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本文对海南一些主要菜区遭受小菜蛾为害进行了田间调查,并将该虫在室内进行饲养、观察其生物学特性,探讨其发生规律以及农药防治试验研究,结果表明:该虫在海南一年可发生22代左右,具有明显的世代重叠,无越冬现象。10月至次年4月是为害盛期,是周年发生为害的重要害虫之一;成虫寿命5——23天,卵期2——18天,幼虫期5——18天,蛹期3——26天,全代历期15——75天。平均26.5天;青虫菌6号小面积防治效果平均达87.9％;40％水胺硫磷或20％杀灭菊酯与50％乐果混合液大面积防治效果较佳,分别为89.6％和89.1％。
In this paper, we conducted field surveys on the main food-borne cucumber moths damaged by Plutella xylostella in Hainan province. The insects were reared indoors, the biological characteristics were observed, the occurrence rules and pesticide control experiments were also studied. The results showed that the pest was in Hainan for one year Occurs about 22 generations, with obvious overlapping generations, no overwintering phenomenon. From October to April, it is one of the most important pests that cause damage on the anniversary. Adult life span is 5-23 days, egg stage is 2--18 days, larval stage is 5--18 days and pupal stage is 3- -26 days, the entire generation of 15 - 75 days. With an average of 26.5 days. The small-area control effect of Coccobacterium phlei 6 was 87.9% on average, and the control effect of 40% of the mixture of acetochlor or 20% fenvalerate and 50% dimethoate was 89.6% and 89.1% respectively %.