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Control of silver-leaf disease on apple trees


Fruit Trees (4): 48-49
Control of silver-leaf disease on apple trees
Silver leaf (Chondrostereum purpureum), a serious disease of orchards in the Changjiang river valley and along the Yellow River, can be controlled to some extent by the following measures: (1) exposing the thick roots during the growing season within a circle of 1.5 m diameter from the trunk, spraying once with a dilute fungicide, dressing monthly with dilute fermented night soil, and earthing-up after leaf fall; (2) pruning away diseased branches and disinfecting the wounds; (3) peeling the trunk bark thoroughly while avoiding injury to the cambium during fine weather in May; (4) applying fertilizers in split doses in an N:P2O5:K2O ratio of 1-1.3:1:1-1.3 jin per 100 jin fruit, and regulating the yield at 1500 kg/mu in order to maintain tree vigour; and (6) injecting kasugamycin into the bark through three 10-cm-deep holes made with a hand drill. (1 jin = 0.5 kg, 1 mu = 0.067 ha.).


Accession: 001554750



Related references

Studies on the silver-leaf disease of apple trees (2). Further observation of the symptoms of apple trees inoculated with mycelia of Stereum purpureum. Annual Report of the Society of Plant Protection of North Japan (35): 68-69, 1984

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