If irrigation is applied to areas treated with 6800(a)
pesticides within 6 months of the pesticide application,
and present irrigation practices do not comply with DPR
Leaching GWPA requirements, it may be possible
to adjust the irrigation practices to achieve compliance
so that regulated pesticides can be used.
Additional benefits of adjusting irrigation practices
may also include increased profitability resulting from
matching all inputs (water, pesticides, fertilizers etc.)
more closely to the actual crop requirements, reduced
energy costs. For example, reducing the amount of applied
water can result in more efficient use of fertilizers
and pesticides, thereby lowering the cost of these inputs.
Click on the following link to see an example. http://www.cdpr.ca.gov/docs/empm/pubs/ehapref/simazine_pub.pdf
Identifying reasons for Over-Irrigation
In order to identify adjustments to irrigation practices,
there is a need to analyze present practices to identify
the reasons for non-compliance and to decide where beneficial
changes can be made. The reasons for non-compliance may
be due to:
Management
Limitations: resulting from the present arrangement
for managing the irrigation such as the timing or duration
of irrigation events.
and/or
Physical
Limitations: resulting from the physical
features of the present irrigation method such as the
length of the fields or the flow rate of the applied water.
For each irrigation event during
a 6 month period following application of a DPR GWPA Regulated
pesticide, the Net Irrigatin Application should be no
more than 133% of the Net Irrigation Requirement.
