Note on small red and green galls or swellings on upper surface of silver maple leaves.
United States. Bureau of Entomology and Plant Quarantine. Division of Forest Insect Investigations.
Beltsville, Maryland :United States Departmentof Agriculture, Bureau of Entomology and Plant Quarantine, Division of Forest Insect Investigations,1951.
"July 9, 1951."
Diseases and pests
NAL: A434 En832
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