【摘要】 余杭植绥螨是竹裂爪螨的重要天敌。室内20℃恒温饲养余杭植绥螨需21．2 d完成一个世代、28℃则10．4 d 就可完成,30℃以上出现死亡。幼螨、第1若螨和雄成虫捕食量相对较少,雌成螨每天平均捕食竹裂爪螨5．5头,最多可捕食13头,雌成螨期最多可捕食165头。雌成螨捕食量大,发育即加快,产卵量增加,产卵期延长,卵粒个体也加大。一头雌成螨一生产卵量7-15粒,卵产于竹叶背面基部茸毛丛中或竹裂爪螨的丝网内。余杭植绥螨随竹裂爪螨种群数量的消长而消长,竹裂爪螨在浙江有二个明显的高峰期,其每个高峰期5-7 d后,余杭植绥螨也出现明显的高峰期;而余杭植绥螨每次高峰期后6-9 d,竹裂爪螨发生量就明显下降。更多还原

【Abstract】 Phytoseius yunhangensis is an important natural enemy of Schizotetranychus bambusae. The development period of one whole generation is 20. 2 days at 20℃, 10. 4 days at 28℃ in the lab, and it begins to die when the temperature is beyond 30℃. Predatory account of larva, protonympy and male adult is smaller than that of the female which can prey 5. 5 Schizotetranychus bambusae each day and 13 at most. In the whole period of female adult 165 Schizotetranychus bambusae can be preyed at most. To female adult mite, the more the predatory account is, the more rapidly it develops, so the production of eggs increases, the period of oviposition prolongs and the volume of the eggs becomes bigger. 7 - 15 eggs are laid per female which are laid on the basal part of the leaf back or in the net of Schizotetranychus bambusae. The population dynamics of Phytoseius yunhangensis is correlated closely with that of Schizotetranychus bambusae which appears 2 remarkable peaks in Zhejiang Province. And to Phytoseius yunhangensis, there is also a peak 5-7 days after each peak of Schizotetranychus bambusae. The density of Schizotetranychus bambusae decreases 6 - 9 days after the peak of Phytoseius yunhangensis.更多还原