Em4885 irrigation management practices to protect ground water

4 CHAPTER
IP 4.01.03 - Schedule Applications for Maximum Effectiveness
Objective
Ensure that chemicals are applied at the right time for maximum effectiveness.
Description
Make sure that pest populations are at an economic threshold before applying chemicals.
Try to match the spray to emerging generations.
Use scientifically proven scouting techniques and ensure that the data is used with locally
calibrated population dynamics models. Also, note Practice 4.02.03 for avoiding periods
just before irrigations.
IP 4.01.04 - Maintain Records of All Chemicals Bought and Applied as well as
Scouts and Individual Applications (dates, material, method, crop, results)
Objective
General improvements in the crop protection program over time.
Description
Records of the crop protection program can be used in conjunction with small-scale
on-farm field trials to fine-tune the program. These may or may not reduce the total
amount of chemical applied but may improve the timing and efficiency of use while
reducing the amount lost to leaching and surface runoff. Records should also include
the amount of chemical in storage and number and type of containers for disposal.
The Washington Pesticide Application Act addresses pesticide use in the state. It requires
that specific information be recorded regarding application of pesticides to more than one
acre of land.
IP 4.01.05 - Read and Follow All Label Instructions
Objective
Legal use of chemical as intended.
Description
A chemical’s label defines how that chemical can be used and on what crops. It contains
such information as the maximum dosage, concentration, and frequency of use, the
targeted pest, weed, or disease, and what other chemicals or fertilizers the chemical
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