Potato scab is caused by bacteria that infect the potato and cause parts of the vegetable to turn from a delicious vegetable into a dry, corky substance that looks unpleasant and tastes worse. Once your garden is infected with potato scab, it can also affect carrots and other underground legumes. Preventing potato scab is far easier than trying to rid the soil of this problem once it has taken hold, so taking these simple inhibiting measures now can save you a great deal of time and trouble later on.
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