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韭菜根蛆是地下害虫,幼虫大多群集在韭菜叶鞘基部鳞茎上为害蛀食,致使韭菜植株断裂,叶片美蔫变黄枯死,用手轻轻一拨,即可拨出断裂的韭菜株,在断口处可见有韭菜根蛆。韭菜蛆不仅为害韭菜,还为害大葱、小葱、大蒜、芹菜等蔬菜作物。韭菜根蛆在土里的发生,一般最初始于点、团,继后迅速蔓延发展扩大为害。 1.发生危害特点 韭菜根蛆以老熟幼虫在韭菜鳞茎里越冬。主要在每年的春季和秋季发生,在这两季里至少发生5代。一般越冬的幼虫可在3
Leek root maggots are underground pests, most of the larvae clustered in the chives leaves sheath base bulb damage pests, resulting in plant leeks rupture, yellow leaves of the United States turn yellow dead, gently tap a hand, you can dial the broken leek strains, at the fracture There are leek root maggots. Chives maggot not only harmful to leeks, but also harmful green onions, shallots, garlic, celery and other vegetable crops. Leek root maggots occur in the soil, usually the most initial point, the regiment, followed by the rapid spread of development and expansion of harm. 1. Harmful characteristics Leek root maggots to mature larvae in the leek bulbs wintering. Occurs mainly in the spring and autumn of each year, with at least 5 generations occurring in these two seasons. General overwintering larvae can be 3