. H i -- - J Fig. 9. Eoot rot caused by Rhizoctonia. (A) healthy. (B) diseased. the root before total destruction sets in. In very early stages of infec- tion the seedlings are seen to have a wilted appearance; as the disease progresses the infected seedlings fall over and collapse. The fungus is not often confined to the roots alone. It is often seen to work its way up the stem and this may produce a constricted area which marks it off from the healthy part. The fungus being a soil organism, it is usually introduced with manure; infection can take place at any part

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsweetpeas, bookyear19