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苹果小卷叶蛾是我场苹果的主要害虫之一,严重年份果实受害率达30%左右。1973年以前,主要防治措施是在幼虫期喷洒敌百虫、敌敌畏等农药,曾收到良好的防效。但由于连年多次使用,不仅害虫产生抗药性,同时杀伤了大量天敌,造成年年防治,害虫年年严重。1972年在果园发现一种卷叶蛾甲腹茧蜂(Ascogaster SP·)对苹果小卷叶蛾的寄生率较高,随于1973～1974年在我场果园进行寄生情况的调查,并观察其生物学特性。现将结果报道于后:
Apple leaf roller moth is one of the main pests in my field of apples, severe fruit damage rate of about 30%. Prior to 1973, the main control measures were spraying pesticides such as trichlorfon and dichlorvos during the larval period and had received good control effects. However, due to repeated use year after year, not only the pest produces resistance, but also kills a large number of natural enemies at the same time, resulting in annual prevention and control and serious pests. In 1972, the orchard found a leaf moth Parasitoid wasp (Ascogaster SP ·) on the apple leaf roller moth parasitic rate higher, with 1973-1974 in our field orchard of parasites survey and observe its biological characteristics. The results are reported later: