Agriculture Reference
In-Depth Information
filling or draining and by rinsing or discarding used containers along or in wa-
terways.
Typical pesticide labeling statements that alert you to these concerns in-
clude:
Phytotoxic. Do not spray on plants.
Do not apply this product or allow it to drift to blooming crops or
weeds if bees are visiting the treatment area.
Extremely toxic to aquatic organisms. Do not contaminate water by
cleaning of equipment or disposal of wastes.
This product is toxic to fish, shrimp, crab, birds, and other wildlife.
Keep out of lakes, streams, ponds, tidal marshes, and estuaries.
Shrimp and crab may be killed at application rates. Do not apply
where these are important resources.
2. Harmful Effects from Residues
A residue is the part of a pesticide that remains in the environment for a
period of time following application or a spill. Pesticides usually break down
into harmless components after they are released into an environment. The
breakdown time ranges from less than a day to several years. The rate of pes-
ticide breakdown depends primarily on the chemical structure of the pesticide
active ingredient. The rate of pesticide breakdown also may be affected by
environmental conditions at the release site, such as:
surface type, chemical composition, and pH
surface moisture
presence of microorganisms
temperature
exposure to direct sunlight.
Persistent pesticides leave residues that stay in the environment without
breaking down for long periods of time. These pesticides are sometimes desir-
able, because they provide longterm pest control and may reduce the need for
repeated applications. However, some persistent pesticides that are applied to
or spilled on soil, plants, lumber, and other surfaces or into water can later
cause harm to sensitive plants or animals, including humans, that contact
them. Clues on pesticide labeling that a particular pesticide product is likely
to be persistent include:
Can remain in the soil for 34 months or more and cause injury to cer-
tain crops other than those listed as acceptable on the label.
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