عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Greenbug Schizaphis graminum Rondani is one of the most important pests of grain, especially wheat, which plays an important role to transfer some of plant pathogenic viruses. In this research, the biological parameters of S. graminum on wheat cultivar (Roshan) and Lines (R1-3 and R2-23) were studied at 25±1˚C, 60±5% RH and a photoperiod of 16: 8h (L: D) in a growth chamber. No significant difference in mean generation time (T) of wheat aphid was observed on cultivar and lines studied; while other population growth parameters showed significant differences among three treatments. The intrinsic rate of increase (r), finite rate of increase (λ)and Net reproductive rate (R0) were 0.352 day-1, 1.422 day-1 and 41.24 female offspring on R2-23 line; 0.288 day-1, 1.334 day-1 and 22.20 female offspring on R1-3 line and 0.294 day-1, 1.342 day-1 and 27.5 female offspring on Roshan cultivar, respectively. Based on population growth parameters, it can be concluded that Roshan cultivar and R1-3 line compared with R2-23 line have Lower susceptibility to S. graminum.