Comparing the Impact of a Neonicotinoid and Biorational Agroneem on Herbivorous and Beneficial Arthropods on Cowpea and Tomato

作     者：Jude Akamu Ewunkem Louis Ernest Ndiva Jackai Henry Osofuhene-Sintim Beatrice Nuck Dingha 

作者机构：Department of Natural Resources and Environmental Design North Carolina A & T State University Greensboro 27411 NC USA Department of Family and Consumer Sciences North Carolina A & T State University Greensboro27411 NC USA 

出 版 物：《Journal of Agricultural Science and Technology(A)》 (农业科学与技术（A）)

年 卷 期：2014年第4卷第7期

页      面：585-596页

学科分类：09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

主　　题：Neonicotinoid biorational insecticide imidacloprid thiamethoxam cowpea tomato. 

摘      要：Cowpea （Vigna unguiculata L. Walp.） and tomato （Lycopersicum esculentum L. Karst） are attacked by a wide range of insect pests worldwide. In many cases, pesticides are used to control the pests. In 2010 and 2011, we conducted field experiments to evaluate and compare the effectiveness of a biorational （Agroneem~） and conventional pesticide （imidacloprid or thiamethoxam） on insect pests of these crops. In the first year, two varieties of cowpea （Mississippi Silver and Pinkeye Purple Hull） and two of tomato （Mariana and German Johnson） were used; in the second year, the better performing of each group （Mississippi Silver and Mariana） were used for the study. A split-plot design with four replications in Year 1, and a randomized complete block design with six treatment combinations in Year 2. In the first year, both pesticide groups were applied following manufacturer＇s recommendation （10-14 d cycles）; and in the second year, the application of the pesticides was driven by economic thresholds level （ETL） of insect pests. The most prevalent species of insects recorded in both crops were in the families： Chrysomelidae, Pentatomidae, Cicadellidae, Vespidae, Sarcophagidae, Thripidae and Sphingidae. In both years, the diversity of insects on cowpea was greater than on tomato and more insects were observed in the second year compared to the first, despite the absence of significant difference （P 〉 0.05） between varieties in the treated plots. The yield of cowpea and tomato was comparable in all sprayed plots.