Insecticidal Control of Banded Sunflower Moth, Cochylis hospes (Lepidoptera: Cochylidae), Larvae at Different Sunflower Growth Stages and Dates of Planting in North Dakota

  title={Insecticidal Control of Banded Sunflower Moth, Cochylis hospes (Lepidoptera: Cochylidae), Larvae at Different Sunflower Growth Stages and Dates of Planting in North Dakota},
  author={Laurence D. Charlet and John D. Busacca},
  journal={Journal of Economic Entomology},
In 1983, both chlorpyrifos and fenvalerate applied at three different plant growth stages were effective in preventing sunflower yield loss caused by larval feeding of the banded sunflower moth (BSM), Cochylis hospes Walsingham. Chlorpyrifos and fenvalerate also significantly reduced the percentage of seeds (achenes) damaged by BSM at the R4 (ray flowers visible within the opening sunflower bud) and R4 + 1-week growth stages, but did not reduce damage when treatment occurred at the R4 + 2-week… 
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