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临朐是山东省桑蚕茧生产的第一大县,桑黄化型萎缩病是该县桑园的主要病害。近几年已扩散蔓延,严重影响到桑蚕生产的发展。为了摸清桑黄化型萎缩病的发生规律,找出切实可行的防治措施,我们于1989年9月～11月,在桑园面积大、蚕茧产量高的龙岗、上林和辛寨三乡镇对桑黄化型萎缩病的发生危害进行了调查。一、调查结果(一)发生面积大。龙岗、上林和辛寨三乡镇桑黄化型萎缩病的发病面积共有5558.2亩,占桑园总面
Linqu is the largest county in Shandong Province for the production of silkworm cocoons. Morinopathia atrophy is the main disease of the mulberry garden in this county. In recent years has spread and spread, seriously affecting the development of silkworm production. In order to find out the regularity of the occurrence of atrophy type of Wulian yellow, and find out practical prevention and control measures, we in September 1989 ~ November, in mulberry area, cocoon production of Longgang, Shanglin and Xinzhai three townships On the mulberry yellow type shrinkage disease hazards were investigated. First, the findings (a) the occurrence of large area. Longgang, Shanglin and Xinzhai three Township Morinosis type atrophy disease incidence area a total of 5558.2 acres, accounting Mulberry total surface