Effect of some biological parameters of English grain aphid sitobion avenae (Hemiptera:Aphididae) on different wheat cultivars

Resistant varieties of wheat play a vital role in influencing development time, survival rate and fecundity of Sitobion avenae. The impact of certain wheat cultivars on developmental time, survival rate, reproductive rate and longevity and some biological parameters of English grain aphid were studied under laboratory condition (25 ± 1 °C, 65 ± 5 % relative humidity and photoperiod of 16 h light: 8 h dark), and randomly choose apterous aphids and reared on five wheat cultivars. The English grain aphid had a nymphal developmental time of 9.02, 8.17, 7.88, and 6.97 and 6.62 days for Vitorrio, Ceyhan-99, Pehlivan, Stendal and Şahinbey, respectively. The lower survival rates (percentage) of total immature stages were observed on Şahinbey cultivar. Mean longevity of adult female was observed 5.05, 5.63, 7.16, 7.81 and 8.095 days on cultivars Şahinbey, Stendal, Pehlivan, Ceyhan-99 and Vittorio, respectively. Mean fecundity was highest on Pehlivan (12.12 progeny/female) and was lowest on Şahinbey (8.38 progeny/female). The gross reproduction rate (GRR), net reproductive rate (Ro), intrinsic increase rate (rm) and generation time (To) were observed lower (10.55, 4.34, 0.143 and 10.26) on Şahinbey than of the other wheat cultivars. The present study revealed that Sitobion avenae feeding on Şahinbey cultivar showed significant biological parameters than those of the other cultivars in the study.