Zur Kenntnis von Hyperodes bonariensis Kuschel (Col., Curculionidae) und seiner Feinde in Argentinien

On the knowledge of Hyperodes bonariensis Kuschel (Col., Curculionidae) and its antagonists in ArgentinaStudies were made on damage ofHyperodes bonariensis as a pest of pasture plants and on incidence of its parasites and predators. Among its natural enemies,Patasson atomarius (Breth.) (Mymaridae, parasitic on eggs) appeared to be polyphagous, having a good potential rate of increase and substantical ecological tolerance and seemed to be a promising parasite.Sericophanes obscuricornis Popp. (Miridae),Nabis punctipennis Blanch. (Nabidae),Philonthus sp. (Staphylinidae) (predaceous on eggs),Pterostichus aereus (Dej.),Pt. unistriatus (Dej.),Barypus clivinoides Curt.,Cnemalobus gavi Putz.,Metius blandus (Dej.) andM. malachiticus (Dej.) (Carabidae, predaceous on adult weevils) destroyed the host to some extent, but they are not of much importance in regulating the population of this pest.