APHIDS (HOMOPTERA, APHIDIDAE) COLONIZING PEACH IN THE UNITED-STATES OR WITH POTENTIAL FOR INTRODUCTION

Eleven aphid species known to colonize peaches in the United States an d one species not known from the United States are described and illus trated. Aphis spiraecola Patch, Brachycaudus helichrysi (Kaltenbach), Brachycaudus persicae (Passerini), Brachycaudus schwartzi (Borner), Hy alopterus pruni (Geoffroy), Hysteroneura setariae (Thomas), Macrosiphu m euphorbiae (Thomas), Myzus cerasi (F.), Myzus persicae (Sulzer), Myz us varians Davidson, Pterochloroides persicae (Cholodkovsky), and Rhop alosiphum nymphaeae (L.) are included in the present paper. A brief su mmary of taxonomic characters, usual hosts, and distribution within th e United States are given for each species. Pictorial and dichotomous keys are included to aid personnel charged with detection, identificat ion, and control of aphids associated with peaches in the United State s.