ABSTRACT
The mesophyll sucker Zygina rhamni, the phloem suckers Empoasca vitis and Stictocephala bisonia, which are all well known Homoptera Auchenorrhyncha owing to typical alterations caused to vine leaves, resulted efficiently controlled by the following natural enemies: the Mymarid Anagrus atomus, an egg-parasite both of Z. rhamni and E. vitis; the Dryinid Aphelopus atratus and the Pipunculid Chalarus sp. prope griseus, both adult-parasites of Z. rhamni; the Pipunculid Chalarus sp. prope spurius, an adult-parasite of E. vitis; the Mymarid Polynema striaticorne, an egg-parasite of S. bisonia. Among the five listed predators of the youngs of Z. rhamni and E. vitis, Chrysoperla carnea was noteworthy. Thanks to the astonishing activity of the egg-parasites and the additional benefit due to other natural enemies, the use of pesticides to control the three above mentioned Auchenorrhyncha is judged irrational.
