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Flower strips promote natural enemies, provide efficient aphid biocontrol, and reduce insecticide requirement in cotton crops

文献类型： 外文期刊

作者： Yang, Quanfeng 1 ; Li, Zhuo 2 ; Ouyang, Fang 1 ; Men, Xingyuan 3 ; Zhang, Kening 1 ; Liu, Min 5 ; Guo, Wei 5 ; Zhu, Chunguang 5 ; Zhao, Wenlu 6 ; Reddy, Gadi V. P. 7 ; Ge, Feng 1 ;

作者机构： 1.Inst Zool, Chinese Acad Sci, State Key Lab Integrated Management Pest & Rodents, Beijing 100085, Peoples R China

2.Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China

3.Shandong Acad Agr Sci, Inst Plant Protect, Shandong Prov Key Lab Plant Virol, Jinan 250100, Shandong, Peoples R China

4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China

5.Bur Agr & Rural Affairs Wucheng Cty, Dezhou 253000, Shandong, Peoples R China

6.Dezhou Acad Agr Sci, Dezhou 253000, Shandong, Peoples R China

7.USDA ARS, Southern Insect Management Res Unit, Box 346,141 Expt Stn Rd, Stoneville, MS 38776 USA

关键词： conservation biological control; pest; pesticide; predator

期刊名称：ENTOMOLOGIA GENERALIS （ 影响因子：6.608； 五年影响因子：4.803 ）

ISSN： 0171-8177

年卷期：

页码：

收录情况： SCI

摘要： Manipulating border flower strips is an effective method of conservation biological control , and can promote natural enemies and boost biocontrol services in agroecosystems. However, few studies have compared the effectiveness of flower strip establishment versus chemical control , and how far from border strips into fields does pest control remain efficient. We conducted a two-year experiment in cotton plots to compar e three pest management measures for cotton aphids in China: (1) sown border s of flower strips , (2) chemical control using imidacloprid with border flower strip replaced by a cotton strip, and (3) control treatment: no insecticide applications and border flower strip replaced by a cotton strip. We monitored the abundances of aphids and natural enemies in border strips and at different distances away from border strips into cotton plots. Abundances of cotton aphids' natural enemies including ladybeetles , predatory bugs, lacewings, and hoverflies were significantly higher in border flower strips than in border cotton strips. Importantly, aphid abundances were lower in cotton plots with flower strips than cotton plots treated chemically in 2020 , and about similar in 2021. They were also lower by 57 % and 34 % compared to the control plots in 2020 and 2021 , respectively . Moreover, efficient pest suppression in cotton plots with flower strips was achieved as far as 10.5-14.6 m away from the strip into the plots (the maximum distance sampled). Our study demonstrates a high degree of effectiveness of flower strips in promoting natural enemy abundances and aphid suppression, and reducing the need for insecticide use in cotton crops.

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