To manage Palmer amaranth weeds, growers must prevent the spread of the seed, or the weed; use multiple herbicide applications to control; and have a zero threshold of plants after control measures....More
Herbicide resistance doesn't develop overnight. By repeatedly applying the same herbicide or herbicides that use the same mode of action, weed resistance pressure increases. Farmers can take a proactive approach to weed management to tackle the weed resistance problem.
Long past are the days of tossing in a little crop oil or surfactant in a spray mix. Selecting the right adjuvant is increasingly important today. However, complex herbicide mixes to fight resistant weeds make proper adjuvant selection a critical part of a successful crop protection program....More
Simply adding micronutrients to your corn and soybean fertilizer program is not the answer, even with a good fertility base, says Matt Harbur, resource agronomist, Trupointe Co-op, Piqua, Ohio. And part of a complete program is picking genetics that respond to excellent fertility....More
For decades, applying lime to soils to adjust pH has been accepted practice. While a low pH can reduce corn or soybean yields by 40% or more, there’s a surprising shortage of recent research about how lime is tested and graded and what impact it actually has on soil pH and crop yield. These were among the issues raised at a recent conference of lime-industry representatives and USDA-ARS and Iowa State University (ISU) soil researchers. The answers could impact input costs and yields as well as nutrient-management effectiveness....More
“Many farmers don’t fertilize for sulfur and zinc. And many people don’t realize the season-long importance of phosphorus,” says Fred Below, a University of Illinois plant physiologist. In research conducted by Below and graduate student Ross Bender, extra P, S and Zn increased corn yields 8 to 10 bushels per acre in fields already supplied with a balanced high-yield fertility program.
Three key nutrients’ under-recognized importance – sulfur, zinc and the long-recognized standby, phosphorus – could limit corn yields from an otherwise well-fertilized corn crop, says University of Illinois Plant Physiologist Fred Below....More
Denny Friest has conducted dozens of trials since 2000, and takes on several new comparisons each year through a program with Iowa Soybean Association. Participating farmers work with researchers to design practical trials. Farmers across the state often conduct trials on similar topics, such as N fertilizer or fungicide performance, which enhances results’ reliability....More
With expanding herbicide and corn-rootworm trait resistance, why let fungicide resistance get a seat at the table? Fungicide resistance in corn has yet to be identified. Checking resistance at the gate makes good agronomic and economic sense....More
When choosing a spring application, growers should expect a residual herbicide to deliver several weeks of weed control, cover a broad spectrum of weeds, aid in resistance management and allow for crop rotation flexibility....More
"Insurance companies often have a pollution exclusion that they claim eliminates general liability and umbrella coverage for spray drift," warns Jean Sieler, Robison, Curphey & O'Connell, LLC. "Even if the policy covers drift via a specific rider, typically with a specific coverage limit, it may be an 'eroding' rider that allows them to deduct their legal costs."...More
Corn and soybean farmers test-drove several new herbicides over the rugged proving ground of the 2013 growing season. The new active ingredient pyroxasulfone appears in three new products: Zidua, Anthem and Fierce.
Consider a three-way look at your crop — from above and below and at ground level. That means a close-up look at plant roots and soil for clues to plant growth, plus aerial images to detect, confirm and define a problem....More
University of Illinois has received reports of corn yields of the outside 8 to 24 rows on the south or west edges of corn fields showing lower or much lower yields than corn farther into the field. Possible causes include application drift or weather....More
Take a post-harvest break from tillage to spend some valuable learning time next Tuesday and Thursday as Corn+Soybean Digest hosts two Nutrient Master Class meetings in Omaha, NE (Nov. 19) and Davenport, IA (Nov. 21). Co-sponsored with Wolf Trax, these complimentary, one-day events (breakfast and lunch included) will focus on fertilizer innovations and best management practices to maximize corn and soybean performance....More
I've written about the Mix Tank app before, and now they've released an update. If you haven't already downloaded the app, do it now. It's an easy-to-use tool for spray management and chemical applications....More
More adverse spring weather and the northern spread of herbicide-resistant marestail find more reduced-tillage farmers considering fall residual herbicide applications. “Fall applications have risen dramatically in the last few years and will continue to grow,” says Regan Wear, CHS agronomy manager in Shipman, Ill. “Erratic, wet, cold springs have narrowed the planting window and fueled interest in fall residual herbicide applications because they really sharpen up timing the following spring.”...More
Strong genetic potential and proven crop management practices are vital to making the most out of every acre. According to DuPont Pioneer agronomy experts, focusing on management practices this fall will help maximize potential in your fields next season....More
The updated tool offers users calculations based on tri-state fertilizer recommendations for corn, soybeans, wheat only, wheat for grain and straw, corn silage and alfalfa, says Greg LaBarge, an Ohio State University Extension field specialist and one of the leaders of Ohio State's Agronomic Crops Team. The team also includes scientists from the Ohio Agricultural Research and Development Center....More
You plan years ahead for crop rotation, fertilizer and machinery acquisitions. Since the rise of glyphosate-resistant weeds, you should be doing the same for your herbicide program, says Lisa Behnken, a Minnesota Extension crops specialist....More
Advances in soil-testing research have led Iowa State University Extension and Outreach agronomists to revise recommendations for phosphorus, potassium and lime. “Field research is conducted continuously to assure that nutrient management suggestions are up to date,” says Antonio Mallarino, an extension agronomist and professor of agronomy....More
The University of Illinois Extension has received many questions about applying herbicides post-harvest to control emerged marestail plants. Fall-applied herbicides often provide more effective and consistent control of emerged marestail as compared with spring-applied (i.e., burndown) herbicides, says Aaron Hager, weed specialist with U of IL Extension. Here are tips from the Extension service for fall-applying herbicide to control emerged marestail....More
With corn and soybean harvest underway in all major producing states, farmers are thinking about herbicide applications this fall. Aside from weed management, there are other factors to be considered when applying herbicide after harvest including: spring weather uncertainty, impact on soil conditions, pest interactions....More
Jim Goss isn’t ready to declare tissue tests obsolete. But if field trials of a new resin-based technology continue to pan out, he thinks he may have found a new early warning system to detect unexpected nutrient deficiencies early enough to prevent yield losses....More