how to kill unwanted banana suckers
Instructions. Cut off any unwanted suckers or shoots that are growing from the root system using a sharp spade. Remove the sucker, then cut and gouge the remaining underground bud with the spade.If the internal bud is not killed, the sucker will regrow. Too many of these shoots can crowd plants and reduce productivity. Banana trees are somewhat sensitive to frost, which can cause roots to freeze. 2  Do not apply herbicide to tree roots of plants that you wish to retain, as the chemicals can seep into other parts of the banana.