摘要
Avermectin类农药对美洲斑潜蝇LiriomyzasativaeBlanchard生物活性的室内研究结果表明:揭阳霉素对美洲斑潜蝇1、2、3龄幼虫的LC50分别是154×10-4g/L、373×10-4g/L、199×10-3g/L;害极灭对上述幼虫的LC50分别是148×10-4g/L、368×10-4g/L和197×10-3g/L。美洲斑潜蝇幼虫对Avermectin类农药以1龄最敏感,其中揭阳霉素对3龄幼虫的LC50是1龄的129倍。揭阳霉素对雌成虫24h、48h的LC50分别是312×10-3g/L和208×10-3g/L,其对美洲斑潜蝇取食、产卵拒避持效期分别是4～8天和10天。使用浓度0005g/L揭阳霉素处理6天、8天和10天后接虫,幼虫的存活率分别是0、1613%和2807%。田间使用浓度0005g/L的揭阳霉素和00045g/L的害极灭分别处理,6天后的校正虫口减退率分别为910%和909%,两者差异不显著,而使用浓度00067g/L揭阳霉素处理,6天后校正虫口减退率为936%。
A series of laboratory experiments were carried out to test the biological activities of Avermectins against the vegetable leafminer Liriomyza sativae Blanchard.The results showed that the LC 50 of Jieyangmygin for the first, 2nd and 3rd instar larvae were 1 54×10 -4 g/L,3 73×10 -4 g/L and 1 99×10 -3 g/L, and that for Abamectin were 1 48×10 -4 g/L,3 68×10 -4 g/L and 1 97×10 -3 g/L,respestively The first instar larvae of L. sativae was the most sensitive to Avermectins in the three instars, the LC 50 of Jieyangmygin against the 3rd instar larvae was 12 9 times that of the first instar larvae For female adult,the LC 50 at 24h,48h by residue bioassay to Jieyangmygin were 3 12×10 -3 g/L and 2 08× 10 -3 g/L. Feeding and fecundity of adults were inhibited by Jieyangmygin for 4～8d and 10d, respestively When the larva were exposed to the leaves which had been treated with 0 005g/L Jieyangmygin, their survival rates within 6d, 8d and 10d were 0, 16 13% and 28 07%, respectively The results from field trials indicated that the population density of leafminer reduced by 91 1% and 90 9% after treated with 0 005g/L Jieyangmygin and 0 0045g/L Abamectin in 6d and there is not significantly different between them( P >0 05 DMRT). The results also showed that the population density of the leafminer reduced by 93 6% after treated with 0 0067g/L Jieyangmygin in 6d
出处
《昆虫学报》
CAS
CSCD
北大核心
2000年第1期28-34,共7页
Acta Entomologica Sinica
基金
国家科委"八五"科技攻关增强专题!( 85 0 2 1 0 8 0 1)
广东省科委重点科技攻关资助项目!( 95 660 78)
