摘要
在被调查的上海城市绿地中,桔小实蝇主要危害桃、枣、柑桔、梨、香橼木瓜、石榴7种园林植物;桔小实蝇对这7种寄主的喜嗜程度顺序为:柑桔>桃>枣>梨>香橼>木瓜>石榴。该虫喜嗜偏软、偏黄、趋于成熟的果实。由于城市绿地中植物种类呈多样性,使得在同一绿地中,桔小实蝇的寄主就达3～4种之多,因而具备了桔小实蝇成虫可随不同寄主植物的成熟度,进行转移补充食料和产卵的条件,形成了转移危害的规律。
There are 7 main host plants of Baetrocera dorsalis （Hendel） （ Diptera： Tephritidae） in investigated Shanghai urban green space , as follows： Amygdalus persioa L. , Zizipbus jujube Mill. , Citrus L. , Pyrus L. , Citrus medica L. , Chaenomeles Lindl. , and Punica granatum L.. The preterence order of them is： Citrus L. 〉 Amygdalus persioa L. 〉 Ziziphus jujube Mill. 〉 Pyrus L. 〉 Citrus medica L. 〉 Chaenomeles Lindl. 〉 Punica granatum L. Bactrocera dorsalis （Hendel） （Diptera： Tephritidae） prefers the fruits which are softer, yellow and close to mature. Three to four plant species of the 7 host plants simultaneously exist in the same urban green space because of the diwersity of plans. Therefore, the adults of Bactrocera dorsalis （Hendel） （Diptera： Tephritidae） may inter - transfer for supplying food and spawing condition according to the maturity of different host plants . Further more, they formed a mechanism of transfering harm.
