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在广东过去对为害水稻的几种夜蛾科害虫,統称为剃枝虫。其中能显著为害水稻的是粘虫与水稻叶夜蛾。后者在本省分佈很普遍,並且,在一些地区,威胁生产很大。例如在阳江县1957年5月中旬水稻叶夜蛾为害早稻及单造秧苗面积达40.979亩。在南海县1954年7月間全县普遍发生为害晚造秧田,在六区严重为害之秧田平均每平方市尺有幼虫94头,中等害的秧田平均每平方市尺有幼虫54头。經过調查,我們証实了水稻叶夜蛾在广东为害是有历史性的,为广东水稻重要害虫之一。現将近两年来对水稻叶夜蛾的一些生活习性观察和化学防治初步結果整理,提供有关方面参攷。
In the past in Guangdong on the damage of rice several noctua pests, collectively referred to as shaving insects. Which can significantly damage rice is the armyworm and rice leafworm. The latter are widespread in the province and, in some areas, the threat is very large. For example, in Yangjiang County in mid-May 1957, the damage caused by rice budworm moth and monocropped seedling area reached 40.979 mu. In Nanhai County in July 1954, the occurrence of late-stage seedling was prevalent in the county. In the severely damaged seedling fields in the six districts, there were an average of 94 larvae per square foot, and the median spoiled seedling had an average of 54 larvae per square foot. After investigation, we confirmed that the damage caused by the rice spider moth in Guangdong is historic and one of the important pests in Guangdong rice. Nearly two years now, some of the life-style observation of rice budworm and preliminary results of chemical control finishing, provide relevant information.