Root weevils and crown borers feed on the main roots and plant crown. Infested plants are weakened or killed. Certain mites find the dense crowns of plants ideal habitats. There they feed on the plant sap, causing stunting and distorted growth.
An insecticide labeled for use to control your plant's problem may be required. Rotate planting locations, and use pest-free planting stock. Maintain plant health and vigor.
