The main eating centre pests endangering apple is Carposina niponesis Wals. at Wang-dong gully experimental area in Changwu county,the next harm is Grapholitha motesta Busck.The beginning period of ripe pest is in the ten days of last May to first June, It breed two filialsper annum. The filials were excavated 6～10 days earlier at valley slope than at Yuan surface.The factors that effect disappear and increase of ripe pests are temperature,precipitation,differ-ent breed composition and effect of prevention and cured