Insect & Pests
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Home Horticulture Resources for Gardeners
Horticulture is the branch of plant agriculture dealing with garden crops. In addition to our website, there are many horticulture resources available on the web to provide research-based information to help every gardener succeed.
Integrating Precision Ag Tools for Smarter SCN Assessment and Management
Fact sheet on integrating Precision Ag tools for Soybean Cyst Nematode (SCN) assessment and management
Should I Spray for Soybean Aphids at the End of August?
Soybean aphid populations are persisting in many soybean fields throughout eastern South Dakota. In many cases, these soybean aphid populations are either at the 250 aphids per plant threshold, or very close.
Did Malathion Effectively Manage Your Red Sunflower Seed Weevils?
Now that the August 31 deadline for the application of products containing malathion for red sunflower seed weevil management has passed, it is time to determine if the product was effective. South Dakota State University entomologists have received varying reports on this topic.
West Nile Virus Update: September 3, 2025
As of August, the South Dakota Department of Health indicated that West Nile Virus positive mosquito pools have been detected in Beadle, Brookings, Brown, Codington, Hughes, Lincoln, and Minnehaha counties.
Mosquitos to Watch for in South Dakota
After many areas in South Dakota experienced heavy rainfalls, mosquitos are now a major issue. Learn which species are most common throughout the state and which carry the highest risk for West Nile Virus.
Army Cutworm Migration Swarms Detected in Western South Dakota
Mass populations of army cutworm moths are being reported to entomologists at South Dakota State University. Thus far, these migratory swarms have only been observed in far western South Dakota, particularly within the Black Hills.
Private Applicator Endorsements for M-44 Devices, Fumigants, and Aerial Applications
Recent changes to South Dakota private applicator pesticide regulations have impacted the requirements to use M-44 predator-control devices, fumigants, and to apply pesticides from aerial vehicles.
Monitor Soybean for Soybean Tentiform Leafminer
In 2022, researchers detected soybean tentiform leafminer in McCook, Minnehaha, and Moody counties in South Dakota. The extent of the distribution of this pest in South Dakota is unknown and is currently being investigated.
Western Bean Cutworms Detected in South Dakota Corn
Western bean cutworm caterpillars have been reported in South Dakota corn. This pest can cause yield loss by feeding on the tassels, silks, and ears. In addition, ear feeding activities increase the likelihood of secondary diseases and mold growth on the ear.