Antibiosis resistance to the aphid, Sitobion avenae F. (Homoptera: Aphididae) in different winter wheat cultivars

[摘要]  The nymphal survival rate; mean development time; adult fecundity (total number of progeny/female produced within the first 10 and 15 days of reproductive stage) and calculating the relevant intrinsic rate of natural population increase (rm value) was measured on five modern Iranian wheat cultivars at the tillering growth stage. The English grain aphid is regarded as one of the most important pests of small grain cereals, especially wheat varieties in many parts of the world. The pest has extended its distribution throughout the wheat fields of Iran and in particular the East Azarbaidjan province. The wheats were of Iranian origin, winter cultivars and hexaploid types, namely Alamoot, Alvand, Zarrin, Sabalan and Sardari, which are the most extensively cultivated in the province. The experiment was carried out under greenhouse conditions of 24.2±4.5°C temperature, 55.7±4.6%R.H. and 16:8(L: D) light regime. Aphids which had already been reared on the respective varieties for at least one generation were transferred to the experimental plants. The ANOVA of the data indicated that regarding duration of nymphal development time, adult fecundity and also rm values, there were significant differences (p

[学科分类] 昆虫学

[关键词] Antibiosis;Plant resistance;Sitobion avenae;wheat cultivars