advisor and director of the Intermountain Research and Extension Center in Tulelake.
The massive growth and spread of the pests is a problem because 30 pounds of grasshoppers can eat as much forage as a 600-pound cow can eat per day, he explained.
Part of the challenge of controlling grasshoppers is their changing behavior. In the past, grasshoppers would go away after a couple of years, now they persist. They used to thrive in dry fields, but last year, grasshoppers migrated 10 to 20 miles into irrigated fields, Wilson said.
Wilson, who has been monitoring grasshoppers near Tule Lake since early April, said that In some fields, there were 20 to 30 nymphs per square yard. More than eight nymphs per square yard can cause economic damage.
As if the grasshoppers themselves weren't enough of a nuisance, they attract other pests, including blister beetles.
“As the grasshopper population increases, you are bound to see an increase in all of the species that eat them over time,” Getts said. “Blister beetles cause terrible blisters when they get on your skin, hence the name, but they can also be problematic for livestock if they contaminate bales of hay.”
Getts recommends that growers take steps to prevent grasshopper populations from building over successive years. Growers should coordinate with neighboring growers to treat their fields due to the limited longevity and efficacy of treatments on individual fields.
[Editor's note: The sentence comparing the appetite of grasshoppers to that of cows was revised to clarify that grasshoppers aren't eating cows.]
Electric tractors reduce carbon emissions at UC ANR research and extension centers
Zero-emission tractors perform many tasks of diesel tractors, without noise or exhaust
The University of California, a national leader in sustainability, has pledged to become carbon neutral by 2025. To reduce its reliance on fossil fuels, UC Agriculture and Natural Resources has replaced several of its diesel-powered tractors with electric tractors at its research and extension centers.
Seven of the nine UC research and extension centers – Intermountain located in Siskiyou County, Hopland in Mendocino County, Kearney and West Side in Fresno County, Lindcove in Tulare County, Desert in Imperial County and Hansen in Ventura County – started using the Solectrac e25 in July. The researchers plan to share what they learn from using the electric tractors.
“Charging is easy, we are using a standard 110V connection, no charging station needed,” said John Bailey, director of the University of California Hopland Research and Extension Center. “For faster charging, you can use a 220V connection – again, no charging station needed, just a regular receptacle – but we haven't gone there yet.”
The electric tractor runs for about five hours, depending on the type of use and the speed, on a charge.
“We will use the electric tractor to mix the soil for planting trees in the greenhouse,” said Ashraf El-kereamy, director of UC Lindcove Research and Extension Center in Exeter, which focuses on citrus research. “Also, for pulling the trailer with the fruit bins during harvest, it will be good as it does not emit any gases.”
The electric tractor is being used to move materials in the loader at UC Hopland REC. “It has worked well for this, functioning similarly to a standard diesel tractor,” said Bailey.
“We have also used it to clean our sheep barn, scraping the pens to get ready for lambing season,” Bailey said. “This involves pushing or dragging straw bedding and manure. The tractor functions well in tight spaces due to its compact size.”
Bailey learned one downside is that the front end is a little too light, making it difficult to generate enough downward pressure with the loader to effectively scrape the floor without reducing the front wheel traction.
“We are planning to add some weight to the front, a standard practice with tractors to increase traction. The tractor has the mounting to enable this so it should not be a big deal,” Bailey said. “Our operators really appreciate the lack of noise and exhaust, especially when working in the barn or in tight spaces.”
The small electric tractor is also being used in tight places at the UC Intermountain Research and Extension Center in Tulelake.
“The tractor that we obtained from the company is too small for the majority of our farm needs,” said Rob Wilson, Intermountain REC director. “We purchased a small box scraper and rototiller for the tractor and we are using it around our facility grounds. We also use it out in the field in tight spaces that are too small for our larger tractors to operate.”
“The tractor is quiet, powerful for its size and operates very similar to the diesel-powered tractors with regard to the controls, hydraulics and three-point assembly. The tractor also has a lot of torque and speed.”
Annemiek Schilder, director of UC Hansen Agricultural REC, added, “I think another advantage is that the tractors can go very slowly, which is helpful for some uses such as harvesting.”
The researchers will continue to evaluate the electric tractors throughout the year.
“Our main usage will come in the spring, mowing around our headquarters and on roadsides,” Bailey said. “We are purchasing a 4-foot flail mower that can mount to the rear PTO, but won't really put it into use until April.” The power take-off, or PTO, is the shaft that transfers power from the tractor to the attachment.
Other benefits of electric tractors include no engine oil to change and no diesel fuel.
“If the farmer already has solar, they will see close to zero fuel charges,” Bailey added. “Even without solar, their fuel costs should be reduced depending on local electrical cost. Also, the engine only has one moving part compared to dozens in a diesel tractor so maintenance costs should be reduced significantly, something that is proving true in electric cars.”
The Solectrac e25 tractors each cost $27,999 and the optional loader was about $4,000.
The California Air Resources Board is offering incentives to buy zero-emission equipment through its Funding Agricultural Replacement Measures for Emission Reductions Program. FARMER provides funding through local air districts for agricultural harvesting equipment, heavy-duty trucks, agricultural pump engines, tractors and other equipment used in agricultural operations.
Farming Tips for Enduring Historic Drought
It has been heart breaking to seeing wheat and alfalfa fields dry up the last few weeks. The recent hot temperatures caused many fields to wither, while placing greater irrigation needs on the few crops being irrigated with well water. It's the driest year I have experienced in my...
NOXIOUS WEED ALERT - PERENNIAL PEPPERWEED/TALL WHITETOP
Does this weed look familiar? Perennial pepperweed (Lepidium latifolium) also known as tall whitetop is a root-creeping perennial weed. It is commonly found along roadsides, ditches, and drains. It is also a big problem in pastures, non-cropland, and even cropland that is not tilled on a...
Perennial Pepperweed or Tall Whitetop
Siskiyou County Board of Supervisors gives 4-H a vote of confidence
Not only did the Siskiyou County Board of Supervisors approve a $10,000 allocation to the local 4-H program, commissioners spoke warmly about the youth development program, reported Bill Choy in the Mt. Shasta News.
“Without 4-H I don't think my kids would have been as successful,” said commissioner Ray Haupt. He said he has seen the positive benefits of 4-H for kids and teens countless times and added that the program provides invaluable leadership skills to the youth in the community.
UC Cooperative Extension advisor Rob Wilson addressed the board to request the funding support. He said state funds have not kept up with the cost of running the program.
"We're having more difficulty covering that funding gap," Wilson said.
He added that the program is always looking for help and donations and encouraged the community to support them. For more information go to http://cesiskiyou.ucanr.edu/4-H_Program/.
Read more about the Siskiyou Pet Pals 4-H program.
