Crop Chemicals

Screen Waterhemp for Herbicide Resistance

Tue, 18 Jun 2013 20:46:00 +0000

Source: University of Illinois

The weed science program at the University of Illinois is offering free screenings for herbicide resistance in waterhemp to Illinois farmers during the 2013 growing season. Aaron Hager, associate professor of weed sciences at U of I, says with continued financial support from the Illinois Soybean Association, over 1,000 plant samples have been screened through the collaborative effort between the U of I and the ISA.

5 Tips for Early-Season Post-Emergence Weed Control

Wed, 12 Jun 2013 20:50:00 +0000

Source: DuPont Pioneer

After starting the season with clean fields at planting, now is the time to focus on early-season weed control to maintain maximum yield potential. For corn, weeds can reduce yield as soon as the V2 stage or when corn is roughly 6-8 in. tall.

Weed Identification: Palmer Amaranth and Waterhemp

Fri, 07 Jun 2013 20:24:00 +0000

Source: University of Illinois

Early and accurate identification of Palmer amaranth plants, including waterhemp, coupled with implementation of an integrated management program are essential to reduce the potential for crop yield loss due to interference of Palmer amaranth. Proper management of Palmer amaranth populations can help reduce the potential for successful seed production that will augment the soil seedbank and perpetuate the population in future growing seasons.

6 Tips to Get the Most Out of Spray Nozzles When Applying Pesticides

Fri, 07 Jun 2013 15:03:00 +0000

Source: Purdue University, Ohio State University

Choosing the right type of sprayer nozzle can make a huge difference in how effective pesticides are during a growing season and whether growers have to re-spray their fields or in some cases, replant, says Erdal Ozkan, an agricultural engineering professor and spray technology expert with Ohio State University Extension and the Ohio Agricultural Research and Development Center (OARDC).

Horseweed (Marestail) Control After Corn, Soybean Emergence

Thu, 06 Jun 2013 20:41:00 +0000

Source: University of Illinois

Over the past several days, growers have increasingly been looking for options to control marestail after corn and soybean emergence, says University of Illinois Associate Professor of Weed Sciences Aaron Hager. “Many have reported poor marestail control from herbicides applied prior to planting (primarily no-till soybean), especially when these burndown applications contained only glyphosate or glyphosate and 2,4-D."

Soil Residual Herbicide Options After Soybean, Corn Emergence

Wed, 05 Jun 2013 19:16:00 +0000

By Lizabeth Stahl and Jeff Gunsolus, University of Minnesota Extension

With very tight windows of opportunity to plant this year, pre-emergence herbicides may not have been applied as planned. Application of a residual herbicide prior to planting or emergence of the crop, in both corn and soybean, is a great weed management strategy overall and also a key tool in managing against herbicide resistance. What are some options if soybeans emerged before a pre-emergence herbicide application was made?

USDA Investigating Detection Of Positive Genetically Engineered Glyphosate-Resistant Wheat

Wed, 29 May 2013 20:04:00 +0000

Control Emerged Waterhemp Before Planting Soybeans

Mon, 20 May 2013 16:38:00 +0000

Source: University of Illinois

The increasing prevalence of waterhemp plants and populations that demonstrate resistance to herbicides from more than one site-of-action family increases the importance of controlling any emerged waterhemp plants before planting.

6 Tips for Postemergence Application of Pre-Emergence Corn Herbicides

Tue, 14 May 2013 20:34:00 +0000

Source: Ohio State University

One of the problems with a wet start to the season when planting gets compressed into short periods is the lack of time to apply preemergence herbicides and 28% before corn emerges. Most pre-emergence corn herbicides can be applied to emerged corn, and some of them have enough foliar activity to control small, emerged weeds without the need to add postemergence (post) herbicides.

Scout Corn Fields for These 5 Weeds

Wed, 08 May 2013 22:14:00 +0000

Source: Dow AgroSciences

With more weeds becoming glyphosate-resistant or surviving glyphosate-only applications, corn growers continue to rely on residual herbicides to manage tough weeds and protect their yield. "We need to maximize the number of sites of action,” says Travis Legleiter, weed program science specialist at Purdue University.