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两年来試驗研究和大面积防治調查資料表明:在小地老虎一龄盛期时(4月25日左右),田間杂草(小薊)密度大、栖食的幼虫数量多,当幼虫尚未向玉米上迁移之前,充分发揮除草的作用,可以減少田间虫群密度,減輕玉米受害。小地老虎一龄盛期是除草防治的最适时期。适期除草防治的效果与撒6％六六六毒土和噴5％二二三粉剂的防治效果不相上下,4月下旬除草減少死苗(断茎),效果达到45.83—58.5％,除草結合噴药有增效作用,減少死苗效果达到73.9％。除草防治具有农业防治的优点,經济有效、簡单易行。
Two years of pilot study and large-scale prevention and control survey data show that: in the first age of Tigers to a peak age (April 25 or so) field weeds (thistle) density, habitat number of larvae, when the larvae have not yet Prior to the migration on corn, give full play to the role of weeding, can reduce field insect population density, reduce corn damage. Little Tigers age is the weeding prevention and control of the most appropriate period. The effect of proper weeding was similar to that of 6% BHS and 5% 233. In late April weeding reduced dead seedlings (broken stems) with the effect reaching 45.83-58.5% In combination with spraying synergistic effect, reducing the dead seedling effect reached 73.9%. Weeding prevention and control has the advantages of agricultural control, cost-effective and simple.