Root knot lives in the soil and can survive on a number of weed and vegetable crops. Cereal rye should be shred and tilled into the soil 30 days before planting a spring crop. Q. My beans appear to be very healthy. However, in examining the root system, I find that the roots have small galls attached to them. These are nodules formed by nitrification bacteria.
All legumes have the ability to fix atmospheric nitrogen in their root system.
Do not confuse these nodules with knots caused by nematodes. The nodules, caused by nitrification bacteria, appear to be attached to the root system whereas knots caused by nematodes are enlarged areas of the root itself. Q. My bean leaves have large brown spots on them. The damage looks more severe near the soil. However, it is beginning to cover the plant.