Crumbling Raspberries - Knowledgebase Question

New Ulm, MN
Question by risius
May 18, 1999
One end of our raspberry patch produces beautiful berries, but on the other end of the patch the berries bloom and ripen, but all turn crumbly. The plants all look healthy. What could be the cause of this?


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Answer from NGA
May 18, 1999

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Sounds suspiciously like Raspberry Streak. This problem, caused by tobacco streak virus, is generally a minor, but widespread disease. The most obvious symptom of the disease is numerous purplish streaks that appear on the lower parts of infected canes. Usually, the streaks are less than an inch long. Terminal leaves on infected canes are often hooked or recurved, twisted or rolled, and darker green than normal. Leaves on the lower positions of the cane may show yellowing along veins and mottling. Fruits on infected canes are smaller than normal, dull, seedy, and crumbly and lack flavor. The individual drupelets often ripen unevenly, giving the fruit a blotched appearance.
If the above symptoms describe your raspberry plants, you'll want to remove and destroy in affected plants so the problem doesn't spread to your entire raspberry patch.

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