枣叶锈螨的生物学特性观察及其防治

Observation on the Biological Characteristics of Leaf Rust Mites on Chinese Dates and Their Control

近年来在山西省一些重点产枣县市发现枣叶锈螨为害日趋严重.为了控制螨害,保障生产,作者于1985—1988年对枣叶锈螨的生物学特性进行了持续4年的观察,并根据其发生规律进行了防治试验.在枣树发芽前喷波美5度石硫合剂,可有效地杀灭在枣股上越冬的成螨;5月下旬喷40%氧化乐果乳剂1000倍液,对已被螨害的枣树能起到控制的作用.

In recent years in certain main counties and cities producing Chinese date leaf rust mites have been found to cause increasingly serious damage. For the purpose of controlling mite damage and safeguarding production, the author of the present paper observed continuously for 4 years during 1985-1988 the biological characteristics of leaf rust mites on Chinese date trees,and conducted control experiments according to their regular pattern of occurrence. It was found that spraying lime sulphur at a concentration of 5 Baume on the tree before germination proved effective in killing the adult mites overwintering on the dates, and spraying 40% oxidized Rogor diluted 1000 times in late May also proved effective in controlling mites.