论文部分内容阅读
1990—1992年进行了烟蚜在50个烟草品种上取食的r_m和排蜜量与田间蚜量之间关系的研究。结果表明:r_m的变化范围为0.102~0.498,烟蚜24小时的排蜜量变化范围为3.862~29.356mm~2/头,并由此说明烟草品种对烟蚜的抗性是由于降低了其净生殖率。r_m和排蜜量与田间蚜量有显著相关关系,因而可用排蜜量来作为烟草品种抗蚜性的一个鉴定指标。
In 1990-1992, the relationship between the r_m and the amount of nectar released on 50 tobacco cultivars and the amount of aphids in the field was studied. The results showed that the range of r_m varied from 0.102 to 0.498, and the change of honey aphid within 24 hours was 3.862 ~ 29.356mm ~ 2 / head, indicating that the resistance of tobacco varieties to Myzus persicae could be attributed to the decrease of net Reproductive rate. There was a significant correlation between the amount of r_m and the amount of excreted honey and the amount of aphids in the field. Therefore, it could be used as an identification index of resistance to aphids in tobacco varieties.