Showing results under subject: 'entomology'

The European elm scale (Gossyparia spuria (Modeer))

Author: Hopkins, A. D. (Andrew Delmar), - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1919
Abstract: no abstract

Brief information on scale insects on shade tree and hardy ornamentals and remedies employed against them

Author: Hopkins, A. D. (Andrew Delmar), - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1916
Abstract: no abstract

Directions for industrial use of aerosols

Author: Yeomans, A. H. (Alfred Henry), - United States. Entomology Research Division.
Publisher:Beltsville Md,US Dept of Agriculture, Agricultural Research Service 1960
Abstract: no abstract

A short discussion of some scales affecting shade trees and hardy shrubs

Author: Middleton, William. - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1934
Abstract: no abstract

Defoliation of evergreen trees

Author: Middleton, William. - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1924
Abstract: no abstract

Brief information on pine leaf scale and its control

Author: Hopkins, A. D. (Andrew Delmar), - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1916
Abstract: no abstract

A sampling fork for estimating populations of small arthropods

Author: Henderson, Charles F., - United States. Entomology Research Branch.
Publisher:Beltsville Md,US Dept of Agriculture, Agricultural Research Service 1956
Abstract: no abstract

Scale insects on shade trees and shrubs and remedies for them

Author: Hopkins, A. D. (Andrew Delmar), - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1919
Abstract: no abstract

Ants about shade and park trees and shrubs

Author: Middleton, William. - United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1923
Abstract: no abstract

A short discussion of some scales affecting shade trees and hardy shrubs

Author: United States. Bureau of Entomology. - United States. Bureau of Entomology and Plant Quarantine.
Publisher:Washington DC,US Department of Agriculture, Bureau of Entomology 1950
Abstract: no abstract
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