A population of common waterhemp has developed resistance to postemergent application of HPPD-inhibiting herbicides (e.g., Callisto, Laudis and Impact). This resistance occurred in a seed-corn production system where these HPPD-inhibiting herbicides were repeatedly used over the last five years.
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....More
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....More
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.
Wet soil conditions have caused delays in planting and in efforts to control existing weed vegetation. Much of the existing weed growth is comprised of winter annual species, such as common chickweed, henbit, purple deadnettle, etc., but emergence of several summer annual species also has begun....More
Wet soil conditions have caused delays in planting and in efforts to control existing weed vegetation. Much of the existing weed growth is comprised of winter annual species, such as common chickweed, henbit, purple deadnettle, etc., but emergence of several summer annual species also has begun....More
Tips for dealing with herbicide-resistant weeds, especially glyphosate resistance. Respect the Rotation is an herbicide diversity initiative; including weed management articles, test plot photos and video presentations from experts...More
Dry soil conditions, such as such as those in Illinois in 2012, often slow the rate of herbicide degradation and increase the potential for damage to rotational crops from herbicide carryover, according to Aaron Hager, a University of Illinois weed science expert....More
If there’s any good news in the herbicide-resistant weed situation in Iowa, it’s that most Iowa growers still have a little time to stay out in front of the issue...but maybe not as much time as you’d like....More
Syngenta has responded to the failure of the European Commission to win support for an EU-wide ban on neonicotinoid pesticides. A majority of Member States refused to support the proposal to restrict their use on all bee attractive crops. The Commission must now decide whether to appeal the decision or amend its proposal....More
As if last year's drought didn't cause enough problems in 2012, now there are some agronomic factors that could impact the 2013 crop if producers don't manage them appropriately. Those factors include potential herbicide carryover and heavy weed pressure in existing crop stands....More
