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Sunflower

All Sunflower Content

sun rising over South Dakota field

South Dakota Pest Management Guides

The South Dakota Pest Management guides are now available for free. The guides offer recommendations for controlling weeds, insects, and diseases in a variety of South Dakota crops.

aerial view of South Dakota farm and surrounding land

Pest & Crop Newsletter

SDSU Extension publishes the South Dakota Pest & Crop Newsletter to provide growers, producers, crop consultants, and others involved in crop production with timely news pertinent to management of pests, diseases, and weeds in South Dakota.

a tractor in a field spraying soybeans

SDSU Extension to Hold Private Pesticide Applicator Trainings Across South Dakota

January 03, 2020

SDSU Extension will host private pesticide applicator trainings throughout South Dakota beginning in early January through March.

Chemical Safety, Cover Crops, Crop Treatments, Crop Management, Corn, Forage, Field Pea, Flax, Oats, Oilseed, Pulse Crops, Sorghum, Soybean, Sunflower, Wheat

a tractor in a field spraying soybeans
Jan 17

2020 Private Applicator Certification

SDSU Extension will host private pesticide applicator trainings throughout the southeast region of South Dakota beginning in early January through March.

Chemical Safety, Cover Crops, Crop Treatments, Crop Management, Corn, Forage, Field Pea, Flax, Oats, Oilseed, Pulse Crops, Sorghum, Soybean, Sunflower, Wheat

A hand examining a wheat plant in a wheat field

USDA to Collect Information on Small Grain Production in South Dakota

September 20, 2019

South Dakota will be one of 32 states taking part in a small grains survey conducted by the National Agricultural Statistics Service (NASS) of the United States Department of Agriculture this fall.

Wheat, Oats, Sorghum, Sunflower, Corn

sunflower field

An identification guide to Common Stem Diseases of Sunflower in South Dakota

A guide of common stem diseases in sunflowers in South Dakota

Symptoms of three emerging sunflower diseases. From the left: Bacterial Stem Rot, Sclerotinia Basal Rot, and Sunflower Rust.

Bacterial Stem Rot, Sclerotinia Basal Rot and Sunflower Rust Developing in Sunflower

Sunflower scouted this week in Brookings and Kingsbury counties were found with bacterial stem rot, Sclerotinia basal rot and sunflower rust. This area has had plenty of moisture, which favors several diseases to develop in sunflower.

Two sunflower seed weevils side-by-side. The weevil on the left is red and the weevil on the right is gray.

Differentiating Two Species of Sunflower Seed Weevils

While scouting sunflower, there are two types of seed weevils that you may encounter. They are the red sunflower seed weevil and the gray sunflower seed weevil. It is possible to observe both of these species on a single sunflower head.

Red-brown colored weevil with bent antennae originating on the elongated mouthparts.

Watch for Red Sunflower Seed Weevils

In South Dakota, sunflower flowering is well underway. That means it is time to start scouting fields for red sunflower seed weevils. During the last two years, red sunflower seed weevil populations have been higher than normal with areas that exceeded the thresholds by as many as 300-500 adults per sunflower head.