Influence of the ratio of Ectropis obliqua warren to spiders on the competitive interspecies effects of nomadic spiders
In order to clarify the effect of the ratio between Ectropis obliqua warren and natural enemies on the competition of natural enemies and provide an effective basis for the biological control of Ectropis obliqua warren,the dominant species natural enemies were obtained. In this study,grey correlation analysis method,competition coefficient analysis method,competition intensity index method,variance analysis method and t-test were used to analyze the competition effect of seven spider natural enemies on feeding tea geometrid during peak days of Ectropis obliqua warren in four tea plantations,namely,Anji Baicha,Longjin 43,Pingyang Tezao and Nongkangzao. The results of grey correlation analysis showed that Clubiona Japonicola,Blacksalticidae and Misumenopstricuspidatu were the top three natural enemies most closely related to the number of Ectropis obliqua warren. The competition coefficient analysis showed that the competition intensity of the two natural enemies affected by the ratio were Xysticus ephippiafus and Oxyopes sertatus. The results of competition intensity index analysis showed that the three natural enemies affected by the ratio were Xysticus ephippiafus,Misumenopstricus-pidatu and Oxyopes sertatus. Based on the above analysis,it was concluded that the competition ability of Xysti-cus ephippiafus and Oxyopes sertatus was more strongly influenced by the ratio of the pest to the natural enemy. Therefore,the protection and utilization of these two natural enemies should be strengthened according to the ratio of the pest to the natural enemy in the control process of the Ectropis obliqua warren. The result provides a scien-tific basis for reasonable protection and utilization of natural enemies of Ectropis obliqua warren.
Ectropis obliqua warrennatural enemiesgrey correlation degreecompetition coefficientcompetition intensity index
万方数据
维普
