The Culture And Diseases of the Sweet Pea
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There seems no doubt that the Rhizoctonia root* rot of sweet peas is much more wide- spread than is reported. The nature of the trouble is unknown to the growers.
Outdoors, Rhizoctonia also attacks the gar- den pea, bean, lettuce, carrot, celery, cow peas, and a number of other hosts.
Symptoms. Severely infected plants have practically no root system (fig. 5) .
In slightly infected plants, only one or two rootlets may be destroyed. The fungus produces a browning effect of the root be- fore tota...l destruction sets in. In very ioo DISEASES OF THE SWEET PEA early stages of the disease infected seed- lings are seen to have a wilted appearance ; as the disease progresses they fall over and collapse. The fungus is not often con- fined to the roots alone. It frequently works its way up to the stem, producing a constricted area which marks it off from the healthy part above. The fungus being a soil organism is usually introduced with manure; infection may take place at any part of the roots, or at the lower end of the stem.
What to read after The Culture And Diseases of the Sweet Pea?
You can find similar books in the "Read Also" column, or choose other free books by Taubenhaus, Jacob Joseph, 1885- [from Old Catalog] to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
There seems no doubt that the Rhizoctonia root* rot of sweet peas is much more wide- spread than is reported. The nature of the trouble is unknown to the growers.
Outdoors, Rhizoctonia also attacks the gar- den pea, bean, lettuce, carrot, celery, cow peas, and a number of other hosts.
Symptoms. Severely infected plants have practically no root system (fig. 5) .
In slightly infected plants, only one or two rootlets may be destroyed. The fungus produces a browning effect of the root be- fore tota...l destruction sets in. In very ioo DISEASES OF THE SWEET PEA early stages of the disease infected seed- lings are seen to have a wilted appearance ; as the disease progresses they fall over and collapse. The fungus is not often con- fined to the roots alone. It frequently works its way up to the stem, producing a constricted area which marks it off from the healthy part above. The fungus being a soil organism is usually introduced with manure; infection may take place at any part of the roots, or at the lower end of the stem.
What to read after The Culture And Diseases of the Sweet Pea?
You can find similar books in the "Read Also" column, or choose other free books by Taubenhaus, Jacob Joseph, 1885- [from Old Catalog] to read onlineMoreLess
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