棉铃虫蛹和成虫形态特征的数值分析

通过对棉铃虫Helicoverpa armigera(Hubner)及其近缘种的蛹和成虫进行了形态特征变异的数值分析，结果表明：棉铃虫种群内个体变异较大，但种群间相对分化较小，无明显的地理分化，也没有发现棉铃虫种群有稳定变异的地理特征；但发现雄性抱器冠的长、宽、抱器瓣长宽比及抱器瓣长与冠宽比4个特征与纬度有一定的相关性，其相关系数分别为：-0.612，-0.699，0.693和0.691。尽管如此，棉铃虫还是相对比较单一的一个种，而近缘种在阳茎刺和抱器瓣的形态及阳茎端囊上的大刺数等方面有明显而稳定的差异和间断。

NUMERICAL ANALYSIS OF MORPHOLOGICAL CHARACTERS IN THE PUPAE AND ADULTS OF COTTON BOLLWORM

The results of morphological comparisons and numerical analysis of morphological characters of cotton bollworm (CBW) Helicoverpa armigera and its sibling species indicated that there were evident variations among individuals in the same CBW population, but there were neither obvious geographic differentiations, nor stable varia-tions of geographic characteristics among different geographic populations. Nevertheless, there were significant correlations between the latitudes of CBW populations and their cucullus length, cucullus width, valve length/valve width, and valve length/cucullus width (_r=-0.612* ,-0.699*,0.693* and 0.691* , respectively). Even though,it should still be regarded that all the CBW populations in China belong to a single species, rather than different geographical species, by comparisons of CBW with orientaltobacco budworm and corn earworm which were obviously different from the former due to the morphological interruption.