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为了明确长春地区苜蓿田害虫和天敌种类及其田间消长规律,试验通过定期田间调查,初步鉴定了苜蓿害虫22种,主要包括半翅目、鞘翅目和直翅目昆虫;天敌7种,主要包括鞘翅目、双翅目和半翅目等昆虫;分析了主要害虫(蚜虫、叶蝉、蝽)以及优势天敌(瓢虫类)的田间种群消长规律,即豆无网长管蚜的消长动态呈单峰型,牧草盲蝽、三点盲蝽和大青叶蝉的消长动态呈双峰型,而七星瓢虫、异色瓢虫和龟纹瓢虫的消长动态亦呈双峰型。
In order to clarify the species of pests and their natural enemies and the laws of their growth and decline in Changchun area, 22 field trials of alfalfa pests were conducted, including 22 Heteroptera, Coleoptera and Orthoptera, and 7 natural enemies including Coleoptera, Diptera and Hemiptera. The population dynamics of major pests (aphids, leafhoppers and bugs) and dominant predators (ladybirds) were analyzed. The dynamics of the growth and decline of unimodal, Lagers staghorn, Apodemus igniatus and Leafhopper showed a bimodal pattern, while the dynamics of growth, decline and growth of C. septentrionalis, C. heterochina and Propylaea japonica showed a bimodal pattern.