稻田蜘蛛优势种对飞虱与叶蝉控制力的分析

Control of Paddy Spiders on Population of Rice Planthopper and Rice Leafhopper

系统调查结果表明 :长沙地区早稻田中 ,蜘蛛优势种相对稳定 ,在水稻各生育期内均为拟水狼蛛和食虫沟瘤蛛 ,并无更替现象 .采用灰色关联分析法 ,研究了长沙地区稻田蜘蛛优势种群对飞虱、叶蝉种群数量的控制程度 ,结果表明拟水狼蛛和食虫沟瘤蛛对飞虱、叶蝉种群数量影响最大 ,其次为锥腹肖蛸和八斑鞘蛛 .当拟水狼蛛与飞虱之比为 1∶ 2 0 .2 ,食虫沟瘤蛛与飞虱之比为 1∶ 1 4 .5以上时 ,蜘蛛对飞虱显示出明显的控制力 .

Grey relational grade analysis was used to study influence of spiders in rice field on population of rice planthopper and rice leafhopper. The results showed that the influence on rice planthopper was in the order of Ummeliata. insecticeps,Pirata subpiraticys,Coleosoma ocomaculata,Tetragnatha maxillosa and other spiders; on rice leafhopper the influence order was Pirata subpiraticys,Ummeliata insecticeps,Tetragnatha maxillosa ,Coleosoma octomaculata and other spiders .