麦蚜在不同抗级小麦上刺吸行为的比较

应用EPG(E1ectrical Penetration Graph)技术记录了麦长管蚜Sitobion avenae F.及禾谷缢管蚜Rhopalosiphum padi L.在不同抗性级别的小麦品种(红芒红、小白冬麦、kok1679和L₁)上的取食行为。结果表明，麦蚜在参试品种上刺吸的各种特征波型基本相同，但其出现时间、重复出现的次数及历期长短存在差异，其中自开始记录至第一次出现E₁：波的时间及E₂。波历期比率可做为参试品种是否抗蚜的主要生理性指标。依据主要波型统计参数用聚类分析方法对参试品种抗蚜性进行分类，其结果与室内生命表参数研究及田间鉴定结果基本一致。本文还对EPG在抗性因子定位、抗蚜鉴定中作用及EPG记录的影响因素略作讨论。

A COMPARISON STUDY ON PENETRATIONBEHAVIOUR OF WHEAT APHIDS ON WHEAT CULTIVARSWITH DIFFERENT RESISTANT LEVELS

In this study, the stylet penetration behaviours of Sitobion avenae F. and Rhopalosiphum padi L. on wheat cultivars with different degrees of resistance were recorded with EPG (Electrical Penetration Graph) technique. Results showed the specific wave patterns of aphid penetration on the four tested cultivars (Hongmanghong, Xiaobaidongmei, kok-1679 and L₁) were almost similar, but there were differences in thestart time, repeats and duration. The time for the first appearance of E₁ N] and the rate of total duration of E₂ to total recording time (E₂ %) could be taken as the main physiological parameters aeeociated with the cultivars resistance. Based on the major wavepatterns' parameters, the cluster analysis was used to distigush resistant levels of the tested cultivars and the result was fit basically with the life table parameters in lab and the evaluation in field. In the end of this article, the possible location of the resistant factors, function in resisatant evaluation by EPG and factors affecting EPG recording were discussed briefly.