My Sycamore tree keeps growing sprouts from the base of the tree. What can I put on it to keep them from?

growing? It has developed large knots that are producing the sprouts. Is there a sealer or chemical I could use?

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  1. My Sycamore tree keeps growing sprouts from the base of the tree. What can I put on it to keep them from?
  2. So do I need to have my sycamore cut down it’s about 70 feet tall,that is growing sprouts due to lightning
  3. How do you stop tree sprouts from growing all over the yard?