济南市紫花苜蓿害虫和天敌种类及其发生动态的研究

为了控制紫花苜蓿害虫的危害，提高紫花苜蓿的产量和质量。2011年5-8月，本研究系统调查了济南唐王紫花苜蓿害虫和天敌昆虫的种类，分析了主要害虫及天敌的发生动态。结果表明：紫花苜蓿昆虫种类繁多，共7目14科32种，其中主要害虫有蚜虫、蓟马、叶蝉、盲蝽，主要天敌有草蛉、瓢甲、食蚜蝇等。蚜虫5-6月份危害严重，7-8月份少量发生；蓟马在紫花苜蓿的整个生长季节均有发生；叶蝉和盲蝽的发生有2个高峰期，分别在6月中旬和7月中旬。本研究为控制紫花苜蓿害虫提供直接、客观依据。

Study on the Species and Dynamics of Pest Insects and Their Natural Enemies on Medicago sativa L. in Jinan

In order to control the damage of pest insect on Medicago sativa L.,and improve the yield and the quality of Medicago sativa L..In this paper,the species and population dynamic of main insect pests and their natural enemies on Medicago sativa L.in Jinan were investigated.The results showed that the species of insect pests were abundant from May to August 2011,including 7 orders,14 families and 33 species.The dominant species of insect pests were Aphididae,Thtipidae,Cicadellidae and Miridae,and the main species of natural pest enemies were Chrysopidae,Coccinellidae and Syrphidae.Aphididae caused severe damages to Medicago sativa L.from May to June,and fewer damaged from July to August.Thtipidae invaded alfalfa throughout plant growing season.Two occurrence peaks existed in the invasion of Cicadellidae and Miridae were mid-June and mid-July.The data above provided useful information for controlling the pest insects on Medicago sativa L..