沈阳地区花生田苗期蛴螬危害损失及防治指标  

Damage and economic threshold of Holotrichia diomphalia larvae in seedling stage of peanut field in Shenyang

作　　者：钟涛[1] 许国庆[1] 徐蕾[1] 赵彤华[1] 王哲[1] 

机构地区：[1]辽宁省农业科学院植物保护研究所,辽宁沈阳110161

出　　处：《中国油料作物学报》2016年第5期640-643,共4页Chinese Journal of Oil Crop Sciences

基　　金：国家公益性行业(农业)科研专项(201003025);国家现代农业产业技术体系辽宁省花生产业创新团队建设项目(辽财指企[2010]717号)

摘　　要：为研究沈阳地区不同虫口密度下的蛴螬危害损失,在大田条件下以东北大黑鳃金龟3龄幼虫为试虫,采用人工接虫的方法,研究蛴螬虫口密度与花生产量之间的关系。结果表明,蛴螬的虫口密度(x)与花生产量(y)存在线性相关(y=-8.315x+417.87),相关系数r=0.996,二者相关性极显著。田间每1m2面积上每增加1头蛴螬时,花生产量损失约增加8.315g,产量损失率为1.99%。根据防治的直接收益不低于防治成本原则,确定了沈阳地区花生田东北大黑鳃金龟3龄幼虫的防治指标为1.98头/m2。To survey the damage of peanut field by Holotrichia diomphalia Bates and to development an economic threshold for pest management in Shenyang district,the third instar of H. diomphalia larvae with different population dendsity were inoculated in the peanut field,and the relationship between peanut yield and density of larvae was investigated. The results showed that the peanut yields gradually decreased with the increased population density of grubs. Their linear euqation was y = 8. 315 x ＋ 417. 87 with the correlation coefficient of 0. 996,which showed significant differences,y was the yield of peanut,x represented the population density. With each grub added,the yield loss was 8. 315 g and the yield loss rate was 1. 99%. The economic threshold of the third instar of H. diomphalia lavae in the peanut field was 1. 98 heads per square meter around Shenyang district.

关 键 词：沈阳地区 花生田 蛴螬 东北大黑鳃金龟 防治指标 

分 类 号：S435.652[农业科学—农业昆虫与害虫防治]