RESISTANCE SCREENING AND EVALUATION OF FIVE WHEAT CULTIVARS (TRITICUM AESTIVUM) TO CEREAL APHID (SITOBION AVENAE) INFESTATION

Resistant variety screening is an effective method for the Sitobion avenae infestation management.The purpose of this study was to assess the potential resistance traits of five wheat cultivars against the S. avenae.The aphid quantity ratio (AQR) indicated that Jinmai No. 105 and Linhan No. 9 had high resistance against S. avenae compared with other cultivars.The immature developmental duration of Jinmai No. 105 were exponentially the highest in the first and second instar while were the lowest in the third and fourth instar compared with other cultivars.The findings also indicated that S. avenae reared on Changmai No. 6878 displayed the highest intrinsic rate of increase (0.16 d -1 ) while the lowest was recorded on the Jinmai No. 105 (0.04 d -1 ).The highest proteolytic activity was quantified in larvae that fed on the Changmai No. 6878 cultivars (2.11 U mg -1 ) while the lowest occurred in larvae feeding on the Jinmai No. 105 cultivars (0.36 U mg -1 ).Larvae fed on Jinmai No. 105 (0.86 U mg -1) and Linhan No.9 (0.42 U mg -1 ) cultivars exhibited the highest and lowest levels of amylolytic activity, respectively.These findings provide critical cues for screening and improving aphid resistant wheat varieties or breeding efforts that involve S. avenae management.