论文部分内容阅读
草间小黑蛛Erigonidium graminicolum(Sundevall)是思南县稻田蜘蛛中极其重要的优势种群。据扩头坝1980年系统调查,草间小黑蛛占总蛛数的比率,早稻田为63～80％、中稻田为60～75％、晚稻田为60～77％;1981年4月对油菜、小麦、绿肥田的调查,草间小黑蛛占总蛛数的比率依次为71.8％、78.2％、82～98％。草间小黑蛛不但数量大,而且具有发生早、分布广、年活动时间长、种群稳定等特点,是一种很有利用价值的天敌蜘蛛。
Erigonidium graminicolum (Sundevall) is an extremely important dominant species in the rice field spiders in Sinan County. According to the expansion dam system survey in 1980, black grass spire number of the total number of spider, the early rice fields of 63 to 80%, 60 to 75% of mid-field rice, late rice fields of 60 to 77%; April 1981 rape , Wheat, green manure field survey, black grass spire number of the total number of spider were 71.8%, 78.2%, 82 ~ 98%. Small black spider grass is not only a large number, but also has occurred early, widely distributed, the activity of a long time, stable population characteristics, is a very valuable natural enemies spiders.