Management of Egyptian Alfalfa Weevil and Protection of Yields with Selected Insecticides
نویسندگان
چکیده
The Egyptian alfalfa weevil (alfalfa weevil in some areas) during most years is the most severe insect pest of alfalfa in California. These pests feed on alfalfa leaflets and stems, reducing hay yields. Several insecticides provide acceptable control of this pest. Historically, product choice has been driven by efficacy on the pest, cost, presence of other pests, i.e., aphids, days before harvest, etc. However, in recent years insecticide usage, particularly organophosphate and carbamate insecticides, in alfalfa has been under increased scrutiny and has been suggested as a factor contributing to the levels of insecticides in surface waters. New classes of products have been registered and others are being considered for registration. These new products although facilitating protection of surface waters, may not have the optimal properties for IPM in alfalfa. Studies were conducted to evaluate the fit of these materials into alfalfa IPM and to examine the impact of Egyptian alfalfa weevil populations on alfalfa productivity.
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