Initial verification of the resistance management strategy for Frankliniella
occidentalis (Pergande) (Thysanoptera: Thripidae) in Australia |
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Authors: | GA Herron DF Cook |
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Institution: | ;NSW Agriculture, Elizabeth Macarthur Agricultural Institute, PMB 8, Camden, NSW 2570, Australia. ;Agriculture WA, Entomology Section, Crop Improvement Institute, Baron-Hay Court, South Perth, WA 6151, Australia. |
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Abstract: | Shortly after the initial detection of western flower thrips (WFT), Frankiniella occidentalis (Pergande), in Australia during 1993 a resistance management strategy based on the alternation of chemical groups was implemented. This study aimed to verify this strategy by field testing α-cypermethrin against WFT with and without chemical alternation. Up to 114 times α-cypermethrin resistance (at LC50) was detected and resistance increased with and without chemical alternation; however, chemical alternation did significantly reduce numbers of thrips compared with a nonalternation strategy. Resistance has the potential to undermine the sustainable use of those chemicals to which there is no current detectable resistance. Consequently, chemicals with a high frequency and level of resistance against WFT need to be identified through monitoring and quickly eliminated from WFT chemical control recommendations. |
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Keywords: | insecticides resistance management western flower thrips |
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