Common Ragweed Ambrosia Artemisiifolia L Accessions In The Mid Atlantic Region Resistant To Als Ppo And Epsps Inhibiting Herbicides
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Common Ragweed Ambrosia Artemisiifolia L Accessions In The Mid Atlantic Region Resistant To Als Ppo And Epsps Inhibiting Herbicides
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Author : Frank J. D'Amico (Jr)
language : en
Publisher:
Release Date : 2023
Common Ragweed Ambrosia Artemisiifolia L Accessions In The Mid Atlantic Region Resistant To Als Ppo And Epsps Inhibiting Herbicides written by Frank J. D'Amico (Jr) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
Common ragweed is a troublesome weed in many crops. Farmers and crop advisors in the coastal Mid-Atlantic region have reported inadequate control of common ragweed in soybean with glyphosate and herbicides with other modes of action. To determine if herbicide resistance was one of the causes in poor herbicide performance, seed was collected from twenty-nine sites where common ragweed plants survived herbicide applications and produced viable seeds. Common ragweed seedlings from those accessions were exposed to multiple rates of cloransulam, fomesafen, and glyphosate, applied as single postemergence (POST) herbicide application. All accessions except DE3 demonstrated resistance to one of the herbicides applied at a 2X rate, twenty-six accessions were 2-way resistant (glyphosate- and cloransulam-resistant) and 3-way resistance was present in eight accessions collected from three different states. In a separate study, select accessions were then treated PRE with ALS- or PPO- inhibiting herbicides. All accessions treated PRE with the ALS-inhibitors chlorimuron or cloransulam demonstrated resistance at the 2X rates. The accessions treated with the PPO-inhibitor sulfentrazone, had survivors at the 2X rate. When the same accessions were treated with fomesafen one had survivors at the 2X rate, and one had survivors at the 1X rate. Results from these tests confirmed common ragweed with 3-way resistance to POST herbicides is widespread in the region. In addition, this is the first confirmation that common ragweed accessions in the region are also resistant to ALS- or PPO- inhibiting herbicides when applied PRE.
The Annual Ragweeds Ambrosia Artemisiifolia L Ambrosia Trifida L
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Author : Lucie Meyer
language : en
Publisher:
Release Date : 2018
The Annual Ragweeds Ambrosia Artemisiifolia L Ambrosia Trifida L written by Lucie Meyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
The first aim of this work was to investigate the risk for the evolution of resistance to acetolactate synthase inhibitor (ALS) herbicides in the common ragweed (Ambrosia artemisiifolia L.) through four points: (i) the selection pressure (effectiveness of a range of ALS inhibitor herbicides), (ii) the adaptive response of Ambrosia artemisiifolia (recurrent selection experiment), (iii) a resistance monitoring in fields in France, and (iv) the investigation of the mechanisms underlying herbicide resistance (target-site (TSR) and non-target-site resistance (NTSR) using transcriptomic analyses). The second aim was to study the connectivity of A. artemisiifolia populations in agricultural landscapes using microsatellite markers developed during this work, to determine factors that could facilitate the spread of this invasive weed species and the spread of herbicide resistance.In regards to herbicide resistance:-The sensitivity of A. artemisiifolia to ALS-inhibiting herbicides is variable between active ingredients.-Plants that survived the French maximum authorized field rate and higher rates of metsulfuron were selected to implement a recurrent breeding program. After two selection cycles, the resistance level to metsulfuron increased and resistance to imazamox and tribenuron emerged.-Three cases of imazamox resistance were identified in the field, including two cases of pure NTSR and one case of TSR - NTSR coexistence.-A transcriptome for A. artemisiifolia, AMBELbase, was generated using the PacBio sequencing technology to search for genes involved in NTSR mechanisms (RNAseq approach). 62 candidate contigs were identified including ABC transporters, cytochromes P450 and glutathione S-transferases known to be involved in the degradation of herbicides.In regards to population connectivity:-26 microsatellite markers were developed and revealed high genetic variability. Genetic structuring has been studied on a large scale for populations of A. artemisiifolia from Europe (invasion range) and North America (native range).