Base levels of resistance to common control compounds by a New Zealand population ofVarroa destructor
| Autor: | H. M. Cox, R. M. Goodwin, Michelle A. Taylor, H.M. McBrydie |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | New Zealand Journal of Crop and Horticultural Science. 33:347-352 |
| ISSN: | 1175-8783 0114-0671 |
| DOI: | 10.1080/01140671.2005.9514369 |
| Popis: | Base levels of Varroa destructor resistance to four synthetic chemicals were established in new Zealand during May through August 2003. The four chemicals—amitraz, coumaphos, flumethrin, and fluvalinate are currently used, or may in the future be registered for use, in new Zealand. Resistance was measured by placing mites on paraffin wax impregnated with the chemicals. The lC50 estimate, adjusted for natural mite mortality, for amitraz was 110 μg/g, and >200 μg/g for coumaphos, 12 μg/g for flumethrin, and 1269 μg/g for fluvalinate. A comparison with international data indicates that new Zealand populations are not currently resistant to flumethrin. The LC50 for two Italian locations with mites resistant to fluvalinate was 385 and 857 μg/g, and 16–17 μg/g for non‐resistant varroa (Milani 1995). Whether the adjusted LC50 for fluvalinate in this trial (1269 μg/g) would be observed as resistance in the field in New Zealand is unknown. Because this is the first time these tests have been conducted in ... |
| Databáze: | OpenAIRE |
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