台湾稻螟对4种寄主植物的产卵选择性和取食选择性

Feeding and oviposition preferences of Chilo auricilius Dudgeon to four species of host plants

【目的】研究台湾稻螟(Chilo auricilius Dudgeon)在水稻、茭白、甘蔗和玉米4种寄主植物的产卵选择性和取食选择性,为台湾稻螟预测预报及防治提供科学依据。【方法】采用笼罩实验和圆盘法,分别测试台湾稻螟在4种寄主植物上的产卵选择和取食选择性。【结果】台湾稻螟在寄主植物水稻、茭白、甘蔗和玉米上的产卵选择率无显著差异(P>0.05),但其幼虫在水稻和茭白上的取食选择率(分别为29.0%和26.0%)显著高于甘蔗(20.0%)(P<0.05)。【结论】台湾稻螟对供试4种寄主植物的产卵选择性不明显,但其幼虫在4种植物间具有一定的取食选择性。

【Objective】In order to provide scientific basis for prediction and control of Chilo auricilius Dudgeon, the present experiment was conducted to investigate feeding and oviposition preference of C. auricilius Dudgeon to four species of host plants viz., rice, water-oat, sugarcane and maize. 【Method】Feeding and oviposition preferences of C. auricilius Dudgeon were studied by disk method and cage method, respectively. 【Result】The results showed that, there were nonsignificant differences between oviposition preference rates of C. auricilius Dudgeon to rice, water-oat, sugarcane and maize（P〉0.05）, however, the feeding preference rate of C. auricilius Dudgeon larvae to sugarcane（20.0%） was significantly less than those to rice（29.0%） and water-oat（26.0%）（P〈0.05）. 【Conclusion】There are non-significant differences between oviposition preferences of C. auricilius Dudgeon to four species of host plants, and C. auricilius Dudgeon larvae have a certain feeding preference to four species of host plants.