5种寄主上的尼氏真绥螨对柑橘红蜘蛛的捕食能力差异研究

室内测定了5种寄主上的尼氏真绥螨对柑橘红蜘蛛的日捕食量和持续捕食能力。结果表明,柑橘上的尼氏真绥螨成螨对柑橘红蜘蛛成螨的日均捕食量最大,显著高于紫苏;而梧桐、薄荷和茶叶3种寄主上的尼氏真绥螨对柑橘红蜘蛛雌成螨的捕食力与柑橘上的无显著差异。对柑橘红蜘蛛若螨的捕食能力以薄荷和梧桐上的显著为高,柑橘和茶叶上的次之,紫苏上的最低;而5种寄主上的尼氏真绥螨对柑橘红蜘蛛幼螨的日均捕食量之间无显著差异。对柑橘红蜘蛛成螨的持续捕食能力结果显示,各处理连续3天的日均捕食量基本呈现略微降低的趋势,但3天之间均无显著差异。上述结果证明不同寄主上的尼氏真绥对柑橘红蜘蛛的捕食能力存在差异,且对柑橘红蜘蛛成螨的捕食能力较为稳定。

Difference of Predatory Capacity for Euseius nicholsi from Five Different Host Plants Preying on Panonychus citri

The daily and persistent predatory capacity of Euseius nicholsi from five different host plants on Panonychus citri were determined in the lab.The results showed that the daily predatory amount of a female adult from citrus on adults of P.citri was significantly higher then perilla fruitescens.And the three others had no significant difference from the adults of E.nicholsi.The predatory number of E.nicholsi from Mentha haplocalyx.brip.and Fimiana simplex on mites nymphs were significantly higher than others,the second were the E.nicholsi from citrus and tea plant.However,there were no significant difference of the predatory amount on larvae of P.citri among the five treatments of the persistent predatory capacity on adults of P.citri,which indicated that there were no significant difference,although the tendency of the daily average predatory amount was slightly decreasing in the three days.It could be proved that there were different of the predatory capacity of E.nicholsi from different host plants on P.citri and the persistent predatory capacity on adults of P.citri were stable.