Effect of waxes and waxless triticale genotypes on survival and fecundity of the cereal aphid species.

摘要

The chemical composition and structure of the surface wax mediate the plant attractiveness to pests. The population tests showed that the survival and fecundity of the grain aphid Sitobion avenae and bird cherry-oat aphid Rhopalosiphum padi on seedlings of the waxy triticale genotype was clearly reduced compared to the waxless one. The waxy triticale seedlings also caused reduction of other studied population parameters, such as mean relative growth rate and relative growth rate. In addition, S. avenae had significantly higher values of the studied population parameters than R. padi on the triticale seedlings. The results suggested that the waxy genotype RAH 122 was more resistant to the cereal aphids than the waxless line RAH 366.