Evaluation of a Petri Plate Assay for Assessment of Abamectin Susceptibility in Tetranychus urticae (Acari: Tetranychidae)
1997; Oxford University Press; Volume: 90; Issue: 3 Linguagem: Inglês
10.1093/jee/90.3.742
ISSN1938-291X
AutoresFrancisca Campos, David Krupa, Richard K. Jansson,
Tópico(s)Study of Mite Species
ResumoA petri plate (rapid) bioassay for monitoring abamectin susceptibility in twospotted spider mite, Tetranychus urticae Koch, populations was evaluated. Decision rules for classifying resistance were established by using abamectin-resistant and -susceptible populations. The assay was validated with field samples collected in California and Florida by comparing a leaf residual bioassay with the petri plate bioassay. The petri plate bioassay, using a discriminating concentration of 3 ppm, n = 100, and a decision rule to declare detection of resistance when mortality fell below 87%, can accurately identify abamectin-resistant and -susceptible populations. The petri plate assay is also a good predictor of the mortality in the leaf residual assay.
Referência(s)