论文部分内容阅读
广州地区2、3月份天气干旱的一些年份,麦蚜为害麦穗较重。1980年2、3月份虽较干旱,但麦蚜为害甚轻。考其原因是由于麦蚜(主要是麦长管蚜)受到自然天敌控制的缘故。1981年3月15日以前的天气,麦蚜和天敌情况与1980年大致相似。后来下了一场大雨,麦蚜又大量为白色真菌所寄生。因而对麦蚜主要天敌类群的研究将有助于农药的合理使用和天敌的保护利用。
Guangzhou wheat in February and March the weather arid years, wheat aphid damage heavier ears. February and March 1980 although more drought, but the aphids were very light. The reason for this is that the wheat aphids (mainly wheat aphid) are controlled by natural enemies. The weather before March 15, 1981, wheat aphids and natural enemies roughly the same as in 1980. After a heavy rain, wheat aphid and a large number of white fungus parasitic. Therefore, the research on the major natural enemies of wheat aphids will contribute to the rational use of pesticides and the protection and utilization of natural enemies.