In 1992, The sensitivity of aphids to eight uarieties of yellew sun-cured tobaccowas compared by using a life table study. The results show that the sensitivity of Xiao Hua-qing tabacco is significantly weak, whereas the parameters T,γm,λare nearly the same. Byway of contrast to NC-89 and NC-60,the sensitivity of Xiao Hua-ging is almost the sam...