群居型、散居型意大利蝗形态特征的数量分析

意大利蝗Calliptamus italicus(L.)是新疆草原的主要危害害虫之一,为了从形态上精确区分群居型和散居型意大利蝗,本文用数值分类学的方法对两型成虫的10个形态指标和5个形态指标比值进行了数量分析.方差分析结果表明:两型成虫在所测量的10个形态指标上都存在着显著性差异(P＜0.05);形态指标比值中前翅长...

Numerical analyses on morphometrics gregarious and solitarious phase of Calliptamus italicus

Callipatamus italicus （L.）is one of the main pests in Xin Jiang’s grasslands.In order to distinguish the gregarious and solitary phases of this pest we used numerical taxonomy to analyse 10 of its morphometric and 5 of its morphological characters.Analysis of variance indicated that the gregarious and solitary phases differed significantly in all 10 morphometric characters （P0.05）,especially eleytron length（E）,femur length（F） and tibia length.With regard to the morphological characters,a significant difference was found in E/F ratio;the E/F ratios of the gregarious and solitary phase being 1.42-1.94 and 0.90-1.39,respectively.Hierarchical cluster analysis divided the sample into 4 groups： gregarious males,gregarious females,solitary males and solitary females.Principal component analysis revealed three principal components each explaining 82.96%、13.86% and 2.65% of the total variation,and collectively accounting for 99.48% of the total variation.The sequence picture of principal component analysis was based on the principal component score of the main morphometric character,which was consistent with the result of hierarchical cluster analysis.The results indicate that the gregarious and solitary phases of C.italicus can be reliably distinguished on the basis of quantitative characters.