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1979年以来,鳃蚯蚓(Brunchium sp.)在冀西北稻作区发生达十多万亩,一般造成减产30％左右,成为该区水稻生产的障碍之一。1983-1987年作者对稻田鳃蚯蚓的生活规律与防治进行了初步调查研究,经过室内外结合,田间实地调查,多点药剂防治试验示范,基本掌握了鳃蚯蚓发生发展规律并提出了防治办法,1987-1990年将防治措施推广,取得了明显的经济效益。现将调查研究结果简述如下:
Since 1979, the gill earthworm (Brunchium sp.) Occurred in more than a dozen mu of paddy fields in the northwestern Hebei Province, generally resulting in a decrease of about 30% in production, becoming one of the obstacles to rice production in the area. From 1983 to 1987, the author conducted a preliminary investigation on the living rules and control of gill earthworms in paddy field. After the indoor-outdoor combination, the field investigation and the multi-point chemical prevention and control experiment demonstration, the author got a basic grasp of the occurrence and development of gill earthworm and put forward the control measures. From 1987 to 1990, the prevention and cure measures were promoted and obvious economic benefits were obtained. Now the survey results are summarized as follows: