真水狼蛛的生物学和田间种群动态研究  

STUDIES ON BIOLOGY OF THE SPIDER, PIRAT A PIRATICUS AND ITS POPULATION DYNAMICS IN RICE FIELDS

作　　者：彭宇[1] 刘凤想[1] 赵敬钊 胡萃[2] 

机构地区：[1]湖北大学生命科学学院 [2]浙江农业大学植保系,杭州310029

出　　处：《蛛形学报》1999年第2期80-84,共5页Acta Arachnologica Sinica

摘　　要：真水狼蛛在湖北武汉1a发生3个不完整的世代,以第2代历期最短,第3代(越冬代)历期最长。主要以亚成蛛越冬。雌、雄均可多次交配。真水狼蛛1生最多可产4个卵袋,平均2.8个,含卵量较大(平均90粒)。雌蛛有较强的护卵、护幼习性。卵的孵化率较高,平均孵化率为91.36％。真水狼蛛共蜕皮6次,有7个龄期。性比各个世代均为雌蛛多于雄蛛。真水狼蛛捕食叶蝉、飞虱等多种水稻害虫,捕食量与龄期、蜕皮和性别有关。真水狼蛛在6月5日左右开始由田埂向稻田内迁移,1a有2个发生高蜂,分析了影响真水狼蛛种群动态因素。The biology of Pirata piraticus, one of the major spiders in rice fields,was examined under laboratory conditions and fields. In the Wuhan area,the spider over - winters mainly as penultimate mstar. It has 2-3 generations each year,the duration of the 3 rd generation is the longest,that of 2 nd generation is the shortest. Both female and male mate several times without cannibalistic behavior. One female can lay 2-4 egg sacs and the average number per egg sac is 90. The mean hatching rate of eggs is about 91. 36%. After molting six times, spiderlings become mature. The sex ratios of female to male in all generations are bigger than 1 :1. The spider can prey on many kinds of rice pest insects. The spider begins to move into the rice field from the levee on 5 June,the population density have two peaks in one year.

关 键 词：真水狼蛛 生物学特性 种群动态 

分 类 号：Q959.226.2[生物学—动物学] S476[农业科学—农业昆虫与害虫防治]