Influence of temperature on cyhexatin resistance inTetranychus urticae (Acari: Tetranychidae) |
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| Authors: | David G. James V. E. Edge J. Rophail |
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| Affiliation: | (1) Department of Agriculture, Yanco Agricultural Institute, 2703 New South Wales, Yanco, N.S.W., Australia;(2) Department of Agriculture, Biological and Chemical Research Institute, 2116 New South Wales, Rydalmere, N.S.W., Australia |
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| Abstract: | The effect of post-treatment temperature on the toxicity of cyhexatin to cyhexatin-susceptible (S) and resistant (R) strains ofTetranychus urticae Koch was investigated. Females and developmental stages of both strains showed a positive temperature-toxicity coefficient with wettable powder (WP) and emulsifiable concentrate (EC) formulations of cyhexatin. Females of the S strain were 3.0× and 2.9× less susceptible at 15°C than at 28°C with the EC and WP formulations respectively, while females of the R strain were 5.2× and 23.6× less susceptible at 15°C with these formulations. |
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