Monitoring,characterization and management of diamondback moth resistance to spinosad and indozacarb
Spinosad and indoxacarb are two different classes of insecticides with novel modes of action introduced in the late 1990s. In some areas such as Hawaii. They were the most important insecticides to control the diamondback moth,PluteUa xylosteUa(L.),and were used in area-wide insecticide resistance management rograms.Populations of P.xylostella were collected from fields of crucifer vegetables in the USA and Mexico from 1 999 to 2005 for baseline susceptibility tests and resistance monitoring to both new insecticides.Most populations were susceptible to both insecticides,but resistance to spinosad extended from Hawaii(2000)to Georgia(2001)and California(2002)in the USA and then in Mexico(2005).Several populations collected from Hawaii in 2003.2005 showed varying 1evels of resistance to indoxacarb.Further studies on stability, fitness cost,inheritance,and mechanism of P.xylostella resistance to spinosad and indoxacarb were conducted after the field-derived resistant colonies were obtained. Interstrain complementation tests for allelism showed that there is a major recessive lOCUS for resistance to spinosad shared by three P.xylostella populations from Hawaii,Georgia and California.When spinosad,indoxacarb and Bacillus thuringiensis (Bt)were used simultaneously in a mosaic fashion in a greenhouse cage experiment with P.xylostella,the resistance development to each insecticide was more rapid compared to when these products were used in a rotation every one or three generations of P.xylostella. This study illustrates a useful example of how a proactive monitoring program can be developed prior to the spread of insect resistance to a new insecticide.Regular and proactive monitoring provided industry and extension personnel the necessary information to help growers switch products before a major economic loss of the crop.A more sophisticated resistance management program that employs the thoughtful and cooperative rotation of products on an area-wide basis -would enhance the longevity of each product even more.
Jian-Zhou Zhao Anthony M.Shelton Hilda L.Collins Mao Chen Ronald F.L.Mau
Department of Entomology,Comell University/NYSAES,Geneva,NY 14456 Pioneer Hi-Bred.a DuPont Company,7 Department of Entomology,Comell University/NYSAES,Geneva,NY 14456 Department of Plant and Environmental Protection Sciences,University of Hawaii at Manoa,Honolulu,HI
国际会议
北京
英文
258-263
2006-10-24（万方平台首次上网日期，不代表论文的发表时间）