颜色对苹果蠹蛾产卵选择性的影响

苹果蠹蛾Cydia pomonella Linne是为害苹果Malus pumila Mill.、梨Pyrus spp.、桃Amygdalus persica L.等仁果类和核果类果树的重要蛀果害虫之一.为明确寄主颜色在苹果蠹蛾产卵中的作用,本文研究了不同颜色对苹果蠹蛾雌成虫产卵选择性的影响.试验采用彩色硫酸纸模拟寄主...

Effect of colors on oviposition preference of codling moth, Cydia Pomonella Linne

The codling moth, Cydia pomonella Linne, is one of the key fruit-boring pests that damage Malus pumila Mill., Pyrus spp. and Amygdalus persica L. and other fruits. In order to determine the role of host color in attracting the oviposition of C. pomonella, the present study examined the effects of various colors on the oviposition preference. Colored tracing paper was used to represent different host colors, with white as the reference color C. pomonella adults were continuously raised on the substrates in different colors under laboratory conditions, and the oviposition rate and preference were estimated on the tracing paper with different colors. We found that the female started laying eggs two days after the eclosion. Oviposition rate varied with different colors, with significantly higher oviposition rate and a preference on pink (averaged as 35.0 eggs and 38.07%) than that of strawberry red (averaged as 5.1 eggs and 7.56%) and that of orange yellow (averaged as 3.5 eggs and 8.37%). The latter two colors appeared to show a repellent effect on the oviposition. The substrate color also had strong effects on the oviposition preference of female adults in different age. The female adults of 7-day old were observed to prefer the light green (68.31%) substrate, while the females of other ages were more attracted to the pink substrate with much more eggs laid by a single female on pink than on the other colors. Our study clearly demonstrated that the color of the host may play an important role in determining the oviposition choice of C. pomonella, and they prefer to lay eggs on the site in pink.