Protect Corn Now Before Gray Leaf Spot Strikes
June 9, 2017 · No comments
Gray leaf spot (GLS) has become one of the most yield-limiting diseases for corn in multiple regions across the U.S. GLS pathogens are known for overwintering in crop residue – it only takes a combination of warm and humid weather for GLS to spread and infect a new plant. When scouting, Purdue University advises growers to check corn leaves for small, pinpoint lesions surrounded by yellow halos. Further along in development, lesions become long, narrow...
Don’t Let Phytophthora Ruin Soybean Fields
June 8, 2017 · No comments
Conditions in many parts of the Corn Belt have been just warm and wet enough for Phytophthora root rot to crop up in many soybean fields. The pathogen, which has more than 50 genetic forms in North America, often initially presents itself in seedlings, but it can stay for the long haul, wreaking havoc from the beginning to the end of the growing season. Knowing what to look for and how to prevent the disease...
What’s In a Herbicide?
June 7, 2017 · No comments
As discussed in the post, Part 1: More Powerful Weed Control, More Often, it’s important to know the facts about what components are in your herbicides and how effective each component is on weeds in your area. As more mesotrione-containing premixes enter the market, it’s important to ask yourself, “Am I getting the same active ingredients in any mesotrione premix?” The answer? No. While many herbicides contain mesotrione, the other active ingredients used are also important for...
Mid-Season Tough Weed: Palmer Amaranth
June 5, 2017 · No comments
Caption: Palmer Amaranth Out of a number of problematic weeds to watch for, Palmer amaranth remains a top threat across most soybean- and corn-producing regions. Purdue University characterizes Palmer amaranth as a particularly problematic weed because of its ability to produce 100,000 to 1/2 million seeds per plant, easily disperse its seeds and compete aggressively with crops by growing 2 to 3 inches per day. Palmer amaranth is unpredictable – it can emerge at any...
Predicted Wet Summer Favorable for Frogeye Leaf Spot
June 2, 2017 · No comments
The Climate Prediction Center predicts above-average rainfall over the next three months in the Central and Northern Plains. High rainfall and warm summer temperatures favor frogeye leaf spot (FELS) development in soybeans. The University of Nebraska-Lincoln adds that rain, in addition to wind, can also help disperse FELS spores, spreading the infection. Untreated (top) and Trivapro R3 (bottom) Source: Joe Wuerffel, R&D. *Based on 9 large plot trials in the U.S. in 2016 FELS infection...
Mid-Season Tough Weed: Horseweed (Marestail)
May 30, 2017 · No comments
Caption: Horseweed (marestail) As young corn and soybean plants continue to grow, growers should look out for horseweed (marestail). This annual weed typically germinates in the fall or spring but also has the unique ability to do so year-round. Purdue University says that crop rotation doesn’t affect horseweed, so knocking down this weed before its highly mobile seeds spread throughout the field offers the best chance of control. Horseweed is often misidentified as whitlowgrass or...
Armyworms Begin to Forage Soybeans
May 23, 2017 · No comments
Caption: Fall armyworm As many entomologists predicted, the mild winter and wet spring have created perfect conditions for early pressure from insects this season. Recent entomologist reports indicate that some insect populations are already approaching economic thresholds in the Mid-South. Gus Lorenz, extension entomologist at University of Arkansas, told Syngenta Pest Patrol that he’s already received reports of a complex of armyworms, up 5 to 6 per row foot, feeding on soybean seedlings. According to...
The Pigweeds Prone to Escape
May 23, 2017 · No comments
Sound the alarm: The University of Illinois urges growers in the Midwest to rethink their waterhemp and Palmer amaranth management plans. If waterhemp and Palmer amaranth aren’t controlled early in the season, they risk going to seed and passing their herbicide-resistance genes to new generations. Waterhemp has already demonstrated resistance to 6 different herbicide groups. Waterhemp In 2016, the University of Missouri identified a Palmer amaranth population with resistance to both glyphosate and PPO inhibitors....
Three Things to Consider When Replanting Corn
May 22, 2017 · No comments
Wet conditions during corn planting have growers facing a tough decision: replant or hold firm. We recommend growers choosing to replant consider the following: Start clean…again: Ensure the original corn crop is eradicated before replanting. If it’s allowed to emerge after replanting, it will rob water and nutrients from the replanted corn. We recommend shallow tillage, as this will eradicate the first corn crop without burying your pre-emergence herbicide application so deep that it loses...
