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Nitrogen fertilization of rice plants improves ecological fitness of an entomophagous predator but dampens its impact on prey, the rice brown planthopper, Nilaparvata lugens

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, State Key Lab Qual & Safety Agroprod, Inst Plant Protect & Microbiol, 198 Shigiao Rd, Hangzhou 310021, Zhejiang, 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, Zhejiang, Peoples R China

关键词： Nitrogenous fertilization; Predation preference; Predatory function; Ecological fitness

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： Nitrogen fertilizers are widely used to maximize crop productivity but are also known to benefit pest insects. Here we show that nitrogen not only increased the egg size of the key pest, brown planthopper (BPH), Nilaparvata lugens Stal, but also benefitted the predatory mirid bug, Cyrtorhinus lividipennis Reuter (Hemiptera: Miridae). Predator nymph survival and development rate, female adult weight, longevity and fecundity were all enhanced. Importantly, however, high nitrogen levels also extended the predator handling time (Th), reducing the number of prey eggs attacked per predator and signalling a weakening of top-down control. We conclude that nitrogen fertilizer can exacerbate pest impact by natural enemy-mediated effects in addition to previously reported direct effects on herbivores. Our results highlighted the need to moderate the use of nitrogen fertilizers to maintain effective biological control of these rice pests to reduce dependence on insecticides, another potentially hazardous input.

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