Abstract:
To investigate the optimal tobacco host of
Myzus persicae (Sulzer), its individual development on different tobacco varieties and the developmental duration, population survival rate and fecundity of
M. persicae were analyzed. The life table parameters such as net reproductive rate (
R0), finite increase rate (
λ), intrinsic increase rate (
rm), mean generation time (
T), population doubling time (
t) were obtained, and the propagation quantity and the average reproduction of
M. persicae on different tobacco varieties were compared. The results showed that Xujin 4, Changbohuang 2248, Shuba 2129, Luositou 2474, Daliuye 2013, Dabaijin 599 and NC89 had the shortest seedling time (about 46 d). Qingsheng 2 and Gexin 1 had the longest seedling time (about 60 d). The developmental duration of nymph was the longest and the shortest on Changbohuang 2248 (7.91 d) and Dashuba 2141 (5.91 d), respectively. The generative phases of adult M. Persicae on Gexin 3, Zhongyan 100, Y106, Daliuye 2012 and Shuba 2129 were more than 12.00 d. The generation durations of Gexin 3 and Dabaijin 599 were the longest (24.60 d) and the shortest (12.42 d), respectively. The generation durations of Dabaijin 2505, Changbohuang 2248, Gexin 1, Shuba 2129, Luositou 2474 and Daliuye 2013 were around the average value (about 20 d). The reproduction quantity of single
M. persicae on different hosts was Qingsheng 2 > Luositou 2474 > Zhongyan 100 > Shuba 2129 > Shuba 2135 > 40, and that of the other tobacco varieties was less than 40. The
rm of
M. persicae in Daliuye 2012, Dashuba 2141, Qingsheng 2, Shuba 2129, Luositou 2474, Shuba 2135 and Zhongyan 100 was higher than that of the other tobacco varieties. In conclusion, with otherwise identical conditions,
M. persicae preferred feeding on Daliuye 2012, Dashuba 2141, Qingsheng 2, Shuba 2129, Shuba 2135, Luositou 2474 and Zhongyan 100. However, the propagation quantities of
M. persicae on Daliuye 2012, Dashuba 2141, Qingsheng 2 and Shuba 2135 were less. Therefore, Shuba 2129 and Luositou 2474 are most suitable for the propagation of
M. persicae among the 18 tobacco varieties studied.