Remain Vigilant for Palmer Amaranth
Mon, Sept 22, 2014
by Aaron Hager, University of Illinois
Stiff, pointed bracts of a female Palmer amaranth
Accurate identification of weedy Amaranthus species during early vegetative stages can be difficult. However, identification of the various species becomes much more reliable when reproductive structures are present.
Before harvest begins, consider taking a few minutes to scout fields; at this time of year it is much easier to differentiate between Palmer amaranth and waterhemp plants. View photos
Conducive Weather for Soybean Diseases Provides a Good Opportunity for Variety Evaluation
Wed, Aug 27, 2014
Symptoms of early dying caused by white mold
Early dying of soybean plants in the pod filling stage is being reported by farmers and Extension specialists in several states. Early dying can be caused by white mold (Sclerotinia stem rot), brown stem rot, sudden death syndrome, and Phytophthora stem rot. All these situations are caused by different soybean pathogens, and all can be managed with host resistance.
At this point in the season, there is nothing to spray to control these diseases. But it's important to diagnose the situation correctly. Make note of the variety – the weather this season has been very conducive for soybean diseases, so it's a particularly good year to get data on how your varieties are performing under disease pressure.
Taking the time to assess stands and final crop health will go a long way to reduce losses the next time that field is planted to soybean. Read these bulletins from state soybean pathologists: Fields are starting to turn a golden yellow – last chance to grab some data
. Anne Dorrance, Ohio State University White mold (Sclerotina stem rot) is here
. Anne Dorrance, Ohio State University Destructive diseases of soybean – sudden death syndrome and white mold – observed in the state.
Carl Bradley, University of IllinoisBe on the Lookout for Brown Stem Rot in Soybean.
Daren Mueller, Iowa State UniversityDo you know your stem rots?
Anne Dorrance, Ohio State University
Soybean Producers Learn About Soybean Aphid Research at Regional Field Day
Fri, Aug 22, 2014
Over 50 participants attended a regional capstone event on an Iowa State University demonstration farm near Ames, Iowa. The event showcased soybean aphid research from a three-year NCSRP-funded research and extension grant.
The research showcased at this field day was a collaborative effort from university researchers at 11 different universities in the North Central region. Eighteen soybean aphid researchers were present to discuss their research and answer questions. Read the full article