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United States. Bureau of Entomology and Plant Quarantine. Division of Forest Insect Investigations
5 works on record
Works

Note on small red and green galls or swellings on upper surface of silver maple leaves

The bagworm

Brief history of the Division of Forest Insect Investigations and its accomplishments

A ponderosa pine tree classification for use in determining susceptibility to bark-beetle attack
Control of Dutch elm disease and elm phloem necrosis
Control of Dutch elm disease and elm phloem necrosis