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日光温室条件下,将番茄、甘蓝、棉花、茄子、黄瓜5种寄主植物两两组合,研究丽蚜小蜂Encarsia formosa对组合后寄主植物上烟粉虱若虫的寄生率。结果表明,丽蚜小蜂对番茄与黄瓜、甘蓝与黄瓜组合后的黄瓜上烟粉虱若虫寄生率分别是37.60%、34.60%,显著高于单种黄瓜上的寄生率28.00%;对两种组合中番茄上烟粉虱的寄生率为45.34%(单种)和46.20%(组合),甘蓝上的寄生率为35.38%(单种)和36.40%(组合),差异不显著。其他8组组合中寄主植物上的寄生率间均差异不显著,即寄主植物组合对丽蚜小蜂的寄生影响不大。但无论是寄主植物单种还是寄主植物组合混种对丽蚜小蜂的羽化率都没有显著影响。
In the greenhouse, the host plants of tomato, cabbage, cotton, eggplant and cucumber were combined with each other to study the parasitism of Encarsia formosa on the host plants of B. tabaci. The results showed that the parasitism rates of Bemisia tabaci were 37.60% and 34.60% on the cucumber in combination with tomato, cucumber and cabbage and cucumber respectively, significantly higher than the parasitism rate of 28.00% on single cucumber; The parasitism rate of B. tabaci on tomato was 45.34% (single species) and 46.20% (combination). The parasitism rates on cabbage were 35.38% (single species) and 36.40% (combination), respectively, with no significant difference. There was no significant difference in the parasitism rate of the host plants among the other 8 groups, ie, the host plant combination had little effect on the parasitism of the Lepidoptera. However, no matter whether the host plant or the host plant mixture intermixed had no significant effect on the emergence rate of Lepidoptera.