Commercial plantings of red raspberries in Minnesota were found to contain a large amount of mosaic infection according to a survey commenced in. 1923 and completed in 1924. An attempt to control this disease in the propagating stocks of red raspberries throughout the state was begun in July 1924. Very satisfactory results have been obtained indicating control by roguing is practicable provided that infected raspberries from which mosaic may be transmitted are not within twenty rods of the rogued planting. Plants of the Latham variety taken from 18 isolated plantings rogued in 1924 averaged only 1.3 per cent mosaic in 1925 out of 112,110 plants in 34 separate plantings. Plants of the Latham variety taken from plants in 33 separate plantings. Approximately 125 acres of red raspberries were rogued for the control of mosaic disease in propagating stocks during 1925.
Document Type: Research Article
Publication date: April 1, 1926
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