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Drifting herbicides produce uncertain effects
Date:2/10/2014

llinators, such as bees, in the fields. However, the relatively small size of the research fields limited the researchers' ability to measure the effect on pollinators, according to Egan.

"That may be because pollinators are very mobile and the spatial scale of our experiment may not be big enough to show any effects," Egan said.

Farmers can cut down on herbicide drift by taking a few precautions, according to Egan. They can spray low-volatility herbicide blends, which are less likely to turn to vapors, and use a nozzle design on the sprayer that produces larger droplets that do not easily drift in the wind.

Egan also recommended that farmers follow application restrictions printed on herbicide labels and try to spray on less windy days when possible.

The tests were conducted on two farms in Pennsylvania. One field edge site was located near a forest and alfalfa field. The old field was an acre plot near Penn State's Russell E. Larson Agricultural Research farm.

Egan worked with Eric Bohnenblust, doctoral candidate in entomology; John Tooker, assistant professor of entomology and extension specialist, and David Mortensen, professor of weed and applied plant ecology, all of Penn State, and Sarah Goslee, U.S. Department of Agriculture ecologist.


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Contact: Matthew Swayne
814-865-9481
Penn State
Source:Eurekalert  

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