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Acephate - 2ee Recommendation for Orthene/Orthene WSP on Arborvitae to Control Arborvitae Leafminer 4/97

New York State Department of Environmental Conservation
Division of Solid & Hazardous Materials
Bureau of Pesticides & Radiation
Pesticide Product Registration Section
50 Wolf Road, Albany, New York  12933-7257
Phone 518-457-7446 FAX 518-485-8990

April 11, 1997

Mr. William G. Smith
Senior Extension Associate
Pesticide Management Education Program
Cornell Cooperative Extension
5123 Comstock Hall
Ithaca, NY 14853-0901

Dear Bill:

Re:  FIFRA 2(ee) Recommendation - Use of Orthene Tree, Turf and Ornamental
     Spray (EPA Reg. No. 59639-26) and Orthene Tree, Turf and Ornamental WSP
     (EPA Reg. No. 59639-88) to Control Arborvitae Leafminer on Arborvitae

The New York State Department of Environmental Conservation has approved your

request for a FIFRA 2(ee) recommendation for use of Orthene Tree, Turf and
Ornamental Spray (EPA Reg. No. 59639-26) and Orthene Tree, Turf and Ornamental
WSP (EPA Reg. No. 59639-88) to control Aborvitae Leafminer, a pest not cited
on the label, on Arborvitae.  Enclosed is a copy of the accepted
recommendation.

Anyone using Orthene Tree, Turf and Ornamental Insecticide under this
recommendation must have the written recommendation in their possession at the
time of application.

If you have any questions on this matter, please contact Betty Seeley, of my
staff, at (518) 457-7446.

Sincerely,

Maureen P. Serafini
Supervisor
Pesticide Product Registration
Section

Enclosure
cc:  R. Mungari - NYS Dept. of Agriculture and Markets

Proposed FIFRA 2(ee) Recommendation

Researcher and Title:
Daniel Gilrein
Extension Entomologist
Cornell Cooperative Extension of Suffolk County

Pesticide Name and EPA Registration No.:

Orthene Tree, Turf and Ornamental Spray    59639-26
Orthene Tree, Turf and Ornamental WSP      59639

Target Crop:
Arborvitae (Thuja Spp.)

Target Pest:
Arborvitue leafminer (Argyresthia spp.)

Proposed Appilcatlon Rate
2/3 lb/100 gal

Nature of 2(ee) Variation from Product Label:
New pest (crop is already listed)

Complete Recommendatlon as it will Appear In the Cornell Recommends:
Arbomtze leafminers (14) Argyriesthia spp.

Plant abnormalities        Tips of shoots and foliage turn yellow, then brown

Management options:        Many effective larval and pupal parasites.  Foliar
                           sprays to control larvae:  Acephate

When to treat:             Acephate foliar spray for larvae:  late April - mid
                           May, 100-150 GDD; again mid-August, 1800-2200 GDD

IPM considerations:        Parasites usually not abundant in specimen trees.
                           Two pesticide treatments may be required for first
                           year of treatment.  If infestation is light, prune
                           out infested tips.

Label Information(Spray)

                               Amount
                          ORTHENE Turf, Tree
                          Ornamental Spray    Time of          Recommended
Plants          Insects     per 100 Gals     Application       Application

Trees & Shrubs
  Arborvitae    Arborvitae    2/3 lb         When larvae are   Apply the
                 leafminer   (10.5 oz)       active:  late     specified
                                             April/early May:  amount of
                                             again mid-August  ORTHENE Turf,
                                             as needed.        Tree & Orna-
                                                               mental Spray in
                                                               100 gals. water
                                                               with a
                                                               hydraulic
                                                               sprayer as a
                                                               full coverage
                                                               spray.

Label Information (WSP)

                                Amount
                           ORTHENE Turf, Tree
                           Ornamental Spray    Time of          Recommended
Plants         Insects      per 100 Gals     Application       Application

Trees &
Shrubs
  Arborvitae   Arborvitae      2/3 lb        When larvae are   Apply the
                leafminer    (10.5 oz)       active: late      specified
                                             April/early May:  amount of
                                             again mid-        ORTHENE Turf,
                                             August as needed  Tree &
                                                               Ornamental
                                                               Spray in 100
                                                               gals. water
                                                               with a
                                                               hydraulic
                                                               sprayer as a
                                                               full coverage
                                                               spray.

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For more information relative to pesticides and their use in New York State, please contact the PMEP staff at:   5123 Comstock Hall Cornell University Ithaca, NY 14853-0901 (607) 255-1866

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