pnn2003-33.html

Crop/Usage Sites: alfalfa, barley, bean (dry), beet (sugar), cabbage, canola, corn (field), corn (sweet), hops, lentil, oat, onion (bunching), onion
(dry bulb), pea (dry), potato, Regulatory Info/Miscellaneous, rye, sunflower, walnut, wheat

EPA and methyl parathion registrants have been negotiating new use rates and restrictions for this
chemical. EPA is currently proposing to delete the following methyl parathion uses: cabbage, dried
beans, dried peas, hops, lentils, pecans and sugar beets and to restrict use on sweet corn to Florida.
New use rates and maximum number of applications have also been proposed for the remaining
crops. Note that EPA may allow some uses now proposed for cancellation to continue if growers tell
EPA that methyl parathion is needed to control a specific pest and there are few suitable alternatives.
Anyone having comments on the proposed changes should contact EPA's Laura Parsons.

Information from a letter from Cheminova to USDA on this subject has been extracted and is contained
in the attachment portion of this notification. The complete letter, along with tables summarizing
proposed use changes are posted on the PNN Web page under miscellaneous information. See
www.pnn.wsu.edu .

The information contained in this notification is not to be used as a substitute for obtaining and reading pesticide
labels. Information provided by the PNN is neither a recommendation nor an endorsement by either Washington
State University or the Washington State Commission on Pesticide Registration.

Attachment:
1. Delete the following uses: cabbage, dried beans, dried peas, hops, lentils, pecans and sugar beets.
2. Restrict use on sweet corn to control silk fly only, which thereby restricts the use to Florida.
3. Require the rate and maximum application reductions the registrants have proposed.
4. Restricted Entry Intervals.

EPA wants the following REIs for the EC:
- Alfalfa - 4 days
- Barley - 4 days
- Corn - 3 days
- Sweet corn - 3 days for irrigation, 5 days for hand harvesting (note that these need to be recalculated to be specific to Florida and thus could be lower)
- Cotton - 6 days
- Grass - 4 days
- Oats - 4 days
- Onions - 7 days for irrigating/scouting, 10 days for hand harvesting (we believe EPA miscalculated this and asked them to reconsider it)
- Canola - 4 days
- Rice - 4 days

If you need to make corrections to any of the above information or if you have comments, please let us know by contacting Jane Thomas via
e-mail at jmthomas@tricity.wsu.edu, via FAX at (509) 372-7460, or via phone on (509) 372-7493. Additionally, comments may be submitted to
Alan Schreiber, WSCPR Administrator, (509) 266-4305.
Pesticide Notification Network

- Rye - 4 days
- Soybeans - 6 days
- Sunflower - 4 days
- Wheat - 4 days
- White potatoes - 8 days for weeding, 11 days for scouting (we believe EPA miscalculated this and asked them to reconsider it)

The REIs that EPA is proposing for the encapsulated product are as follows:
- Barley - 31 days
- Corn - 31 days
- Sweet corn - 39 (this could drop down to 5 days when recalculated for Florida only)
- Cotton - 11 days
- Oats - 31 days
- Onions - 8 days for irrigating, 13 days for hand harvesting
- Rice - 31 days
- Soybeans - 11 days
- Sweet potatoes - 11 days for irrigating, 14 days for hand harvesting
- Walnuts - 25 days
- Wheat - 31 days
- White potatoes - 10 days for irrigating, 12 days for hand harvesting

5. To lower potential exposures to aquatic organisms: methyl parathion may not be mixed/loaded or otherwise handled within 150-feet of natural bodies of water (or
aquatic habitats).
6. Closed delivery systems are required for the microencapsulated formulation.
7. Engineering controls such as a closed cab are required for application of both formulations.
8. Require applicator biomonitoring studies to confirm that the closed systems are adequately protective for applicators.