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一、菜蚜1、为害特点:以桃蚜、萝卜蚜和甘蓝蚜为主,主要为害十字花科蔬菜,还为害茄科蔬菜,以成、若蚜群集于叶背面和嫩茎上吸食植物汁液。叶片受害,产生褪绿斑点,叶片发黄,重者叶片卷缩枯萎。极蚜还传播病毒病。2、生活习性:一般在春秋两季各有一个发生高峰。春季气温升高,蚜量增大;入夏后气温过高,抑制了蚜虫的繁殖;秋季气温渐降,蚜虫再度大量繁殖,入冬后越
First, aphids 1, pests characteristics: Myzus persicae, radish aphids and cabbage aphids dominated cruciferous vegetables, but also harmful to Solanaceae vegetables, into, if the aphid clustered on the back of leaves and tender stems on the use of plant juice . Leaf damage, produce chlorotic spots, leaves yellow, heavy leaf crimp wither. Very aphid also spread the virus disease. 2, habits: usually in spring and autumn each have a peak. Spring temperatures increased, the amount of aphids increased; into the summer after the temperature is too high, inhibiting the reproduction of aphids; autumn temperatures gradually decreased, aphids re-large-scale reproduction, the winter after the Vietnam