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首页> 外文期刊>Journal of Economic Entomology >Evaluating Action Thresholds for Amrasca devastans (Hemiptera: Cicadellidae) Management on Transgenic and Conventional Cotton Across Multiple Planting Dates
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Evaluating Action Thresholds for Amrasca devastans (Hemiptera: Cicadellidae) Management on Transgenic and Conventional Cotton Across Multiple Planting Dates

机译:在多种植日期评估氨玉米症(Hemiptera:Cicadellidae)管理的疫苗(Hemiptera:cicadellidae)管理的作用阈值

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An action threshold (AT) based on the specific pest-crop relationship is an important element of integrated pest management (IPM) programs. We evaluated planting time-based ATs to manage a sucking pest, cotton leafhopper (Amrasca devastans; Hemiptera: Cicadellidae) in conventional (CIM-554) and transgenic (Bt.CIM-599) cotton cultivars under field conditions. Cultivars were planted on 15 March, April, and May during 2011 and 2012. Only two ATs (0.1 and 1.0 A. devastans per leaf) and an untreated control could be tested on 15 March planted cotton, as the populations of A. devastans never reached a density of two per leaf. Cotton planted on 15 March had the highest seed cotton yield, highest net and marginal rate of returns (MRRs) than other planting times. At this planting time, only one insecticidal application was needed at an AT of 1.0 A. devastans per leaf, with no significant yield loss. Four ATs (0.1, 1.0, 2.0, and 3.0 A. devastans per leaf) and an untreated control were tested for cotton planted on 15 April and 15 May. For the 15 April planting, 2.0 AT led to 3 applications as compared with 10 applications needed with 0.1 AT; without any significant yield loss, generating the highest net return and MRR for this planting date.The 15 May planting was more vulnerable to A. devastans damage and 1.0 AT generated the highest net return and MRR with four applications as compared with all other ATs.These results suggest that the use of planting time-based ATs can improve cotton yield through cost-effective applications of insecticides.
机译:基于特定害虫作物关系的动作阈值(AT)是综合害虫管理(IPM)程序的重要因素。我们在常规(CIM-554)和转基因(BT.CIM-599)棉品种下,评估了种植时间的ATS以管理吸吮害虫,棉花植物(Amrasca Devastans; Hemiptera:Cicadellidae)在现场条件下进行棉花品种。在2011年3月15日,在2011年和2012年,在2011年和2012年5月15日种植了品种。只有两只ATS(每叶0.1和1.0A,0.1和1.0 A.每叶末端)和未处理的对照可以在3月15日种植的棉花上进行测试,因为A. Devastans的人口永远不会达到每片叶子的密度。 3月15日种植的棉花产量最高,净额最高,返回的边际率(MRRS)比其他种植时间。在这种种植时间,每叶的1.0A件末端只需要一种杀虫剂应用,没有显着的产量损失。 4月15日和5月15日,测试了四分之一ATS(0.1,1.0,2.0和3.0 A.每叶片)和未处理的对照。对于4月15日的种植,2.0在LED到3个应用程序,与0.1 at需要的10个应用相比;没有任何显着的产量损失,为此种植日发电最高的净返回和MRR。5月15日可能更容易受到A. Devastans损坏和1.0在所有其他ATS相比之下产生的最高净返回和MRR。这些结果表明,通过杀虫剂的经济高效应用,使用种植时间的ATS可以提高棉花产量。

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