Wet weather has delayed POST herbicide applications in both corn and soybeans. This can result in weeds and crops that are larger and more advanced in growth stage than anticipated. The larger crop is primarily a problem in corn, where a more advanced growth stage can start to limit herbicide options....More
From weeds to insect pests to disease, resistance to efficient, economical crop protection products is threatening their efficacy and raising costs for crop producers. So why do regulations or the chemical industry always seem to have a delayed reaction to resistance? A big part of the problem involves dueling definitions, suggests Tim Dennehy, manager, Global Insect Resistance Management, Bayer Seeds....More
In the 5 ag stories to read this week, read about what's causing striping on corn leaves and get some tips for applying soil residual herbicides to emerged corn. Share your cover crop challenges and get our best crop scouting tips and ideas. Finally, enjoy some fun dairy facts for National Dairy Month.
Farmers who spot giant ragweed in their corn or soybean fields should apply a post-emergent herbicide before the infestation becomes unmanageable, even if no other weeds have appeared, two Purdue University plant scientists advise....More
NCGA and ASA are concerned that a pending announcement from the U.N. World Health Organization’s International Agency for Research on Cancer will only lead to more confusion and concern about two widely-used herbicides that have been mainstays for farmers for decades. These two substances play an especially important role in corn and soybean farming as they allow us to manage weeds in a sustainable way....More
In the 5 ag stories to read this week, get some considerations for planting soybeans late. Learn about the part geography plays in weed diversity and glyphosate resistance, and mark you calendars for an opportunity to enroll new acres in CRP. Also, read about some successful women farmers and the roles they play on the farm. Finally, enjoy the latest parody from the Peterson Farm Brothers, Takin' Care of Livestock.
Competition from weeds up to 4 inches only minimally affected nutrient acquisition by soybeans, while competition from weeds 8 inches or taller negatively affected acquisition. Soybean yields and grain oil content were reduced....More
Most, but not all, soil residual herbicides can be applied after corn has emerged. Labels usually indicate a maximum corn growth stage beyond which applications should not occur. These growth stages can range from as early as two leaf collars to as late as 40-inch tall corn, so be sure to consult the respective product labels....More
In the 5 ag stories to read this week, see the value in pre-emergence herbicide control of Palmer Amaranth, and learn the value of nitrogen available in spring-applied manure. Read a letter to congress asking for a science-based food labeling standard and get a list of mobile apps to help you on the farm this spring. Finally, enjoy streaming the movie Farmland on Netflix!
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