00536nam a2200169Ia 4500001001000000003000500010008004100015010001100056040000900067100001700076245013300093260001800226500005900244650002300303650001900326650002100345Para_7312CHAP220125s1999    xx            000 0 und d  a206200  cCHAP  aZwick, R. W.  aProbloompetroleum oil aplications for delaying pear psilla (Homoptera :b Psyllidae) oviposition /c R. W. Zwick, P.H. Westigard  as.l. :b s.n.  aSobretiro de: The Canadian Entomologist, 110 (3), 1978  aControl de plagas   aPera x plagas  aPsylla pyricola