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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->2017年54 No.4

Indoor contact toxicity of three insecticides, and their mixtures, on eggs of oriental fruit moth, Grapholita molesta (Busck)
Author of the article:JIANG Jun-Xia1** ZHAO Yu-Yu2 GUO Li-Na2 ZHU Dian2 LI Yi-Ping2*** WU Jun-Xiang2***
Author's Workplace:1. Pesticide Management Accreditation Institute of Shaanxi Province, Shaanxi 710003, China; 2. State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, China
Key Words: Grapholita molesta (Busck), pesticides, egg, contact toxicity
Abstract:

 [Objectives]  To provide a theoretical foundation for controlling the oriental fruit moth Grapholita molesta (Busck) at the egg stage.  [Methods] Contact toxicities of three pesticides, including Spirotetramat, Abamectin and Beta-cypermethrin, as well as Abamectin-Spirotetramat and Beta-cypermethrin-Spirotetramat mixtures, on G. molesta eggs, were investigated using the dipping method in a laboratory. [Results]  240 mg×g1of Beta-cypermethrin was the most efficient pesticide regime for G. molesta eggs, achieving a corrected mortality rate of 96.42%. The next best were 120 mg×g1 and 60 mg×g1 of Beta-cypermethrin, and 96 mg×g1 of a 1︰2 mixture of Beta-cypermethrin and Spirotetramat, which had corrected mortality rates of 81.70%, 76.73% and 70.72%, respectively. The corrected mortality rates of all other treatments were < 70%. Corrected mortalities were all < 30% when Abamectin was used alone, or when it was mixed at a ratio of 1︰4 with Spirotetramat or Beta-cypermethrin-Spirotetramat, or 1︰3 with Beta-cypermethrin-Spirotetramat. [ConclusionBeta-cypermethrin, or a 1︰2 Beta-cypermethrin-Spirotetramat mixture, can be widely used to control of G. molesta eggs but Abamectin or Spirotetramat alone are ineffective for this purpose.

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