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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度(E)与后足股节长度(F)比值E/F在两型成虫之间也存在显著性差异(P<0.05),其中群居型E/F比值在1.42～1.94之间,散居型E/F比值在0.90～1.39之间。聚类分析根据型态和性别将样本分为4组,第Ⅰ组是群居型雄性意大利蝗、第Ⅱ组为群居型雌性意大利蝗、第III组为散居型雄性意大利蝗、第Ⅳ组是散居型雌性意大利蝗。主成分分析构建了3个反映形态特征及其比值信息的综合指标,主成分1、主成分2和主成分3,三者的贡献率分别为82.96%、13.86%、2.65%,3个主成分的累积贡献率为99.48%。主成分进一步确定了E/F比值在两型区分上的重要作用,推断E/F比值可以作为群居型、散居型意大利蝗成虫的判定指标。
Calliptamus italicus (L.) is one of the major pests of grassland in Xinjiang. In order to distinguish the gregarious and scattered Italian locusts from the morphological accuracy, ten taxonomic indicators A number of morphological indicators were quantitative analysis. Analysis of variance showed that there were significant differences (P <0.05) between the two morphological indexes of the two adult adults and the ratio of the forewing length (E) to the hindquarter length (F) F also had significant difference (P <0.05) between two types of adults, among which the community E / F ratio ranged from 1.42 to 1.94, and the diaspora E / F ratio ranged from 0.90 to 1.39. Cluster analysis divided the samples into four groups based on their genders and genders. Group I was a group-type male Italian locust, Group II was a group-type female Italian locust, Group III was a diaspore male Italian locust, Group IV was a diaspore Female Italian locust. The principal component analysis constructed three comprehensive indicators reflecting the morphological characteristics and their ratio information. The principal components 1, 2 and 3 were 82.96%, 13.86%, 2.65%, respectively. The three principal components The cumulative contribution rate was 99.48%. The principal component further confirmed the important role of E / F ratio in the distinction between two types. It is inferred that the E / F ratio can be used as the index for judging the adult locusts.