椰子木蛾的产卵节律及其对寄主植物的产卵选择性

【背景】椰子木蛾是近年来新入侵我国棕榈科植物的害虫,研究其产卵习性可为监测和防治该虫提供参考。【方法】在室内条件下,观察、记录了椰子木蛾雌成虫的产卵节律及其对不同寄主植物的产卵选择性。【结果】椰子木蛾最高日产卵量可达34.4粒·头-1,且主要集中在羽化后4 d内产卵,占总产卵量的54.1%;产卵活动主要发生在夜间23:00到次日8:00;在椰子、蒲葵、大王棕、槟榔和散尾葵等寄主植物上的产卵量无显著差异,为89.3~147.7粒·头-1,但产卵位置存在差别。【结论与意义】椰子木蛾雌成虫具有较强的繁殖能力和产卵节律性,且在不同寄主植物上的产卵量一致。

Oviposition rhythms of Opisina arenosella and its oviposition preferences on different host plants

Background] Opisina arenosella Walker is new invasive pest on palm plants that invaded China in recent years. Study on its oviposition can provide reference for monitoring and controlling this pest. Method] The oviposition rhythms of O. arenosella female adults and its oviposition preferences to different host plants were observed under indoor conditions. Result] The highest daily fecundity was 34.4 eggs/individual, and most eggs were laid in the 4 days after adult emergence, accounting for 54.1% of the total number of eggs laid. Females mainly laid eggs at night, between 23:00 and 8:00. There were no significant differences in fecundity on host plants Cocos nucifera, Livistona chinensis, Roystonea regia, Areca catechu and Chrysalidocarpus lutescens, from 89.3 eggs/ind. to 147.7 eggs/ind. We detected differences on the preferred egg sites on various host plants. Conclusion and significance] The adults of O. arenosella have a greater reproduction capacity and a stronger oviposition rhythms, and there is no obvious oviposition preference on different host plants.