Search
Alfalfa Weevil Activity Prediction Update: April 8, 2021
As the temperatures begin to warm up around South Dakota, it is important to remember that some insect pests are accumulating degree days. One of the insect pests that we use degree day models to monitor is the alfalfa weevil.
Alfalfa Weevil Activity Prediction Update: April 15, 2021
Due to the cooler temperatures, we didn’t accumulate a lot of degree days for alfalfa weevils during the last week. However, there are some areas in South Dakota where alfalfa weevils may be active.
Alfalfa Weevil Activity Prediction Update: April 22, 2021
It was another cool week without a lot of degree day accumulations. With warmer temperatures in the upcoming forecast, the need to scout for alfalfa weevil activity will increase.
Common Stalk Borer Activity Estimate: April 22, 2021
In its early vegetative growth stages, corn is susceptible to feeding by the common stalk borer. The hatching and movement of common stalk borer caterpillars can be estimated by using degree days.
Alfalfa Weevil Activity Prediction Update: April 29, 2021
With another warmer week in the forecast, the need to scout for alfalfa weevils continues. Based on current degree day accumulations, overwintering alfalfa weevil adult activity is likely throughout all of South Dakota.
Common Stalk Borer Activity Estimate: April 29, 2021
As temperatures continue to warm up, degree days are beginning to accumulate a little faster for common stalk borers. Most of South Dakota is still between conditions approaching egg hatch and egg hatch occurring.
Organic Herbicides: Garden and Flower Bed Weed Control
Many South Dakota homeowners do not want to use inorganic or synthetic herbicides due to potential health impacts. Organic herbicides can be a useful tool for weed control when combined with other management practices.
Check Your Bins This Spring
As it warms up this spring, don’t forget to check the bins. Grain bins work as solar heat collectors, and the grain inside of them may be much warmer than expected.
Crop Tolerance to Soil Herbicide Residual
Some herbicides can persist in soil, especially dry soil. Herbicide carryover could be an issue in 2021 across the state depending upon last year’s moisture levels and field conditions.
Wheat Streak Mosaic Developing in Winter Wheat Fields
A few winter wheat fields in central South Dakota have been found with wheat streak mosaic disease. Incidence of this disease varied from a few plants to large portions of the field with yellowing leaves.