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Articles by Jeff Gunsolus
Minnesota: Check Fields for Palmer Pigweed This Fall
The fall harvest season is a good time to look for the presence of Palmer amaranth. Palmer amaranth is on Minnesota’s prohibited noxious weed and seed list with the goal to eradicate Palmer amaranth before it becomes widely established. Palmer amaranth is on Minnesota’s prohibited noxious weed and seed list with the goal to eradicate Palmer amaranth before it becomes widely established.
Minnesota Alfalfa: Winterkill, Delayed Termination - Should I Consider Soybean?
Plans change. Perhaps you planned to terminate an alfalfa stand last fall but the weather made tillage impossible to complete. Or, the winter weather has severely damaged your alfalfa stand. In either situation, is planting soybean after alfalfa when it’s terminated in the spring a viable option? Spring termination of an alfalfa stand due to planned rotation or winter injury can increase the probability of volunteer alfalfa in the subsequent crop.
Minnesota: Palmer Pigweed - A Proactive Management Approach Is Key
Early detection and eradication of Palmer amaranth will pay you dividends in reduced management costs. Differentiating Palmer amaranth from the other common amaranth species is challenging. However, because Palmer amaranth and tall waterhemp are biologically similar, you can approach this challenge with the weed management tactics that you would use for effective tall waterhemp control.
Dealing with volunteer corn after the storms
Crops in our area were coming along pretty nicely until tornadoes and winds ripped through on Sept. 20. Soybeans are mostly OK, but the severe weather caused damage in corn fields. This “downed corn” causes a high potential for corn ears and kernels to be left in the field this fall. As a result, we expect a high occurrence of volunteer corn in these areas in 2019.Downed corn will definitely affect yield this year — some stalks are severely broken over, some are lodged, and some lost their ears.
Managing the potential for volunteer corn in 2019
Source: University of Minnesota Extension By Dave Nicolai, Liz Stahl and Jeff Gunsolus The 2018 corn growing season was challenging for Minnesota growers. Excessive precipitation in some areas of the state and dry conditions in others, along with wind storms and tornadoes, has taken its toll on consistency in corn yields. The weather, along with disease and the early dying of some corn hybrids, has led to limited stalk strength at harvest.
Minnesota: Reduce Your Chances for Volunteer Corn Next Season
The 2018 corn growing season was challenging for Minnesota growers. Excessive precipitation in some areas of the state and dry conditions in others, along with wind storms and tornadoes, has taken its toll on consistency in corn yields. The weather, along with disease and the early dying of some corn hybrids, has led to limited stalk strength at harvest.
Minnesota: Palmer Pigweed - Detection, Reporting - Timeliness Is Key
This fall, Palmer amaranth was discovered for the first time in soybean fields in Redwood and Jackson counties. In Redwood County, 1 female and 3 male plants were found and in Jackson County, 1 female plant was found. All plants were destroyed, no seed was discovered and no additional plants were found within a 5 mile radius. The seed source is under investigation but likely routes would include contaminated field equipment and water and manure transport.
Factors influencing dicamba volatility
Earlier Crop News articles focused on dicamba’s potential routes of injury, injury symptomology, soybean sensitivity and yield loss potential. In this article, I would like to explore in greater detail the factors that could contribute to dicamba volatility's role as a potential route of injury. I will be working off the assumption that the primary cause of dicamba volatility is due to degradation of the new dicamba formulations to dicamba acid, dicamba’s most volatile form.
Response Of Soybean Yield To Dicamba Exposure: A Research-Based Report
As you continue to assess and document the impact of dicamba injury on soybean yield, I thought it would be timely to make you aware of an excellent summary of Dr. Andy Robinson’s research conducted when he was a graduate student at Purdue University.
Assessing and documenting yield loss due to dicamba injury in soybean
As we enter August, the big unknown in fields presenting dicamba injury symptoms will be dicamba’s impact on soybean yield. Unfortunately, due to the sensitivity of non-Xtend soybeans to dicamba, injury symptoms are not reliable indicators of yield loss. The level of yield loss depends on exposure at vegetative or reproductive stage of growth, persistence of injury symptoms, and growing conditions post-exposure. Bruce PotterLeaf cupping symptoms of dicamba injury in soybean.
Q+A: Herbicide use with cover crops
As more farmers look to plant cover crops in their corn and soybean fields, the question “What should I do about my herbicide program?” often arises. There is not a one-size-fits-all answer to this question, and unfortunately there are many unknowns. One challenge when adding cover crops into a corn and soybean production system is that herbicides with residual activity may interfere with the establishment and growth of cover crops.
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