macrocephalum (Asteraceae: Tageteae), similar symptoms were encountered but it is considered unlikely that these were caused by C. In some cases, and in particular on Porophyllum ruderale subsp. reticulatus occurred on species other than C. reticulatus was abundant, indicated that no adult feeding damage, oviposition or galling identical to that caused by C. Field host-range surveys, conducted on 17 Asteraceae species at sites where C. These studies were followed by more detailed field and laboratory studies in Venezuela. odorata, with the exception of a few eggs laid on Ageratum conyzoides (Asteraceae: Eupatorieae).
Adult feeding or oviposition occurred only on C. reticulatus from Venezuela, using 25 species of Asteraceae and one of Amaranthaceae. Preliminary laboratory choice tests were conducted in South Africa on C. The Neotropical stem-galling weevil, Conotrachelus reticulatus (Coleoptera: Curculionidae), was considered for the biological control of the perennial shrub Chromolaena odorata (Asteraceae: Eupatorieae) in South Africa.
