Why was this special local needs registration issued?

Residential areas with apple maggots pose a risk of pest infestation to adjacent commercial apple orchards. The primary product used by homeowners to control apple maggot was diazinon. Diazinon is being phased out of the marketplace and homeowners are having difficulty finding existing stocks. Imidan controls apple maggot however the main Imidan label does not allow for applications within residential areas. Therefore a special local needs registration with very specific residential use instructions was issued by WSDA.

Under what situations can this product (Imidan 70W SLN) be used?

In locations where WSDA has an apple maggot survey (trapping) program underway and they have a positive detection they will turn the location over to the local pest and disease board. That board will require the homeowner at that location to have the host plant treated by a licensed applicator. This is the only situation under which this label can be used legally.

Who can use this product?

(a) Homeowners who are producing fruit for sale and have a private applicators license; (b) Homeowners not producing fruit for sale but having a private commercial license with the ornamental insect category; or, (c) any persons having a commercial pesticide applicators license or people under their direct supervision. Please note the applicator must have a copy of this label in their possession at the time of application.

If a homeowner believes that plants on his/her property host apple maggots, can they arrange for the plants to be treated under this SLN?

Not unless the local pest board has contacted that homeowner and directed them to treat for apple maggot.

What plants can be treated under this SLN?

Apple, pear, plum, prune and hawthorn.

Are these all of the plants that can act as hosts for apple maggot?

No. Hosts of apple maggot are apple, crabapple, hawthorn, cherry, pear, plum, prune and quince.

Why aren’t all of the host plants listed on the SLN? Can this material be legally used on all host plants?

This material can only be used on apple, pear, plum, prune and hawthorn. Data on crop safety, efficacy and residue is available only for these plants. Additional data will need to be generated and pass review by EPA before the other crops could be added to the label.

Where are survey (trapping) programs currently underway?

WSDA has survey (trapping) programs underway in the Tri-Cities, Okanogan, Walla Walla, Spokane, Wenatchee, Yakima and Ellensburg areas for 2001. Special certification trapping programs are in place in Skagit and Whatcom counties.

If I have questions about the apple maggot survey program whom do I contact?

Mike Klaus, WSDA Yakima Office, at (509) 225-2609.

Why is the SLN a restricted use pesticide when the main label is a general use pesticide?

Gowan, the registrant for Imidan, does not have the required toxicity data to support a general use category in a residential setting for Imidan. EPA has allowed a residential use for this SLN under the conditions that it be labeled a restricted use product.

Fact Sheet: PIC-01001

Author: Catherine H. Daniels

Revised: 8/02/01