| biotypic and pest status differences between hungarian and south african populations of russian wheat aphid, diuraphis noxia (kurdjumov) (homoptera: aphididae). | russian wheat aphid, diuraphis noxia (kurdjumov) is a severe pest of cereals in south africa and in the usa. in order to reduce d noxia damage, intensive resistance breeding programs have been undertaken, resulting in d noxia-resistant cultivars that are now widely used in south africa and in the usa. however, there appear to be differences in the ability of different populations of d noxia to damage these resistant cereal cultivars. to determine whether different biotypes of d noxia are present ... | 2003 | 14561073 |