Results 171 to 180 of about 3,231 (199)

Paraquat‐Resistant Horseweed Identified in the Mid‐Atlantic States

Crop Management, 2006
In 2003, a small percentage of horseweed (Conyza canadensis) plants survived sequential paraquat applications in a research trial conducted in a commercial field. This research project focused on determining if this horseweed population was resistant to paraquat.
Mark J. VanGessel, Barbara A. Scott, Quintin R. Johnson   +2 more
openaire   +1 more source

Emergence and survival of horseweed (Conyza canadensis)

Weed Science, 1997
Horseweed emergence and survival were evaluated in no-tillage soybean and corn at Rosemount, MN, and Ames, IA, from the fall of 1992 through the summer of 1995. Most of the horseweed at both locations emerged in the fall. Winter survival of fall-emerged seedlings ranged from 59 to 91%.
Douglas D. Buhler, Micheal D. K. Owen
openaire   +1 more source

Horseweed with Reduced Susceptibility to Glyphosate Found in the Czech Republic

Journal of Agricultural and Food Chemistry, 2009
The physiological and molecular basis of apparent resistance to glyphosate in horseweed (Conyza canadensis L. Cronq.) plants that had survived being sprayed with the herbicide at Prague-Bubny railway station in the Czech Republic was investigated. For the sake of comparison, plants expected to be susceptible were collected in areas where no herbicides ...
Daniela, Chodová, Jaroslav, Salava, Olga, Martincová, Milena, Cvikrová   +3 more
openaire   +2 more sources

Online tool for GR horseweed (Conyza canadensis) gene flow

2013 Kansas City, Missouri, July 21 - July 24, 2013, 2013
Abstract. Horseweed (Conyza canadensis) with evolved glyphosate resistance (GR) has become an especially problematic weed in crop production across the United States. This paper reports on the framework development of an Internet decision tool that can be used by regulatory agencies, industries, farmers, and the public.
null Junming Wang, null Haiyan Huang, null Rongjian Ye, null Yanhui Peng, null Charles Neal Stewart, null David R. Miller, null Ted W. Sammis   +6 more
openaire   +1 more source

Glyphosate-Resistant Horseweed (Conyza canadensis) in Mississippi

Weed Technology, 2004
Survival of horseweed in several glyphosate-tolerant cotton and soybean fields treated with glyphosate at recommended rates preplant and postemergence was observed in Mississippi and Tennessee in 2001 and 2002. Plants originating from seed collected from fields where horseweed escapes occurred in 2002 were grown in the greenhouse to the 5-leaf, 13- to ...
Clifford H. Koger, Daniel H. Poston, Robert M. Hayes, Robert F. Montgomery   +3 more
openaire   +1 more source

Horseweed (Conyza canadensis) management in Oklahoma winter wheat

Weed Technology, 2019
AbstractHalauxifen plus florasulam, thifensulfuron plus fluroxypyr, and bromoxynil plus bicyclopyrone are three, relatively new POST premix herbicides developed for control of broadleaf weeds in winter wheat. These herbicides, along with older products, were evaluated for their control of horseweed in Altus, Perkins, and Ponca City, Oklahoma, during ...
Jodie A. Crose, Misha R. Manuchehri, Todd A. Baughman   +2 more
openaire   +1 more source

Crop sequence affects horseweed density and productivity in oats

Crop, Forage & Turfgrass Management
Plain Language SummaryDiversified crop rotations can provide many benefits that include greater yield stability, better nutrient cycling, and improved pest management. In a long‐term experiment, we observed weed differences in oat that was the result of whether the previous crop was corn or grain sorghum.
Marty Schmer, Gary Varvel, Steve Swanson, Ben Fann   +3 more
openaire   +1 more source

Proteomic Analysis of Horseweed ( Conyza canadensis ) Subjected to Caprylic Acid Stress

PROTEOMICS, 2019
Abstract Caprylic acid (CAP) is anticipated to be a potential biocontrol herbicide in the control of weeds, however the molecular mechanism of how CAP affects weeds is poorly understood. Here, the physiological and biochemical (protein‐level) changes in horseweed ( Conyza canadensis
Zuren, Li, Wei, Kuang, Yongbo, Liu, Di, Peng, Lianyang, Bai   +4 more
openaire   +2 more sources

Horseweed (Conyza canadensis) seed collected in the planetary boundary layer

Weed Science, 2006
Abstract Horseweed is a winter or summer annual plant, native to North America and distributed worldwide in temperate climates. This plant is considered an important agricultural weed because it can reduce agricultural yields by 90% at high densities and becomes problematic under low-tillage agriculture.
Shields, Elson., Dauer, Joseph., VanGessel, Mark., Neumann, Gabor.   +3 more
openaire   +1 more source

Resistance to Triazine Herbicides in Horseweed (Conyza canadensis)

Weed Science, 1984
Insensitivity to atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] and certain other herbicides was found in plants of horseweed (Conyza canadensis(L.) Crong. ♯4ERICA) collected from vineyards where atrazine had been applied extensively.
Endre Lehoczki, Gábor Laskay, Endre Pölös, József Mikulás   +3 more
openaire   +1 more source