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Investigating a rapid decline in North Florida corn fields

fusarium root rot

• By De Broughton, Ian Small and Fanny Iriarte • What are the symptoms? In recent weeks, extension agents in various locations across North Florida (primarily in the Northeast) have received calls from growers and consultants about symptoms of rapid decline in corn. Symptoms observed include leaf blight and in general, a wilted, scalded appearance of foliage still in the ... Read More »

Scout and correctly ID diseases to aid management

southern rust

• By Heather Marie Kelly • Relatively low disease has been observed in Tennessee so far. The warmer winters most areas had may have allowed survival of disease inoculum and paired with storms coming from the south could result in more disease development this season. So scouting and correctly identifying diseases are important. Whether a disease will develop and cause ... Read More »

UF/UGA hold virtual corn silage hybrid field day

panhandle corn wide

2020 has been a year of many challenges so far, but that didn’t stop our corn hybrid trial from being excellent! With cold nights and sunny days at the beginning of the season, great genetic material, and a fantastic dedication of the University of Florida/Institute of Food and Agriculture Sciences Plant Science Research and Education Unit staff, our corn looks ... Read More »

How to scout and manage stink bugs in pre-tassel corn

primary ear shoot

• By Dominic Reisig • With corn shooting up, some fields are not too far away from tasseling. It is critical to scout all corn when the primary ear is growing and to protect it during the two weeks prior to tasseling. This recent blog post details important changes to the threshold that were made this year and provides guidance ... Read More »

Reassess your strategy regarding tassel applications

corn tassel

• By Erick Larson • Mississippi’s corn crop is spread out this year across a considerable range of planting dates, with a few early fields already tasseling, and the bulk will be soon. Tassels clearly distinguish the transition from vegetative to reproductive growth stages in corn. The early corn reproductive stages are the most sensitive stages to environmental stress and ... Read More »

Virginia, North Carolina change stink bug thresholds for corn

brown stink bug

• By Dominic Reisig • The threshold for stink bugs in corn is changing based on recent research conducted in both North Carolina and Virginia. These studies indicated that, while seedling thresholds were effective, there was evidence that the pre-tasseling and early reproductive stages threshold should be lowered. We also shortened the period that stink bugs needed to be controlled ... Read More »

UK study shows tasseling fungicide applications may offer greatest benefits

gray leaf spot

Corn producers have the greatest chance of controlling foliar diseases and improving the crop’s stalk strength when foliar fungicide treatments are applied at the tasseling (VT) growth stage, according to a University of Kentucky study. “Foliar diseases like gray leaf spot and southern rust frequently appear after tasseling and into grain fill. This prompts farmers and agribusiness personnel to ask ... Read More »

Scout seedling corn for stink bugs

stink bugs in corn

• By Dominic Reisig • A lot of folks have noticed more stink bugs than normal for this time of year. The most common question is what does that mean for the rest of the season? Unfortunately, I can’t answer that question because stink bugs we see now are the overwintering generation that will reproduce in May. This generation developed ... Read More »

Tips for managing nitrogen fertilizer during wet weather

msu corn

• By Erick Larson, Larry Oldham and Bobby Golden • Mississippi’s warm, wet climate can pose considerable issues with nitrogen fertilization for corn, which is quite responsive and demands high amounts for optimal productivity. But the climate also greatly increases potential nitrogen loss through volatilization, denitrification and leaching compared to drier and colder climates. Of course, the corn-growing season is ... Read More »

Don’t lose corn yield to early weed pressure

tamu weed plots

• By Tom Barber • Weed control in Arkansas corn production has become more difficult over the past several years with the onset of glyphosate-resistant pigweed, marestail and ryegrass. Each of these weeds, if not controlled prior to planting, can rob corn of yield potential. To make matters worse, pigweed populations have been found resistant to six herbicide modes of ... Read More »