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 Sunflower Moth
Larva: Brown head capsule with alternate dark and light lines running longitudinally, 0.75 inch in length. Economic Threshold: 1 to 2 adults/5 plants at onset of bloom or within seven days of the adult moth's first appearance. Adults are migratory and usually appear in early to mid-July. Larvae tunnel in seeds from late July to late August. Scouting: Scouting is most accurate in the early morning or late evening, when moths are active. Common Errors: Waiting too long to spray during flowering is a common error. If populations are present, the decision to spray an insecticide should be made during R-5.1-5.3. Too often the applicator is delayed or weather conditions are not conducive for aerial application. A delay such as this can cause considerable loss. Avoid spraying during peak foraging activity of pollinators during mid-morning to late afternoon. Spraying during the heat of the day can also cause a reversion of the spray thus keeping it from penetrating the sunflower canopy. The best time to spray insecticide during hot weather is early evening. Photos: Visit the Photo Gallery. For further information, click on the links below. Another resource about Insects can be found in the Archive section of The Sunflower magazine. Source: NDSU Extension Bulletin 25 Sunflower Production Handbook, NDSU Extension Service, September 2007 and the High Plains Production Handbook June 2005.
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