数字农科院2.0

Pieris rapae larvae facilitate the oviposition of Plutella xylostella by spinning silk on waxy host plants

文献类型： 外文期刊

作者： Zhu, Jing-Yun;Xiang, Zhong-Wen;Yu, Wen-Yuan;Wang, Wen-Wen;Liu, Tong-Xian;Zhang, Shi-Ze

作者机构：

关键词： Diamondback moth;Small cabbage white butterfly;Chinese kale;cabbage;plant-insect interactions

期刊名称： ENTOMOLOGIA GENERALIS

ISSN： 0171-8177

年卷期： 2022 年

页码：

收录情况： SCIE（2022版）

摘要： The diamondback moth (DBM), Plutella xylostella (Lepidoptera: Plutellidae), and Pieris rapae (Lepidoptera: Pieridae), are two of the most destructive pests of cruciferous vegetables, and they are known to occur on the same plant simultaneously. Previous studies have shown that compared to healthy cabbage plants, cabbage plants damaged by P. rapae larvae are more attractive to P. xylostella for oviposition. However, to date, the reason for this is still unclear. We hypothesized that the silk vomited by P. rapae larvae are helpful to the oviposition of P. xylostella adults. In the present study, we found that P. xylostella laid more eggs on waxy plants pre-infested by P. rapae larvae, namely cabbage (Brassica oleracea) and Chinese kale (Brassica oleracea var. alboglabra), than on healthy plants, and they laid most of the eggs on the silk produced by P. rapae larvae. However, in the waxless edible rape (Brassica campestris), P. xylostella did not show a significant preference for oviposition between healthy leaves and those pre-infested with P. rapae larvae. Furthermore, in Chinese kale or cabbage plants pre-infested by P. rapae larvae, the number of P. xylostella eggs on the leaves without silk was significantly lower than that on the leaves with silk, and more P. xylostella eggs were laid on the larval silk than on the blank area of their leaves. The present study highlighted the important role of the silk of lepidopterous larvae in P. xylostella oviposition on waxy host plants. Our findings provided new insights into plant-insect interactions.

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