Hopper Headache
There are a few bugs that are starting to become problematic in the area. Adult grasshoppers are now a concern in the western part of North Dakota. “They’ll move out of the wheat and other cereal crops and move to…
Articles tagged under: Red Sunflower Seed Weevil
Dramatic Weevil Problem
South Dakota experienced a large number of red sunflower seed weevils this past growing season. SDSU Extension Field Crop Entomologist Adam Varenhorst says weevil numbers were alarming. "Thresholds for sunflowers are four-to-six per head and in South Dakota we see…
Emergency Exemption Granted for Malathion
The emergency crisis exemption for malathion has been approved for red sunflower seed weevil control in South Dakota. South Dakota farmers have until August 31 to spray for the red sunflower seed weevil. The request was submitted due to the pyrethroid-resistance…
Weevils Pose a Threat to Sunflower Crop
NDSU Extension Entomologist Janet Knodel describes the Red Sunflower Seed Weevil as the most severe pest for sunflower growers this past year. "The larvae stage is causing the most damage by feeding on the kernels, usually damaging about one-third of…
Blooming Sunflowers Brings out Weevils
Red Sunflower seed weevils are active in South Dakota. South Dakota State University Extension Entomology Field Specialist Patrick Wagner says the pests are widespread. "Now that we're at full bloom, they're the most active." The weevil can be found on…
