53. Determine Your Pesticide's Potential For Runoff |
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Pesticides can make their way to lakes, rivers, and streams in
two basic ways. They can hitch a ride with eroding soil by "adsorbing,"
or attaching, to soil particles.
Or, they can dissolve in runoff water and move with the water as
it flows across the surface. That is why the USDA Agricultural Research
Service and the USDA Natural Resources Conservation Service have
given pesticides two different runoff ratings.
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The
pesticide runoff potential for adsorption loss indicates which pesticides
are more likely to attach to soil particles and move with eroding
soil. The runoff potential for solution loss indicates which pesticides
are more likely to dissolve in and move with the runoff solution. |
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By
contacting the NRCS, you can find out whether your pesticides have
a large, medium, or small potential for adsorption-loss runoff, as
well as solution-loss runoff. |
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It
is possible to improve the pesticide runoff rating by either foliar-applying,
incorporating, or banding the pesticide over the row. For instance,
if your insecticide has a medium runoff rating, but you foliar-apply
it, assume that its rating is actually small. |
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