桔小实蝇成虫对不同颜色和气味物质的趋性反应

Responsiveness of Bactrocera dorsalis(Hendel) Adult to Different Colours and Odorants

研究了不同颜色和气味物质对桔小实蝇(Bactrocera dorsalis Hendel)取食和产卵选择以及趋向行为的影响。结果表明:桔小实蝇成虫对绿色食物具有较强的取食趋性,橙色次之,对黄色和红色的食物趋性弱,同时,雌、雄虫之间对食物颜色的选择无明显差异;在黄、绿、白3种颜色中,桔小实蝇对黄色基质的产卵趋性最强,绿色次之,对白色基质的产卵趋性最弱;嗅觉实验结果中,桔小实蝇成虫对乙酸乙酯、蔗糖、蜂蜜和酵母的气味表现明显趋性,但对红糖气味无趋性反应;而乙酸对桔小实蝇成虫有明显驱避活性;而雌虫对这些物质的嗅觉反应敏感于雄虫。

Effects of different colours and odorants on oriental behavior of fruit fly, Bactrocera dorsdis, in feeding, oviposition and tropism respond, were studied . The results showed that the flies strongly preferred green food when they foraged. The orange food followed, the yellow and red food is the weakest. There were no significant differences between female and male flies in this experiment. Compared to white and green substrate,the yellow was the first choice for female flies when they laid eggs, and the green substrate fol- lowed. In the Y-tube olfactory test, Bactrocera dorsalis had obviously trends to the smell of ethyl acetate, sugar, honey and yeast extract, respectively. However, they had no significant trend to the smell of brown sugar, and were obviously repellent for acetic acid. In addition, the female flies displayed more sensitive than the male ones in the olfactory respond.