About Elm leaf curl and woolly apple aphid

Orono :Maine Agricultural Experiment Station,1912. | U.S. Department of Agriculture, National Agricultural Library

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Elm leaf curl and woolly apple aphid

Orono :Maine Agricultural Experiment Station,1912. | U.S. Department of Agriculture, National Agricultural Library

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Orono :Maine Agricultural Experiment Station,1912. | U.S. Department of Agriculture, National Agricultural Library

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Facts from Wikidata (CC0).