Plants or Crops
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Gall Midge Larvae in Soybean Stems
Gall midge larvae were observed recently in soybean stems from a field in South Dakota. These insects were found under the epidermis of the stem that was slightly above the soil line.
Trade Impacts on Soybeans
Agricultural trade agreements were first established in the General Agreement on Tariffs and Trade (GATT), legal treaty signed initially by 23 nations in 1947. The purpose was to promote international trade by reducing barriers such as tariffs.
Application of Nitrogen Fertilizer in Soybeans
SDSU Extension conducted a study during the 2016 growing season at five Eastern South Dakota sites to evaluate the effects of added N fertilizer (as urea) on soybean yields.
Small red maggots under your soybean plants’ epidermis? We have answers.
In 2015, we received plant samples of soybean that had small red maggots under the epidermis. Now, in 2017, we are starting to receive reports of these same insects being found under the epidermis of soybean in different parts of South Dakota.
First Soybean Aphid Populations Detected in South Dakota
While scouting fields this week, we observed winged (alate) soybean aphids in Southeast South Dakota.
Soybean Investigations: Research on Your Farm Seeks Farmer Cooperators
SDSU Extension and the South Dakota Soybean Research and Promotion Council are seeking South Dakota Soybean Growers willing to participate in a farmer-led on-farm strip trial research program.
Overwintering S.D. Bean Leaf Beetles: 2017 predicted mortality
The overwintering generation of bean leaf beetle adults emerge in the spring and can cause serious defoliation injury to seedling soybean plants. However, the abundance of overwintering bean leaf beetles is negatively affected when the air temperatures get too cold. Therefore, an estimate of the emerging populations can be made based on how cold the winter was.
Soybean Production: Cost-effective pest management practices
Chemicals were one of the most expensive individual costs in soybean production, behind only to seed in the non-land cost category. The average cash-rent soybean production farms incurred a crop chemical cost of $39/ac in 2015, an 88% increase from 2010.
Late-Season Nitrogen For Soybean?
Some South Dakota soybean fields that were planted early and have had sufficient moisture have reached early pod setting stage (R3) and are looking good.
New Multi-State Extension Publication: Managing Insecticide-Resistant Soybean Aphids
The first pyrethroid resistant soybean aphids were reported in Minnesota in 2015. Since then, pyrethroid resistant soybean aphids have been reported in Iowa, North Dakota, and South Dakota. In an effort to address resistance, researchers from those states have put together a new extension publication.