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小木蠹蛾为我市行道树、庭荫树、中国槐、龙爪槐蛀干性害虫,被害后造成活立木枝干干枯、死亡或风折,甚致整株死亡,其被害株率高达98%以上,严重影响城市绿化及市容整洁。多年来我们采用多种农药如DDV、DDT、乐果、磷胺、氧化乐果进行防治,但效果都不理想。1980年在其生活史的观察饲养过程中,发现此害虫有怕氨气的习性,于6月份从化肥厂取来20%的氨水进行实验,防治效果很好。不但能杀死小木蠹蛾的幼虫,而且也能杀死蛹,同时对馒头柳树上的光肩星天牛的幼虫,也进行了同样的试验,其效果也很理想。现将试验方法与效果简述如下:
Small moths moths for the city sidewalk trees, Tingyin tree, Chinese Huai, Long claw Huai Chuan dry pests, after the victims caused by live branches dry branches, death or wind fold, even whole plant died, the victim strain rate as high as 98% Above, seriously affecting the urban greening and cleanliness of the city. Over the years we use a variety of pesticides such as DDV, DDT, dimethoate, phosphate amine, omethoate control, but the effect is not satisfactory. In 1980, during the observation and rearing process of its life history, it was found that this pest was afraid of the habit of ammonia gas. In June, 20% ammonia water was taken from the fertilizer plant for experiments, and the control effect was very good. Not only can kill the larvae of the codling moth, but also can kill the pupae, and the same test is also conducted on the larvae of the starfly Antennae on the steamed willow tree. The effect is also very satisfactory. The test methods and effects are summarized as follows: