农、林作物害虫秋末进入休眠期,此时抗药力最差,虫源集中。利用害虫这一特性,抓住秋末冬初这一有利时机开展防治,不仅花钱少,而且可大大降低来年虫源。 小麦蚜。小麦蚜虫多以卵在麦苗枯叶上,杂草下,土壤缝中越冬,而且愈向北方,以卵越冬率越高。在冬季防治上,一是浇水,浇好冬水,既可使麦蚜大量死亡,又能利于小麦越冬。二是冬季清除田间秸秆、枯叶、杂草、闲置地进行深翻,利用低温冰死害虫。三是早春磨(来巴)镇压,既可杀虫,又可收到保墒防旱的目的。 玉米螟。其多在秸秆上以幼虫形态越冬,所以除把秸秆做牲畜饲料外,还要对残体采取沤、烧、轧、铲、剥的办法消灭干净、彻底。 谷子钻心虫。其全部在谷子根茬中越冬, Pesticides of agricultural and forest crops went into dormancy in late autumn, and resistance to pesticides was the worst at this time, and the insect sources were concentrated. The use of pests this feature, seize the early autumn beginning of this favorable opportunity for prevention and treatment, not only less money, but also greatly reduce the source of the next year. Wheat aphid. Wheat aphids and more eggs in the wheat seedling leaves, weeds, the soil cracks in winter, and more to the north, the higher the rate of overwintering eggs. In winter prevention and control, one is watering, pouring winter water, can make a large number of wheat aphids death, but also conducive to winter wheat. Second, clear the field in winter straw, dead leaves, weeds, idle deep plowing, the use of low temperature ice death pests. Third, early spring mill (to Palestinian) repression, both insecticide, but also received the purpose of drought and water conservation. Corn borer. Most of its straw in the form of larvae overwintering, so in addition to the straw as livestock feed, but also to the debris to take 沤, burning, rolling, shoveling, stripping the way to eliminate clean and thorough. Millet worm worms. Its all over the winter stubble in the millet,