Difficult to control weeds – whether due to herbicide resistance or cut rates or too tall weed height/maturity or all of the above – must be taken very seriously and moved to the top of your agronomy to-do list for 2014....More
There's a new weed identification mobile app available for download. The Ag Weed ID app offers an image library, as well as control measures for about 75 of the most common weeds in a variety of crops, including corn and soybeans.
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
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
Evaluating your farm’s sustainability and seeing how it stacks up against similar operations can be an eye-opener that helps improve a farm’s economic and environmental sustainability, says Shawn Conley, Extension soybean specialist at the University of Wisconsin-Madison....More
An article published in the recent issue of Weed Science showed that glyphosate-resistant Palmer amaranth weeds are strong, persistent plants due to amplification of the EPSPS gene. This means that glyphosate resistance will probably persist and farmers will be faced with finding different methods of removing Palmer amaranth from their fields....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.
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
An important component of managing weeds in field crops is preventing the seeds released by weeds each autumn from becoming new plants. Nature assists in the loss of weed seed through predation, decay and loss of viability. Integrated weed management strategies that facilitate these processes can lead to high levels of weed seed loss....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
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
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
Before you run that combine through every acre of your fields, I’d highly recommend reading “Resistant Palmer amaranth hits the Midwest." This weed is a game changer, and if left unchecked without multiple herbicide modes of control, you can literally lose a field in three years’ time....More
Tom Kladar, insect management technology development rep at Monsanto, talked to Managing Editor Susan Winsor about scouting for corn rootworm beetles. Here, Kladar covers scouting for adult beetles, plant selection when scouting, threshold levels, extended diapause, tillage and rootworm trends....More
On July 6, 2011, Joe Steinkamp changed his entire weed-management program. Steinkamp raises seed soybeans and white corn on Ohio River bottomland near Evansville, Ind. On that July day two years ago, his neighbor brought over some weeds that had survived Roundup. “He said, ‘Joe, do you know that these are?’ I said, ‘I sure do!’ ”...More