Author · 1893
Walker, J. C.
Plant pathology.
Walker, J. C.
Plant pathology.
Plant pathology
Walker, J. C.
Plant pathology
Cabbage-seed treatment
Walker, J. C.
Cabbage-seed treatment
Seed treatment and rainfall in relation to the control of cabbage black-leg
Walker, J. C.
Seed treatment and rainfall in relation to the control of cabbage black-leg
Diseases of cabbage and related plants
Walker, J. C.
Diseases of cabbage and related plants
Diseases of vegetable crops.
Walker, J. C.
Diseases of vegetable crops.
Fusarium wilt of tomato.
Walker, J. C.
Fusarium wilt of tomato.
Onion diseases and their control
Walker, J. C.
Onion diseases and their control
Yellows-resistant cabbage varieties in the Danish Ballhead-Hollander group
Walker, J. C.
Yellows-resistant cabbage varieties in the Danish Ballhead-Hollander group
Yellows-resistant varieties of cabbage in the early and midseason roundhead groups
Walker, J. C.
Yellows-resistant varieties of cabbage in the early and midseason roundhead groups
Observations on the cultivation and diseases of cabbage and onions in Europe, 1922
Walker, J. C.
Observations on the cultivation and diseases of cabbage and onions in Europe, 1922
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