枇杷食叶害虫调查及枇杷黄毛虫室内药效试验

对福建福州、仙游三处枇杷园的调查表明,枇杷食叶害虫有24种,发生最严重的是枇杷黄毛虫和枇杷舟蛾,其次是扁刺蛾和双线盗毒蛾。调查地枇杷黄毛虫1年发生5代,第1代幼虫5月上旬出现,虫口数量最多。用阿维菌素、啶虫脒和氟虫腈对枇杷黄毛虫进行室内药效试验,结果表明,2%阿维菌素乳油2 000倍液、3%啶虫脒乳油1 000倍液和5%氟虫腈悬浮剂2 000倍液防治效果较好。

Defoliating insects of Loquat and the Efficacy Trials of Melanographia flexilineata in the Laboratory

The investigation showed that among the 24 species of loquat leaf-eating pests,the most severe insect pests were Melanographia flexilineata and Phalera flavescens,followed by Thosea sinensis and Porthesia scintillans.The Melanographia flexilineata occurs 5 generations a year,and the first generation of larvae appeared in early May,which has the largest population.In this study,Abamectin,Acetamiprid and Fipronil were used to do indoor efficacy tests on Melanographia flexilineata.The results showed that 2% Abamectin diluted to 2 000 times,3% Acetamiprid diluted to 1 000 times and 5% Fipronil diluted to 2 000 times had the best controlling effects.