Azinphos-Methyl IRED Facts
October 31, 2001
Action and Rationale
EPA is releasing its Interim Reregistration Eligibility Decision (IRED)
for azinphos-methyl, which includes a determination to cancel, phase out,
or continue under time-limited registrations the crop uses of this pesticide.
An organophosphate insecticide first registered in 1959, azinphos-methyl
is widely used in agriculture and provides important pest control benefits
to growers of orchard fruit, nut, and other crops. However, azinphos-methyl
also poses a high degree of risk to agricultural workers, as well as significant
acute ecological risks. The Agency's actions address both the high risks
and benefits associated with current agricultural uses of azinphos-methyl.
EPA will publish a notice of availability of this IRED, which will include
a 60-day comment period.
Worker and Ecological Risk Reduction
To improve worker safety and lessen ecological risks, EPA's actions for
azinphos-methyl include:
28 crop uses will be cancelled without phaseout since
safer pest control alternatives are available
7 crop uses will be phased out over 4 years, allowing
time to shift to safer pest control alternatives; and
8 crop uses will be issued time-limited registrations
for 4 years, allowing time to develop safer pest control alternatives.
Time-Limited Registrations
The Agency has taken the approach of a time-limited registration for some
uses of azinphos-methyl because both the risk to reentry workers and the
benefits of the use on crops like apples and sweet cherries are high.
"High benefits" means that the withdrawal of azinphos-methyl
from the market would result in significant economic impacts on the fruit
industry. These effects are largely determined by the lack of alternative
methods to control pest pressure effectively and economically.
Protections for Workers
To protect agricultural workers during the phase-out and time-limited
registration periods, a variety of new and stringent precautions would
be implemented. These include longer intervals before workers may re-enter
treated areas, reducing the amount of pesticide that may be applied, limiting
the number of applications, and prohibiting most aerial applications.
EPA's Review Process
The Azinphos-methyl IRED concludes EPA's review of this individual pesticide
through the organophosphate pilot public participation process. Through
this process, EPA exchanged information on azinphos-methyl's uses, risks,
and benefits with stakeholders and the public, and obtained significant
input from interested parties. This input helped the Agency determine
whether azinphos-methyl is eligible for reregistration and meets the safety
standard set by the Food Quality Protection Act (FQPA) of 1996. A final
reregistration decision will be issued following completion of the cumulative
risk assessment for the organophosphate pesticides.
EPA previously issued decisions and risk reduction measures for azinphos-methyl after Agency risk assessments showed that the pesticide could not meet the safety standard set by the FQPA. Those earlier actions, initiated in August 1999, effectively reduced dietary risks to children and others, and began reducing worker and ecological risks.
Risk Mitigation
The following mitigation is necessary for continued use of azinphos-methyl
under the phase-out or time-limited registration:
To Reduce Worker Risks....
increase restricted entry intervals (REIs)
increase pre-harvest interval (PHI)
require closed transfer systems
require enclosed cabs or maximum personal protective equipment
(PPE) for applicators
registrants must conduct studies and provide data comparing exposure
to airblast applicators with enclosed cabs, chemical resistant suits,
or other PPE; monitoring cholinesterase levels of harvesters; and glove
feasibility
limit application frequency and amount
To Reduce Ecological Risks...
prohibit most aerial applications
add spray drift language to labels
keep buffer zones for surface water
add language for inward spray nozzles
limit application frequency and amount
To Reduce Consumer Risks....
"Pick Your Own" operations may use azinphos-methyl only
early in the growing season or must increase pre-harvest interval
To Encourage Use of Safer Alternatives....
encourage development of Pest Management Strategic Plans
issue time-limited registrations
Provisions of the Azinphos-methyl IRED
Action: Cancellation
|
Date: Following Federal
Register publication
|
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Crop:
|
Alfalfa
Beans (succulent and snap) Birdsfoot trefoil Broccoli Cabbage Caneberries (blackberries, boysenberries, loganberries, raspberries): foliar application only Cauliflower Citrus Clover |
Cucumbers
Eggplant Filberts Melons (honeydew melon muskmelon/canteloupe, watermelons, other melons) Nectarines Nursery stock (quarantine use) Plums/dried plums Onions, green Parsley |
Pecans
Peppers Quince Spinach Strawberries Tomatoes Grapes Potatoes Celery Onions, dry bulb |
Action: Phaseout
|
Date: Over a 4 year
period
|
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Crop:
|
Almonds
Cherries, tart Cotton |
Cranberries
Peaches Pistachios |
Walnuts
|
Action: Time-limited Registration | Date: Period of 4 years | |
Crop: | Apples and crab apples Blueberries, lowbush and highbush Cherries, sweet Nursery stock, quarantine use |
Pears Southern pine seed orchards Brussel sprouts: application to soil at transplant Caneberries (blackberries, boysenberries, loganberries, raspberries): applications to canes and soil |