Title: Characterization and Exploitation of Instability of Spider Mite Resistance to Acaricides
Abstract:Resistance of spider mites to some important acaricides has been observed to increase in response to selection and to decline in the absence of selection. Management of such resistances could be based...Resistance of spider mites to some important acaricides has been observed to increase in response to selection and to decline in the absence of selection. Management of such resistances could be based on development of methods for monitoring resistance and characterization of the processes responsible for declining resistance frequencies in the absence of selection. Studies of the dynamics of resistance to dicofol in two ecologically dissimilar acarine pests of New York apple, Panonychus ulmi and Tetranychus urticae, are described. Methods were developed which allow rapid estimation of the frequency of resistant mites in field populations. Studies conducted in 1987 related the susceptibility of field populations to acaricide use. Laboratory studies conducted in 1987-88 characterized the rate of decline of resistant genotypes in caged populations and derived selection coefficients to estimate the relative fitness of resistant individuals. Strategies for management of dicofol resistance will be based on information from dynamics of resistance and cross-resistance, and ultimately will prescribe temporal rotations of dicofol and alternate chemicals in order to keep the frequency of dicofol resistance below levels which impair acaricide efficacy.Read More
Publication Year: 1990
Publication Date: 1990-02-23
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
Cited By Count: 22
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