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胡桃长足象是核桃果实的大害虫,为害损失很大。1975年以来,我们在四川平武地区进行了生活习性观察和防治试验,初步明确了以下几个问题。1.胡桃长足象一年一代。11月份以成虫越冬,次年4月上旬开始活动,为害果、芽、嫩枝、叶柄,5月上旬交尾产卵于果中,一般一果一粒,8月中旬产卵结束,10月陆续死亡。当年成虫6月中旬羽化,进行为害。2.成虫有假死性和向阳性,飞翔力弱,具有与核桃树芽苞相似的保护色。3.防治胡桃长足象,应抓住越冬成虫大量出现和卵孵化盛期时进行。用每毫升含孢量二至五亿的白僵菌液或50%的三硫磷乳油、50%速灭松乳剂、82%磷胺乳剂加水一千倍喷雾,效果良好。
Walnuts grow like walnut fruit pests, loss damage. Since 1975, we conducted a survey of life habits and prevention and control trials in Pingwu, Sichuan Province, initially clarifying the following issues. 1. Walnuts grow like a generation. In November the adults overwintering, the following year in early April to begin activities for the fruit, buds, shoots, petioles, early May mating spawning fruit, usually a fruit, mid-August spawning ends, in succession in October death. In mid-June adult emergence, for harm. 2. Adults have kinky and positive, flying weak, with walnut bud similar protective color. 3. Prevention and treatment walnut long enough to take hold of the emergence of large numbers of adult wintering and egg hatching peak time. Spores with two to five hundred million per milliliter of Beauveria bassiana solution or 50% of the triphoserine emulsion, 50% speed release emulsion, 82% of the phosphorus amine emulsion a thousand times the water spray, the effect is good.