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小麦是我国主要的粮食作物,北方是小麦的主要产区,因此,能否搞好小麦生产是关系到人民生活的大问题。在小麦生产过程中,小麦害虫是影响小麦稳产高产的重要因素之一。为此,有效地防治小麦害虫的危害对小麦保产增收起着举足轻重的作用。 1 麦田主要害虫种类及发生特点 1.1 麦蚜(麦长管蚜):每年发生20～30代,以孤雌成蚜或若蚜在麦苗上或其它禾本科植物上越冬,一年当中发生有两个高峰,即秋季高峰和春季高峰,冬夏季蚜量极少。秋季小麦出苗后,麦长管蚜即迁入麦田,随即繁殖出现一个小高峰,随着气温下降,虫口数量逐渐减少,春季小麦返青以后,虫口开始增加,当小麦抽穗时,转向穗部为害,虫
Wheat is the main food crop in our country. The northern part is the main producing area of wheat. Therefore, whether or not we can improve the wheat production is a big issue that concerns the people’s livelihood. In wheat production, wheat pests are one of the important factors that affect stable and high yield of wheat. Therefore, the effective control of the harm of wheat pests plays an important role in increasing the yield of wheat. 1 Wheat Fields Pest species and occurrence characteristics 1.1 Wheat aphid (wheat aphid): Occur each year 20 to 30 generations to parthenogenetic or aphid in the wheat seedlings or other grasses overwinter, there are two in a year A peak, that is, the peak of the fall and spring peak, winter and summer aphids rarely. After the emergence of autumn wheat, the wheat aphid moved into the wheat field, and then a small peak appeared. As the temperature dropped, the population of the insect population gradually decreased. After the spring wheat returned to green, the population began to increase. When the wheat was heading, insect