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过去,我们这里稻纵卷叶螟只间歇发生,1972年以来,为害逐年加重,成为水稻的重要害虫之一。据初步观察,稻纵卷叶螟在本地一年发生5—6代。1974年第一代发蛾盛期在5月中旬,第二代在6月中旬,第三代在7月下旬,第四代在8月下旬,第五代在10月中旬,第六代蛾于10月下旬到11月上旬始见。一年中以7—8月间第三、四代为害较重。成虫有趋绿、群集、夜晚活动的习性,喜在绿嫩叶片上产卵,每个雌蛾产卵34—250粒,散产在叶上。干燥情况下卵孵化
In the past, we here rice leafroller only intermittently, since 1972, pests increased year by year, becoming one of the important pests of rice. According to preliminary observations, rice leafroller occurred 5-6 generations a year in the local. The first generation of hair moths in 1974 peak in mid-May, the second generation in mid-June, the third generation in late July, the fourth generation in late August, the fifth generation in mid-October, the sixth generation of moths See you in late October and early November. In the year of July-August, the third and fourth generations were harmed. Adults tend to green, clusters, habits of night activities, likes to spawn on green leaves, each female moth spawns 34-250, scattered in the leaves. Eggs hatch in dry conditions