Sunflower XIV-2

Sunflower Bud Moth

Frank B. Peairs

Tortricidae

Field Biology and Identification

Adult sunflower bud moths 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.

Categories: Sunflower, Insects, Sunflower bud moth

Date: 3/2/2006