中国生物防治学报Issue(2)：183-187,5.
不同农业措施对玉米截形叶螨及其天敌塔六点蓟马发生的影响
Influence of Agricultural Practice on Occurrence of Leaf Spider Mite and Its Natural Enemy in Corn Field
摘要
Abstract
Field experiments were conducted to determine effects of agricultural practices on occurrence of the spider mite Tetranychus truncates Ehara and its natural enemy Scolothrips takahashii Priesener in Zhuozhou city, Hebei province in 2012. Six treatments were set up, including three sowing dates (April 25, May 7, May 18) and three cropping systems (corn-pumpkin intercropping, corn with no-weeding, and control), to investigate population dynamics of the mite and its natural enemy. Results showed that sowing dates had a significant effect on the occurrence of T. truncates and S. takahashii, the peak number of leaf mites from high to low was April 25 (81.48 heads/plant) >May 7 (20.24 heads/plant)>May 18 (5.32 heads/plant), and the population size of S. takahashii was ranked as April 25 (4.96 heads/plant)>May 7 (3.20 heads/plant)>May 18 (2.36 heads/plant). Cropping system also had significant effects on the occurrence of T. truncates and S. takahashii, the peak number of leaf mites from high to low was corn-pumpkin intercropping (83.20 heads/plant) >CK (81.48 heads/plant) >corn with no-weeding (16.60 heads/plant), and that of S. takahashii was corn-pumpkin intercropping (4.96 heads/plant)=CK (4.96 heads/plant) >corn with no-weeding (1.62 heads/plant). Late sowing harbored higher ratio of natural enemy to the leaf mite, and thus conferred better control of the spider mite. Compared among the three cropping systems, the treatment with weeds left had higher ratio of natural enemy to pest and also showed a better control of the spider mite.关键词
截形叶螨/塔六点蓟马/农事措施/播期/益害比Key words
Tetranychus truncates/Scolothrips takahashii/agricultural control/sowing dates/ratio of natural enemy to pest分类
农业科技引用本文复制引用
祖恒,徐前,秦玉川..不同农业措施对玉米截形叶螨及其天敌塔六点蓟马发生的影响[J].中国生物防治学报,2014,(2):183-187,5.基金项目
国家公益性行业（农业）科研专项 （）
