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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2014年51 No.2

Effectiveness of seven pesticides in controlling wheat blossom midge and wheat aphids
Author of the article:ZHANG Jian1** LIU Yang-Li2 TIAN Xu-Tao1 XU Ye3 CHENG Wei-Ning1***
Author's Workplace:1. Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling 712100, China; 2. Hu County Center of Agriculture Technique Extension, Hu County 710300, China;3. Plant Protection and Quarantine Station of Fuping County, Fuping 711700, China
Key Words:pesticides, wheat blossom midge, wheat aphids, control effect
Abstract:       [Objectives]  To determine the relative effectiveness of seven pesticides; 25% pymetrozine SC, 3% emamectin benzoate ME, 25% thiamethoxam WG, 14% Chlorantraniliprole·lambda-cyhalothrin ZC, 15% chlorpyrifos·beta-cypermethrin EC, 2.5% lambda cyhalothrin EW and 40% chlorpyrifos EC, in controlling wheat blossom midge and wheat aphids and to provide a scientific basis for the application of pesticides to control wheat pests. [Methods]  The seven insecticides were sprayed to investigate their effectiveness in controlling adults of the wheat blossom midge and wheat aphid, and lost yield from crop damage caused by wheat blossom midge larvae was evaluated from unwrapped, treated wheat ears. [Results]  All seven pesticides reduced the abundance of adult wheat blossom midges by > 90% on day 1 after spraying, and from 84.81%-93.93% on days 3-5 after spraying. Recovered wheat yield loss was > 76%. For wheat aphids, the effectiveness of all seven pesticides were > 75%, 80% and 85% on days 1, 3 and 5 after spraying, respectively. Of the seven pesticides 15% chlorpyrifos·beta-cypermethrin EC was the most effective, reducing the abundance of both pest species and recovering wheat yield loss by > 90%. 25% thiamethoxam WG and 40% chlorpyrifos EC were the second most effective, reducing the abundance of adult wheat blossom midges by > 90% on days 3-5 after spraying, and yield loss by > 88%. The effects of these pesticides on wheat aphid abundance were > 86% and 90% on days 3 and 5 after spraying, respectively. [Conclusion]  The effectiveness of the tested pesticides on wheat blossom midges and wheat aphids was significantly different (P0. 05) .Of the pesticides tested, 15% chlorpyrifos·beta-cypermethrin EC was the most effective in controlling both pest species.
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