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本文研究了桔小实蝇Bactrocera dorsalis(Hendel)与番石榴实蝇Bactrocera correcta(Bezzi)幼虫在实验室2种环境温度,4种寄主及5个虫口数量比例条件下的种间竞争现象。结果显示,在温度26℃以桃和香蕉为寄主条件下,桔小实蝇存活率高于番石榴实蝇;以芒果为寄主情况下两者存活率差异不显著;以番石榴作为寄主,虫口数量较大的一方具有竞争优势。在温度33℃条件下,就所测试的各种寄主,番石榴实蝇均具有竞争优势。分析发现,温度是影响番石榴实蝇幼虫存活率的关键环境因素;虫口比例对于桔小实蝇的存活率有重要影响;在不同的寄主中,桔小实蝇与番石榴实蝇的存活率也表现出较大的变化,寄主种类与温度及虫量形成综合效应,决定了桔小实蝇与番石榴实蝇竞争的最终结局。
In this paper, we studied the interspecific competition between Bactrocera dorsalis (Hendel) and Bactrocera correcta (Bezzi) larvae under two environmental temperatures, four hosts and five population numbers in the laboratory. The results showed that under the conditions of peach and banana as the host, the survival rate of the fruit fly was higher than that of the guava fruit fly at the temperature of 26 ℃, while the survival rate of the fruit fly was not significant under the condition of mango as the host. Guava was the host, A larger number has a competitive advantage. At temperatures of 33 ° C, all hosts tested, guava fruit fly had a competitive advantage. The results showed that the temperature was the key environmental factor affecting the survival rate of guava fruit fly larvae. The proportion of the insect population had an important influence on the survival rate of the fruit fly. The survival rates of the fruit fly and guava fruit fly Also showed a greater change, the host species and the temperature and the amount of insects formed a comprehensive effect, determines the fruit fly and fruit guava fruit fly competition final outcome.