Results 131 to 140 of about 324 (160)

Tolerance of ozone and drought in common waterhemp (Amaranthus tuberculatus)

Journal of Crop Improvement, 2019
Biological invasions in established cropping systems impact biodiversity and agricultural sustainability. Under conditions of multi-year drought and elevated tropospheric ozone (O3), several Amaranthus species have recently become problematic weeds in California. We examined responses of common waterhemp (A. tuberculatus) to 12-h mean O3 exposures of 4,
David A. Grantz, Rama Paudel, Anil Shrestha   +2 more
openaire   +1 more source

A Waterhemp (Amaranthus tuberculatus) Population Resistant to 2,4-D

Weed Science, 2012
A waterhemp population from a native-grass seed production field in Nebraska was no longer effectively controlled by 2,4-D. Seed was collected from the site, and dose-response studies were conducted to determine if this population was herbicide resistant.
Mark L. Bernards, Roberto J. Crespo, Greg R. Kruger, Roch Gaussoin, Patrick J. Tranel   +4 more
openaire   +1 more source

Common waterhemp (Amaranthus rudis) resistance to protoporphyrinogen oxidase-inhibiting herbicides

Weed Science, 2003
Abstract Resistance to protoporphyrinogen oxidase (protox)-inhibiting herbicides was identified in a population of common waterhemp that had been treated with acifluorfen for several years. The protox-resistant biotype of common waterhemp was approximately 34, 82, 8, and 4 times more resistant than a susceptible common waterhemp biotype to acifluorfen,
Douglas E. Shoup, Kassim Al-Khatib, Dallas E. Peterson   +2 more
openaire   +1 more source

Baseline Sensitivity of Nebraska Waterhemp and Palmer Amaranth to Dicamba and 2,4‐D

Agronomy Journal, 2016
The development of dicamba (3,6‐dichloro‐2‐methoxybenzoic acid)‐ and 2,4‐D [(2,4‐dichlorophenoxy) acetic acid]‐resistant soybean [Glycine max (L.) Merr.] will increase the frequency of applying these herbicides to control broadleaf weeds in soybean production systems. We evaluated the sensitivity of randomly selected waterhemp [Amaranthus tuberculatus (
Roberto J. Crespo, Ana B. Wingeyer, Christopher J. Borman, Mark L. Bernards   +3 more
openaire   +1 more source

A Survey of Glyphosate-Resistant Waterhemp (Amaranthus rudis) in Missouri Soybean Fields and Prediction of Glyphosate Resistance in Future Waterhemp Populations Based on In-Field Observations and Management Practices

Weed Technology, 2013
A survey of soybean fields containing waterhemp infestations was conducted just prior to harvest in 2008 and 2009 to determine the frequency and distribution of glyphosate-resistant waterhemp in Missouri, and to determine if there are any in-field parameters that may serve as indicators of glyphosate resistance in this species in future crop production
Kristin K. Rosenbaum, Kevin W. Bradley
openaire   +1 more source

Sampling the Waterhemp (Amaranthus tuberculatus) Genome Using Pyrosequencing Technology

Weed Science, 2009
Recent advances in sequencing technologies (next-generation sequencing) offer dramatically increased sequencing throughput at a lower cost than traditional Sanger sequencing. This technology is changing genomics research by allowing large scale sequencing experiments in nonmodel systems.
Ryan M. Lee, Jyothi Thimmapuram, Kate A. Thinglum, George Gong, Alvaro G. Hernandez, Chris L. Wright, Ryan W. Kim, Mark A. Mikel, Patrick J. Tranel   +8 more
openaire   +1 more source

Acetolactate Synthase Resistance in a Common Waterhemp (Amaranthus rudis) Population

Weed Technology, 1997
Research was initiated to determine (a) whether a common waterhemp population was resistant to acetolactate synthase (ALS) inhibiting herbicides, (b) the percentage of the population that was ALS-inhibitor resistant, (c) the resistance mechanism, and (d) the effectiveness of a whole plant assay to detect ALS-inhibitor resistance.
John R. R. Hinz, Micheal D. K. Owen
openaire   +1 more source

Imidazolinone and Sulfonylurea Resistance in a Biotype of Common Waterhemp (Amaranthus rudis)

Weed Science, 1996
The incidence of weed resistance to acetolactate synthase (ALS) inhibiting herbicides has increased in the United States. In 1993, a population of ALS-resistant common waterhemp was discovered after two confirmed applications of an imidazolinone herbicide.
Sarah Taylor Lovell, Loyd M. Wax, Michael J. Horak, Dallas E. Peterson   +3 more
openaire   +1 more source

Glyphosate-Resistant Common Waterhemp (Amaranthus rudis) Confirmed in Texas

Weed Technology, 2011
Glyphosate-resistantAmaranthusspecies are a recognized risk to U.S. agriculture. With affected cropland exceeding 1.2 million ha, this epidemic is particularly pertinent to agricultural regions that utilize an intensive glyphosate-based management program to control weedy pests. Before 2006, Texas had no identified glyphosate-resistant populations. Two
G. G. Light, M. Y. Mohammed, P. A. Dotray, J. M. Chandler, R. J. Wright   +4 more
openaire   +1 more source

Waterhemp Flowering Guide-Paper and Guide

2021
openaire   +1 more source