R. C. Roark

Identifiers

Open LibraryOL2370630A

Top Subjects

Insecticides (10)
Bibliography (4)
Patents (2)
Botanical insecticides (2)
Daisies (1)
Pyrethrum (Insecticide) (1)
Aliphatic compounds (1)

Books by R. C. Roark

Total count: 16

The adulteration of insect powder with powdered daisy flowers (Chrysanthemum leucanthemum L.)

U.S. Dept. of Agriculture1919-01-01
Insect powder

1926-01-01
Tests of various aliphatic compounds as fumigants

U.S. Dept. of Agriculture1929-01-01
An index of patented mothproofing materials

1931-01-01
A digest of the literature of derris (deguelia) species used as insecticides, 1747-1931

U.S. Dept. of Agriculture1932-01-01
A bibliography of chloropicrin, 1848-1932

U.S. Dept. of Agriculture1934-01-01
Devil's shoestring (Cracca virginiana L.)a potential souce of rotenone an related insecticides

1934-01-01
A bibliography of chloropicrin, 1932-1934first supplement to U.S. Dept. Agr. misc. pub. 176

U.S.D.A.1935-01-01
Lonchocarpus species (Barbasco, Cube, Haiari, Nekoe, and Timbo) used as insecticides

U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations1936-01-01
List of publications of the Division on Insecticide Investigations, July 1, 1927, to June 30, 1937

1937-01-01
Lonchocarpus (Barbasco, Cube, and Timbo)a review of recent literature

U. S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations1938-01-01
The early history (1848-1918) of the use of Derris as an insecticide

1938-01-01
References to reviews and popular articles on Derris

U. S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations1938-01-01
Work of the Division of Insecticide Investigations, 1927-1939

The Bureau1940-01-01
A list of publications, on 2, 2-bis (parachlorophenyl)-1, 1, 1-trichloroethane (called DDT) from 1874 to April 30, 1944, inclusive

1944-01-01
A second digest of information on allethrin and related compounds

U.S. Dept. of Agriculture, Agricultural Research Service1955-01-01