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OCCURRENCE OF THE ELM LEAF BEETLE, GALERUCELLA XANTHOMELAENA (SCHR.), AT ST. CATHARINES, ONTARIO
Published online by Cambridge University Press: 31 May 2012
Extract
In July 11, 1945, in the city of St. Catharines, Ontario, while looking for some elm trees reported by Dutch elm disease scouts as being severely leaf-eaten, I found two white elms (Ulmus americana L.) carrying large numbers of coleopterous larvae which were at once taken to be referable to the elm leaf beetle, Galerucella xanthomelaena (Schr.)
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- Copyright © Entomological Society of Canada 1946