The Guthion-resistant strain of walnut aphid parasite, Trioxys pallidus, was reared in the greenhouse on potted walnut trees and released into a commercialwalnut block near Gridley during the 1989 growing season where it established, survived Guthion,and spread to an adjacent blocktreated with Lorsban. Aphidand parasite counts suggest the parasites controlled the aphids in both the Guthionand L...

Abstract Pesticide resistance in medically significant disease vectors can negatively impact the efficacy of control efforts. Resistance research on ticks has focused primarily species veterinary significance that experience relatively high degrees pressure. tick medical received little attention, part because area-wide pesticide applications are not used to these generalist species. One few ef...

Pesticide resistance has become one of the pressing problems ecology and agriculture because it makes difficult to deal with pests ectoparasites while increasing chemical load on environment. This paper focuses importance studying insecticidal in agricultural, veterinary, medical insects. Brief information is given concerning crop insect different world regions commonly used insecticides. The m...

During the past year, we evaluated the fitness and likelihood of establishing the Guthion-resistant strain of walnut aphid parasite, Trioxys pallidus, in California walnut orchards by conducting a combination of laboratory and field experiments. We compared the stability of the azinphosmethyl resistance in the resistant strain and in progeny derived from crossing the resistant and the base colo...

We examine regulations for managing pest resistance to pesticide varieties in a temporally and spatially explicit framework. We compare the performance of the EPA’s mandatory refuges and a tax (or subsidy) on the pesticide variety under several biological assumptions on pest mobility and the heterogeneity of farmers’ pest vulnerability. We find that only the tax (or subsidy) restores efficiency...

Tremendous increases in pesticide use in cotton growing areas have severely affected the health of peoples and degraded environment [Poswal and Williamson (1998); Ahmad and Poswal (2000); Orphal 2001 and Khan (2000)]. Farmer Field School (FFS) based IPM implemented in the world to reduce dependence on pesticides and promote environmentally safe plant protection practices. An FFS-led Integrated ...

Monocrotophos administration at intervals induced variable responses in phosphatases, transaminases and aldolase of liver and plasma. Hepato-toxicity was aggravated under protein deficient state. A weak resistance to toxicity was observed in rats on low protein diet (5%). However, animals fed on protein enriched diet (20%) indicated an elevation in tissue defense mechanism and were able to comb...

Pesticide Action Network, United Farmworkers of America, and California Rural Legal Assistance Foundation analyzed California government data on agricultural poisonings and enforcement of worker safety standards. Nearly 500 pesticide poisonings were reported for California farmworkers every year from 1997 to 2000. The actual number of pesticide-related illnesses is unknown, since many poisoning...