Hebei Lansheng Biotech Co., Ltd.
ShangHai Yuelian Biotech Co., Ltd.

Study shows environmental link to herbicide-resistant horseweedqrcode

Jul. 27, 2021

Favorites Print
Forward
Jul. 27, 2021

QQ截图20210727112726.pngHorseweed is a serious threat to both agricultural crops and natural landscapes around the globe. In the U.S., the weed is prolific and able to emerge at any time of the year.

Fall emerging horseweed overwinters as a rosette, while spring emerging horseweed skips the rosette stage and grows upright. In some instances, both rosette and upright plants emerge simultaneously in mid-summer. These unpredictable growth patterns create challenges for growers as they try to develop an appropriate weed management plan.

In a study featured in the journal Weed Science, a team from Michigan State University explored whether environmental cues could be used to predict horseweed growth type. They found that variations in temperature, photoperiod, competition, shading, and soil moisture resulted only in the rosette growth type. Upright plants emerged, though, when seeds were exposed to dry conditions, followed by a prolonged cooling.

Researchers also determined that upright horseweed plants from known glyphosate-resistant populations are three- to four-fold less sensitive to glyphosate than their rosette siblings, which makes them much harder to control.

"Our results suggest that when horseweed populations shift from winter to summer annual lifecycles, concurrent increases can be expected in glyphosate resistance," says researcher John Schramski of Michigan State University.

To learn more, read the article "Environmental cues affecting horseweed (Conyza canadensis) growth type and their sensitivity to glyphosate" online, available Open Access.


Picture 0/1200

More from AgroNews

Magazine

2021 Market Insight 2021 India Pesticide Suppliers Guide
2021 CRO & CRAO Manual 2021 Latin America Focus
2021 Seed Treatment Special 2021 Biologicals Special
Subscribe Comment

Subscribe 

Subscribe Email: *
Name:
Mobile Number:  

Comment  

Picture 0/1200

Subscribe to daily email alerts of AgroNews.