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Displaying items 61 - 70 of 838 start over

61. Biological studies on the leafhopper Empoasca fabae as a bean pest

Author:
DeLong, Dwight Moore, 1892
Subject:
Leafhoppers. , Beans -- Diseases and pests.
Physical description:
60 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

62. Biology and control of the black vine weevil

Author:
Smith, Floyd F. (Floyd Franklin), 1900
Subject:
Brachyrhinus.
Physical description:
46 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

63. Biology and control of the corn leaf aphid with special reference to the southwestern states

Author:
Wildermuth, V. L. (Lernon Leroy), 1885 , Walter, E. V.
Subject:
Corn -- Diseases and pests -- Southwestern States.
Physical description:
22 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

64. Biology and control of tree hoppers injurious to fruit trees in the Pacific Northwest

Author:
Yothers, M. A.
Subject:
Fruit -- Diseases and pests -- Northwestern States. , Treehoppers.
Physical description:
46 p., 8 p. of plates
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

65. Biology of Brachymeria fonscolombei (Dufour), a hymenopterous parasite of blowfly larvae

Author:
Roberts, Raiford A. (Raiford Ashley), 1903
Subject:
Parasitic insects. , Blowflies. , Host-parasite relationships.
Physical description:
22 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

66. Biology of some Japanese and Chosenese grub parasites (Scoliidae)

Author:
Clausen, Curtis P. (Curtis Paul), 1893 , Gardner, T. R. (Theodore Roosevelt), 1899 , Sato, Kaku.
Subject:
Parasitic insects -- Research -- Japan. , Parasitic insects -- Research -- Korea. , Host-parasite relationships.
Physical description:
27 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

67. Biology of the European red mite in the Pacific Northwest

Author:
Newcomer, E. J. (Erval Jackson), 1890 , Yothers, M. A.
Subject:
European red mite. , Fruit -- Diseases and pests -- Northwest, Pacific.
Physical description:
70 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

68. Biology of the pea weevil in the Pacific Northwest with suggestions for its control on seed peas

Author:
Larson, A. O. (Andrew Olof), 1887 , Brindley, T. A. (Tom Albert), 1906 , Hinman, F. G. (Frank Gerald), 1907
Subject:
Pea-weevil. , Peas -- Diseases and pests -- Northwestern States.
Physical description:
48 p.
Collection:
Organic Roots Collection
Series:
Technical bulletin.
Part Of:
Technical bulletin.

69. Birdsfoot trefoil and big trefoil

Author:
McKee, Roland, 1880 , Schoth, H. A. (Harry August), b. 1891 , USDA
Subject:
plant physiology , chemical composition , planting seed , sowing , harvesting , forage production , forage crops , seed crop production , pasture plants , Lotus corniculatus , Lotus uliginosus , Big trefoil. , Lotus corniculatus.
Physical description:
14 p.
Collection:
Organic Roots Collection
Series:
Circular
Part Of:
Circular

70. Birdsfoot trefoil and big trefoil

Author:
McKee, Roland , 1880- , Schoth, H. A. (Harry August) , b. 1891
Subject:
Big trefoil , Lotus corniculatus , plant physiology , chemical composition , planting seed , sowing , harvesting , forage production , forage crops , seed crop production , pasture plants , Lotus corniculatus , Lotus uliginosus
Physical description:
14 p. : ill. ; 24 cm.
Additional Author(s):
McKee, Roland , 1880-Schoth, H. A. (Harry August) , b. 1891
Collection:
Organic Roots Collection
Series:
Circular