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.
All Sunflower Content
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.
A guide of common stem diseases in sunflowers in South Dakota
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.
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.
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.
August 15, 2019
SDSU Extension will focus on production and marketing decisions at the August and September Ag Economic Dialogues.
August 12, 2019
SDSU Extension staff will be hosting several forums during Dakotafest 2019 held August 20-22 on the Schlaffman Farm near Mitchell, S.D., (2300 E Spruce Street) inside booth #600.
While scouting sunflower near Sturgis this week, we came across outbreak levels of checkerspot caterpillars that were defoliating the plants. Similar sightings have been reported throughout Western and Central South Dakota in recent weeks.