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Nitrogen fertilizer promotes the rice pest Nilaparvata lugens via impaired natural enemy, Anagrus flaveolus, performance

文献类型： 外文期刊

作者： Zhu, Pingyang 1 ; Zheng, Xusong 1 ; Xu, Hongxing 1 ; Johnson, Anne C. 2 ; Heong, Kong Luen 4 ; Gurr, Geoff M. 2 ; Lu, 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Qual & Safety Agroprod, 198 Shiqiao Rd, Hangzhou 310021, Peoples R China

2.Charles Sturt Univ, Graham Ctr, Orange, NSW 2800, Australia

3.Jinhua Plant Protect Stn, Jinhua 321017, Zhejiang, Peoples R China

4.Int Rice Res Inst, DAPO Box 7777, Manila, Philippines

5.Zhejiang Univ, Inst Insect Sci, Hangzhou 310058, Peoples R China

关键词： Biological control; Ecological fitness; Parasitism preference; Parasitic efficiency; Functional response

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：5.918； 五年影响因子：5.955 ）

ISSN： 1612-4758

年卷期： 2020 年 93 卷 2 期

页码：

收录情况： SCI

摘要： The application of nitrogen (N) fertilizers to agricultural crops is a common practice globally and a crucial component in the current levels of productivity. Excessive N use, however, is costly and damaging to ecosystems. It is recognized that overuse of N fertilizer can promote pest herbivores by enhancing host plant nutritional quality, but less is known of the effects of N on natural enemies of pests via improved quality and availability of prey, and how these may cascade to indirect effects on pests. Here, we explored the effects of N fertilizer on a key egg parasitiod of Nilaparvata lugens (Stal) (Hemiptera: Delphacidae) (brown planthopper, BPH). Application of N to rice plants significantly prolonged the development time of Anagrus flaveolus (Hymenoptera: Mymaridae), increased wing size and decreased fecundity of adult females. Importantly, N application to rice plants significantly decreased the per capita parasitism of BPH eggs by A. flaveolus. Utilizing planthopper prey on N-treated rice plants led to reduced searching efficiency of A. flaveolus. Ultimately, the strength of biological control exerted by A. flaveolus was negatively affected by nitrogen application under field conditions. Parasitoids were able to discriminate between BPH infested rice plants with different levels of nitrogen using visual plant cues. We conclude that N fertilizer use can have profound effects on natural enemy efficiency which potentially increase the dependence on insecticides, another potentially hazardous input.

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