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Update on Sunflower Insect Pests (07/23/15)

Pheromone traps monitored by the IPM Survey scouts are capturing increasing numbers of banded sunflower moths (BSM) located in Cass and Foster Counties of North Dakota last week

Update on Sunflower Insect Pests

Pheromone traps monitored by the IPM Survey scouts are capturing increasing numbers of banded sunflower moths (BSM) located in Cass and Foster Counties of North Dakota last week (see map). See the NDSU Extension Crop & Pest Report #10 for scouting procedure for BSM eggs. For oilseed sunflowers, the current E.T. is 3-4 eggs per 6 bracts based on the $18.5 per cwt (market value), $8-10 per acre (insecticide application cost), and 18,000-22,000 plants per acre (plant population). For adult moths, the E.T. is one moth per 100 plants in oilseed sunflowers.

Sunflower moths were captured in the pheromone trap located in Richland County in SE, Foster County in Central, Ward and McHenry Counties in NC and Golden Valley County in SW (see map). So, it is widely distributed across most of the sunflower producing counties of North Dakota. However, trap numbers are low and below the E.T. of 28 moths per trap per week (or 4 moths per trap per day). Sunflower moth is migratory and will continue to be blown into North Dakota on southerly winds. Scout!

The USDA NASS reports that 8% of the sunflowers were blooming in North Dakota (USDA NASS News Release – July 20, 2015). Routine scouting is critical in these early blooming fields for insect pests.

ent.knodel.3.sunflower moth maps

Janet J. Knodel

Extension Entomologist

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