Rick, If your asking me, I don't do anything for root selection except trying to select varieties which have shown some natural resistance. I was expecting a lot of root knot evidence last fall when I pulled my dead plants after the first frost. It was not there. I finished the summer growing only Big Beef and Heatmaster. Their roots were in very good condition. This year, I am using an organic fungicide as a soil drench which is supposed to be effective for controlling plant fungus"s as well as providing some root knot protection.
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