Abstract: This paper studied the development duration,adult weight,and mean relative growth rate (MRGR) of aphid Schizapis graminum,and the specific genes expression in wheat variety 98-10-30 (Triticum aestivum) after treated with different elicitors.The results showed that needling penetration,aphid feeding and BTH application could shorten the development duration of the aphid and decrease its adult weight,but had no significant effect on aphid MRGR.Different elicitors induced different specific genes expression in quality and quantity.The mRNA of PDF1.2 was increased significantly after aphid feeding,while there was no expression after applying BTH.Aphid feeding and BTH application increased the mRNA of BGL2,but no expression was observed in the control and after needling penetration.The induced resistance had some effects on aphid growth and development,and the response induced by aphid feeding had some similarities but significant differences to that induced by mechanical wounding and BTH application.It could be concluded that the response of aphid to elicitors was a special resistance,and there existed some overlaps or differences between it and mechanical wounding and SAR (systemic acquired resistance).

Key words: Strawberry, Photosynthesis character, Shading