From pestmgt@empm.cdpr.ca.gov Wed Apr 13 23:23:47 1994 Date: Wed, 13 Apr 1994 13:38:42 -0800 From: Pest Management To: sanet-mg@ces.ncsu.edu The California Department of Pesticide Regulation (DPR) has developed a list of California crop/pest situations which may lack pest management alternatives to specific pesticides which may not be available in the future, leaving growers with no method for control. Lack of availability could be due to regulatory action, voluntary withdrawal from the California market, or other actions. We would like to receive information from anyone who has knowledge of possible alternatives for these situations. We would also like to make this list widely available to stimulate new research projects to investigate these systems. Some of these systems could make good projects for university seniors or graduate students. DPR does not have any money to support such research. We can, however, facilitate contacts between researchers and possible funding sources. The list was generated by a task force under the direction of Dr. Mary Louise Flint, director of IPM Education and Publications, University of California Statewide IPM Project. This task force was initiated by the Pest Management Advisory Committee, which was created by the Department of Pesticide Regulation and the California Department of Food and Agriculture in June 1992 to help find alternative crop protection strategies. The purpose of the task force was to determine what pesticides might be lost on a number of crops and to determine what alternatives exist for these uses. The task force also developed a list of pests which are showing or likely to show pesticide resistance problems that could seriously affect their management. Here is the list of pest and crops, not in any order of priority, that lack alternatives to particular pesticides, which are given in parenthesis. 1. Nematodes on most of the reviewed crops (fenamiphos, aldicarb, and other materials). 2. Lacy scab in prunes (captan). 3. Third generation codling moth in walnuts (azinphosmethyl). 4. Downy mildew, purple blotch, and botrytis in onions where 3 year rotation is impractical (chlorothalonil). 5. Late blight in potatoes, especially in coastal humid areas (chlorothalonil, maneb, mancozeb). 6. Aphids in seed potato crops and russet Burbank varieties in the Tule Lake area of California (methamidophos). 7. Darkling beetles in lettuce (endosulfan). 8. Root aphid in lettuce (disulfoton). 9. Scab in pears, particularly in the Lake County area (captan). 10. Phomopsis in grapes (captan). 11. Lygus bugs in tomatoes (endosulfan). 12. Early blight in tomatoes (chlorothalonil, mancozeb). 13. Rice water weevil in rice (carbofuran). 14. Mites in dry beans (propargite). DPR is looking for, and wishes to encourage the development of, chemical and non chemical alternatives which: a) are readily available (and will continue to be available); b) are effective in the area where they will be used; c) have sufficient information on how to use them effectively in an area; d) are competitively priced; e) are no more hazardous for the environment and human health; f) can be integrated into an economically viable production system. The task force felt that some pests are likely to develop resistance to all or almost all pesticides and need further research in developing IPM strategies that would lessen resistance problems. These pests include: 1. Silverleaf or sweetpotato whitefly in broccoli. 2. Aphids in lettuce and broccoli. 3. Leafminers in lettuce. 4. Flies in structural control. 5. Mosquitoes. 6. Rodents in structural control. 7. Codling moth in apples, pears, and walnuts. Pest management alternatives on these and other crops will continue to be investigated and these lists are likely to be modified in the future. Anyone having information about any of these situations or wishing to comment or participate in this process should contact us through electronic mail (email) at our email address: pestmgt@cdpr.ca.gov.