The New Encyclopædia Britannica, Volume 16Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 887
... plants on healthy plants . Natural grafting and transmission are possible by root grafts and with dodder ( Cuscuta species ) . Vegetative propagation often spreads plant viruses . Fifty to 60 viruses are transmitted in seed , and a few ...
... plants on healthy plants . Natural grafting and transmission are possible by root grafts and with dodder ( Cuscuta species ) . Vegetative propagation often spreads plant viruses . Fifty to 60 viruses are transmitted in seed , and a few ...
Page 889
... plant disease infect over 150 different genera of higher plants in more than 50 families . Bacterial diseases can be grouped into three categories : wilting , necrosis , and overgrowth , or hypertrophy . Wilting results from invasion of ...
... plant disease infect over 150 different genera of higher plants in more than 50 families . Bacterial diseases can be grouped into three categories : wilting , necrosis , and overgrowth , or hypertrophy . Wilting results from invasion of ...
Page 896
... Plant Disease ( 1967 ) , a discussion of key biochemical and physiological processes that occur in the healthy plant and how these pro- cesses are disturbed ; G.H. HEPTING , Diseases of Forest and Shade Trees of the United States ( 1971 ) ...
... Plant Disease ( 1967 ) , a discussion of key biochemical and physiological processes that occur in the healthy plant and how these pro- cesses are disturbed ; G.H. HEPTING , Diseases of Forest and Shade Trees of the United States ( 1971 ) ...
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