Early-season corn and weeds don’t just compete; they also interact on a genetic level. Weeds grow bigger while corn plants grow less. Sharon Clay, professor of plant science, South Dakota State University (SDSU), used genetic mapping technologies to disclose what happens in the plant....More
In the 5 ag stories to read this week, get tips for controlling marestail this spring, as well as for reducing compaction with lower tire pressures. Read insight from ag economists about corn price projections for the next marketing year, and from agronomy experts about increasing soybean yields. Finally, enjoy a book for kids about being on the farm.
This spring, let your smart phone help you as you head to the field. Download these apps to calculate seeding rates and fertilizer applications, as well as input calculators. Track growing degree days and field operations, and get fertilizer rates. Most of the apps are free, and most are available for iPhone and Android-based phones.
Emerged weeds have the potential to reduce crop yield. Agronomists and weed scientists recommend using more soil residual herbicides at full use rates to take weed stress off non-residual postemergence herbicides by introducing multiple, effective modes of action, different chemistries and controlling weeds for longer periods of time before they emerge. This strategy is called the Overlap System....More
What's an effective herbicide alternative to combat weed resistance? That's a question Bryan Young, associate professor of weed science, Purdue University, gets asked often. Being effective has to do with making sure that the herbicide alternative you're using can control the weed species, he says....More
In the 5 ag stories to read this week, get some considerations for seed treatments when trying to cut costs this spring. If you plant cover crops, be aware of residual herbicides, and there's still time to sign up for the Conservation Stewardship Program. Read 5 tillage myths, and watch a video thanking farmers, that also helps FFA.
In the 5 ag stories to read this week, learn how farmers are becoming more compliant when planting a refuge for Bt corn, and make your farm bill choices in seven steps. Read new research that says climate change is impeding soybean yields, and see what's new for herbicides this year. Finally, enjoy a smile from some cows.
New weed control options, which include both veteran and new active ingredients, cleared major milestones on the road to commercialization in 2014. Dow AgroSciences, Monsanto and Syngenta have new herbicides available (or soon to be available) to growers to help combat resistant weeds in 2015....More
The spread of multi-resistant waterhemp has led to increasing use of Group 14 herbicides, the protoporphyrinogen oxidase (PPO) inhibitors that include Cobra, Flexstar, Ultra Blazer and others. Repeated use is exerting intense pressure on this diverse group of chemicals, weed experts warn....More
This is the second of a two-part article highlighting what happened agriculturally in 2014. Last week’s article provided a review of 2014 crop production and weather conditions. This week we will focus on some highlights regarding input costs, grain prices and the overall farm economy for 2014....More
Managing editor Susan Winsor spoke with Ford Baldwin about weed resistance problems and how growers can manage the resistance issues that keep moving farther north. Baldwin offered farmers 5 things they can watch and do to keep weed resistance from becoming and even bigger problem....More
Can soybean seeding rates be used as part of an integrated herbicide resistance management program? That's the question in a study published in Weed Science. Researchers conducted studies in 2012 and 2013 to determine the most effective seeding rates when used with or without pre-emergence herbicides....More
Mike Morgan lives the pigweed nightmare and wants to spare others. The Clay County, Ark., farmer teamed up with his neighbors to defeat Palmer amaranth in ditches, turnrows (headlands) and communal areas. This new weed weapon, a collaboration of farmers, is bent on stopping resistant weeds wherever they grow....More
Jim Legvold’s weed-management story began when this Vincent, Iowa, farmer planned out his program, embodying a new approach. But the plot thickened after an extremely wet spring and cool summer thwarted his best-laid plans. Weather extremes, weed adaptability and low crop prices challenged his long-term plan of corn-soybean herbicides, residual herbicides and rotated modes of action....More
Weed resistance happens when a herbicide program relies on only one mode of action. This places extreme selection pressure on weed populations, which means a number of resistant weeds can survive the herbicide application, producing thousands of resistant weeds.
September soybean fields in Nebraska, Iowa and Minnesota displayed large numbers of escaped waterhemp. Perhaps this was the case in other states, too. While your combine journey across all your acres is fresh in your mind (and your partners’ minds), take time to evaluate your weed control program to enhance future effectiveness....More
Herbicides applied in the fall often can provide improved control of many winter annual weeds, including marestail, compared with similar applications made in the spring, says Aaron Hager, a University of Illinois weed scientist....More
The 5 ag stories featured this week offer management tips for wet soybeans, as well as advice for fall herbicide treatments. Read about possible corn acreage in 2015, and check out one farmer's strategy for keeping his farm ahead during lower-price years. For the weather obsessed (like me), see what NOAA is predicting for weather conditions across the U.S. this winter.
The EPA is registering the herbicide Enlist Duo with first-time ever restrictions to manage the problem of resistant weeds. The pesticide is for use in controlling weeds in corn and soybeans genetically-engineered (GE) to tolerate 2,4-D and glyphosate....More
Reports of more severe waterhemp infestation in Midwest soybean acres continue to roll in as we head into harvest, and that means more herbicide-tolerant weed seed going into the ground to cause larger future problems....More
These 5 ag stories to read talk about the impact of recent low temperatures on soybean yield, and remind growers to scout corn fields for stalk and ear rots before harvest. There is also big picture information about the choices farmers will soon make regarding the 2014 Farm Bill. Read advice on using tillage to control resistant weeds, and for the hunters, check out the 2014 pheasant hunting forecast.
During the growing season, it can be difficult to tell the difference between Palmer amaranth and waterhemp plants. Before you harvest soybean fields this fall, take some time to scout for these weeds. These photos from Aaron Hager at the University of Illinois will help you identify Palmer amaranth plants.
“Do we need to till or not?” Purdue University weed scientist Bryan Young often hears this question from Midwest soybean growers fighting herbicide-resistant marestail, waterhemp and Palmer amaranth....More
This installment of 5 Agriculture stories to read reminds growers to adhere to herbicide rotation, and offers new research about using clover as a nitrogen source for corn. There is also help for making farm bill decisions regarding yield updates, and information on GMO safety and labeling, and the consumer's willingness to pay for it. Finally, read about a farmer who lost his cell phone in a grain bin, and had it turn up in Japan....More
If wet weather has delayed postemergence herbicide application to your soybean fields, there may be some large giant ragweed that needs treating. Mark Loux, Ohio State University, offers tips for herbicide application, depending on resistance levels....More