HPIPM:Sunflower Bud Moth

Author: Frank B. Peairs[1]

Field Biology and Identification

Adult sunflower bud moths, Suleima helianthana (Riley), have a wingspread of about 16 to 18 millimeters (5/8 inch). Each gray‑brown forewing has two dark transverse bands. The larva is cream colored with a brown head. Mature larvae are approximately 19 millimeters (3/4 inch) long. Overwintering pupae emerge into first generation adult moths in May to mid‑June, the second generation emerges in July or August. A few days after adult emergence, eggs are deposited on the terminals of immature sunflower or on the receptacle of mature sunflower. Larvae tunnel into the sunflower plant upon hatching.

Plant Response and Damage

Larvae from the first generation usually only damage terminals and stalks, whereas second generation larvae usually feed in the pith area of the head. Entrance holes are surrounded by black frass.

Management Approaches

Significant yield losses have not been demonstrated with this insect. Insecticide treatments are not considered necessary under most conditions.

The information herein is supplied with the understanding that no discrimination is intended and that listing of commercial products, necessary to this guide, implies no endorsement by the authors or the Extension Services of Nebraska, Colorado, Wyoming or Montana. Criticism of products or equipment not listed is neither implied nor intended. Due to constantly changing labels, laws and regulations, the Extension Services can assume no liability for the suggested use of chemicals contained herein. Pesticides must be applied legally complying with all label directions and precautions on the pesticide container and any supplemental labeling and rules of state and federal pesticide regulatory agencies. State rules and regulations and special pesticide use allowances may vary from state to state: contact your State Department of Agriculture for the rules, regulations and allowances applicable in your state and locality.