sorry, I didn't proofread well enough. "...removal of the suckers does not have much effect..."
Suckers are formed at the bottom of the stalk from the first through the 5th leaf.
Corn plants should be suckered to ensure a healthy single stalk, or at least that's what I was taught. Studies have shown that removal of the suckers or tillers (depending on your area) has much effect one way or another on the performance of a stalk of corn. I hope this answers your question.