The Washington State Department of Agriculture (WSDA) has recently updated the list of  pesticides that are allowed for use in marijuana production in Washington State, based on  criteria previously established by WSDA.

WSDA has added six new Section 3 pesticides and ten new Section 25(b) pesticides to the list of allowable products for a total of 16 new products. There were 21 Section 3 pesticides and 6 Section 25(b) pesticides removed from the list.  The updated list contains 241 Section 3 pesticides and 94 Section 25(b) pesticides, for a total of 335 products.

WSDA has two columns on the list: (1) Section 3 pesticides that are subject to Worker Protection Standard (WPS) requirements, and (2) Section 3 pesticides that are limited to use by non-commercial “HG Only” marijuana growers. The products designated as “HG Only=Yes” may only be used by those individuals authorized to home grow medical use marijuana.

Products marked as “HG Only=Yes” may not be used in the commercial production of marijuana.

Spray adjuvants are not included on the list—however any spray adjuvant that is labeled for use on food crops can be used with an allowed pesticide that is applied to marijuana, as long as the intended use is authorized by the spray adjuvant label. For example, a spray adjuvant labeled only for use with an herbicide cannot be used with an insecticide or fungicide. Information on spray adjuvants that are registered for distribution in Washington is available from the WSU PICOL database.

Please check your stock of pesticides against the list to ensure that you are using an allowed product. Marijuana growers can continue to use any existing stocks of pesticides that were removed from the list, but no new product can be purchased.

All of the pesticides that were added to the list contain active ingredients that were already allowed for use in marijuana production.

Some pesticides are labeled for application to soil or to crop plants, while some pesticides are labeled for application to both soil and crop plants (e.g., insecticides, fungicides). Other pesticides include herbicides labeled for direct application to, and control of, unwanted plants (i.e., weeds). Remember to read, understand, and comply with all applicable label directions and precautions when using any pesticide.

 

 Pesticides Added:                                                                        Registration Number

1. Arcus Plant Growth Regulator for Seed Treatment.           EPA No. 84846-5
2. Guarda EPA No. 92144-2-70299
3. Milstop SP EPA No. 68539-3
4. Proof cold-pressed Neem Oil EPA No. 88760-10
5. Seican EPA No. 91473-2-88783
6. Suppress Herbicide EC EPA No. 51517-9
7. Earth’s Ally Disease Control No. 996600-20007
8. Earth’s Ally Disease Control Concentrate No. 996600-20008
9. Earth’s Ally Insect Control No. 996600-20002
10. Earth’s Ally Insect Control Concentrate No. 996600-21002
11. GroSafe Bio-Pesticide, Miticide, Fungicide No. 996330-20001
12. Grower’s Ally Fungicide No. 996600-20005
13. Grower’s Ally Fungicide Concentrate No. 996600-20006
14. Grower’s Ally Spider Mite Control No. 996600-20001
15. Grower’s Ally Spider Mite Control Concentrate No. 996600-20003
16. Procidic C No. 999550-21002

Pesticides Removed:

1. Actino-Iron Biological Fungicide EPA No. 73314-2
2. Actinovate Ag Biological Fungicide EPA No. 73314-1
3. Amicos EPA No. 91473-1
4. Bayer Advanced Natria Disease Control RTU EPA No. 264-1161-72155
5. Bayer Advanced Natria Insecticidal Soap RTU EPA No. 67702-21-72155
6. Bayer Advanced Natria Neem Oil Concentrate EPA No. 67702-21-72155
7. Carbon Power EPA No. 84846-2
8. Companion Liquid Biological Fungicide for Ag Use EPA No. 71065-3
9. Genesis Gib-4% EPA No. 55146-62-71089
10. Gibgro 20% Powder (Gibberellic Acid) EPA No. 55146-53
11. Gibgro 4LS (4% Liquid Gibberellic Acid) EPA No. 55146-62
12. Grandevo PTO EPA No. 84059-17-87865
13. Greencure EZ EPA No. 70870-3
14. Omni Oil 6E EPA No. 5905-368
15. Perox-Cide EPA No. 83103-1-43553
16. Perpose Plus EPA No. 86729-1
17. Prefence Biofungicide EPA No. 64137-5-68539
18. Preferal Microbial Insecticide EPA No. 70051-19-67690
19. Pyrenone Crop Spray EPA No. 432-1033
20. Regalia PTO EPA No. 84059-3-87865
21. The Ecology Works Soluneem EPA No. 81899-4-67419
22. Eco-Mite Plus Botanical Insecticide Miticide No. 74578-14001
23. Eco-Mite Plus Botanical Insecticide Miticide Concentrate No. 74578-14002
24. Eco PM Botanical Fungicide Concentrate No. 74578-13003
25. Eco-PM Ready to Use Botanical Fungicide No. 74578-13001
26. Mildew Control No. 89943-15001
27. Nematode Control No. 89943-13001

You can find the complete list of pesticides that are allowed for use in marijuana production, the criteria WSDA used to establish the list, and information regarding statewide stop-sale orders in Washington on the WSDA web site: https://agr.wa.gov/departments/marijuana/pesticide-use

Contact Information:

For information regarding the registration of pesticides and fertilizers, please contact the WSDA Pesticide and Fertilizer Registration

• Phone: 360-902-2025

Email for pesticide registration: [email protected] Email for fertilizer registration: [email protected]

For information regarding how to comply with the pesticide label, please contact the WSDA Pesticide Compliance

• Phone: 360-902-2040
• Email: pc[email protected]

For any other questions, please contact your Liquor and Cannabis Board enforcement officer.