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随着大蒜种植面积的不断扩大及大蒜连作,蒜田地下害虫发生也逐年加重,尤其是根蛆危害更为严重,致使大蒜品质变劣,产量下降,一般减产20%～30%,大大影响了出口创汇和蒜农的收入。一、蒜田地下害虫的种类及危害特点 (一)葱地种蝇别名葱蝇、葱蛆、蒜蛆,是大蒜的主要害虫。一年发生2代,以蛹在土壤中越冬越夏。一代卵孵化期正是大蒜抽薹期,二代卵孵化期正是大蒜出苗期,因此,危害严重的有2次:第一次是在秋播季节,秋天气温偏高,天气较暖,幼虫可危害刚出土的大蒜幼苗造成太片死亡;第二次是在春天地温回升后,条件适宜,在烂母期严重危害大蒜,幼虫从大蒜根盘部食入,向上蛀食,轻者鳞茎被蛀成孔道,心叶枯黄,植株萎蔫,重者地下幼茎全部蛀食一空,仅
With the continuous expansion of garlic planting area and continuous cropping of garlic, garlic pests also increase year by year, especially the root maggot more serious damage, resulting in poor quality of garlic, production decline, the general reduction of 20% to 30%, greatly affected Export earnings and garlic farmers income. First, the types and hazards of garlic pests underground pests (A) onion fly species alias onion fly, onion maggot, garlic maggot, is the main pest of garlic. Generation 2 occurs a year, with pupa in the soil over winter and summer. A generation of egg hatching period is the garlic bolting period, the second generation of egg hatching period is the garlic seedling stage, therefore, have two serious harm: the first is in the autumn seasons, autumn high temperatures, the weather is warmer, the larvae can Harm the newly excavated garlic seedlings cause too much death; the second is in the spring after the temperature rise, the conditions suitable for serious damage in the rotten mother garlic, larvae from the garlic root disk into the Department, upward eating, the light bulbs were eaten Into the hole, the heart leaves yellow, wilting plants, severe underground young stems all eaten, only