Wheat,Triticum aestivumL., is damaged by many insect pests includingSitobion avenae(Fabricius) (Hemiptera: Aphididae).Induced host-plant resistance is an important strategy to reduce damage of the cereal aphids. This study evaluated the effects ofwheat seed treated with biofertilizers (Biofarm and Probio96) and the leaves treated with micronutrients (Librel Zinc andα-Iron)on biological parameters of theS. avenaein greenhouse conditions. The treatments have effects in the secondary metabolites inwheat leaves. The higher phenol and anthocyanin contents of wheat leaves occur in Biofarm treatment (345.70 and 0.750 mg/mL,respectively). The lower fecundity ofS. avenae(5.33 offspring) occurs on plants treated with Biofarm treatment. The netreproductive rate of aphid fed on plants treated with different treatments changes from 1.63 to 29.56 offspring individual−1,with the lower and higher values on Biofarm and control treatments, respectively. The lower and higher values of intrinsic rate ofincrease (r) and finite rate of increase (λ)ofS. avenaeoccur on wheat treated with Biofarm (r=0.018,λ= 1.018 day−1)andcontrol (r= 0.148,λ= 1.016 day−1), respectively. The results indicate that treating seed with biofertilizers (Biofarm andProbio96) is an environmentally safe method and could be used to manageS. avenae.
