为有效地实施玉米害虫综合治理,明确玉米品种间的抗蚜性差异,筛选抗蚜性品种。在田间自然感虫状态下采用5点取样法记录玉米蚜在不同玉米品种上的为害状况, 对21个品种用蚜量比值法进行抗蚜性鉴定,并对用玉米蚜高峰期蚜量比值测定玉米抗蚜性进行可行性分析。结果表明,不同玉米品种抗蚜性差异较大,金西南8号和陇玉1号为高抗品种,桂单203、青青601、珍禾978、周玉913、贝玉10、普玉3号、水金玉8号、云合2号为易感品种,玉米蚜天敌数量与玉米蚜虫口数变化规律出现相对一致性,玉米品种的益害比与蚜量比值呈幂函数关系,益害比随蚜量比值的增大而减小。
英文摘要:
In order to effectively implement integrated management of maize pests, the difference of aphid resistance among maize varieties was clarified and aphid resistant varieties were screened. The damage status of maize aphids on different maize varieties was recorded by 5-point sampling method under the natural susceptibility condition in the field. The aphid resistance of 21 varieties was identified by aphid-to-aphid ratio method, and the feasibility of aphid-to-aphid resistance of maize was analyzed by aphid-to-aphid ratio in peak period. The results showed that there were significant differences in aphid resistance among different maize varieties. Guidan 203, Qingqing 601, Zhenhe 978, Zhouyu 913, Beiyu 10, Puyu 3, Shuijinyu 8 and Yunhe 2 were high resistant varieties. The number of natural enemies of maize aphids was consistent with the population of maize aphids. The ratio of benefit to harm of maize varieties to aphids was power function. The benefit-harm ratio decreased with the increase of aphid population ratio.
查看全文
;
