Using Chemical Agents to Prevent Diseases of Juglans regia Caused by Pestalotiopsis sp.

Diseases of Juglans regia caused by Pestalotiopsis sp. were the main factors on the development of walnut industry in Dali prefecture. By chemical prevention tests for three years in a row,results showed that it was effective to the diseases of Juglans regia caused by Pestalotiopsis sp. by using 1 500times liquid of 10% difenoconazole dispersible granule and 2 000 times liquid of 5% myclobutanil high permeability oil in the branches,leaves and nuts,without obvious differences. It was effective to the diseases by using 1 000 times liquid of 70% mildothane powder in the nuts,not well in the branches and leaves.

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