-On a finer scale (agricultural landscape), the genetic structure of populations was influenced by colonization events. Migration events detected among the areas colonized by A. artemisiifolia suggested moderate pollen/seed flows and connectivity at the farmland scale. In agricultural environments, herbicide resistant alleles could be easily spread among neighbouring populations via pollen flow, and also at longer distances via seed dispersal. Human-related activities play a major role in the dispersal of seeds (agricultural machinery, contaminated seed lots, etc.).-The mating system analysis confirmed that A. artemisiifolia is an obligate outcrossing species which leads to important intra- and inter-population gene flow.The knowledge acquired during this work may help to foster the development of better management strategies to effectively control A. artemisiifolia to limit its spread, such as:-Diversified weed control strategies: combination of mechanical (including false-seed) and chemical weeding (diversification of herbicide modes of action).-Longer diversified crop rotations including more winter crops and/or cover and competitive crops to break the life cycle of A. artemisiifolia.These knowledge may also be used to better control of another weed species of the genus Ambrosia, Ambrosia trifida L.
Herbicide Resistance In Plants
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Author : Stephen B. Powles
language : en
Publisher: CRC Press
Release Date : 2018-02-01
Herbicide Resistance In Plants written by Stephen B. Powles and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-01 with Science categories.
The late 1980s saw an explosion in the amount and diversity of herbicide resistance, posing a threat to crop production in many countries. The rapid escalation in herbicide resistance worldwide and in the understanding of resistance at the population, biochemical, and molecular level is the focus of this timely book. Leading researchers from North America, Australia, and Western Europe present lucid reviews that consider the population dynamics and genetics, biochemistry, and agro-ecology of resistance. Resistance to various herbicides is discussed in detail, as well as the mechanisms responsible for cross resistance and multiple resistance. This reference is invaluable to those interested in evolution and the ability of species to overcome severe environmental stress.
Hydroponic Food Production
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Author : Howard M. Resh
language : en
Publisher: Woodbridge Press Publishing Company
Release Date : 1981
Hydroponic Food Production written by Howard M. Resh and has been published by Woodbridge Press Publishing Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Food crops categories.
Recent Advances In Weed Management
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Author : Bhagirath S. Chauhan
language : en
Publisher: Springer
Release Date : 2014-07-10
Recent Advances In Weed Management written by Bhagirath S. Chauhan and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-10 with Science categories.
This volume addresses recent developments in weed science. These developments include conservation agriculture and conservation tillage, climate change, environmental concerns about the runoff of agrochemicals, resistance of weeds and crops to herbicides, and the need for a vastly improved understanding of weed ecology and herbicide use. The book provides details on harnessing knowledge of weed ecology to improve weed management in different crops and presents information on opportunities in weed management in different crops. Current management practices are also covered, along with guidance for selecting herbicides and using them effectively. Written by experts in the field and supplemented with instructive illustrations and tables, Recent Advances in Weed Management is an essential reference for agricultural specialists and researchers, government agents, extension specialists, and professionals throughout the agrochemical industry, as well as a foundation for advanced students taking courses in weed science.
Physiological Ecology Of North American Plant Communities
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Author : Brain F. Chabot
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Physiological Ecology Of North American Plant Communities written by Brain F. Chabot and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Although, as W.D. Billings notes in his chapter in this book. the development of physiological ecology can be traced back to the very beginnings of the study of ecology it is clear that the modern development of this field in North America is due in the large part to the efforts of Billings alone. The foundation that Billings laid in the late 1950s came from his own studies on deserts and subsequently arctic and alpine plants, and also from his enormous success in instilling enthusiasm for the field in the numerous students attracted to the plant ecology program at Duke University. Billings' own studies provided the model for subsequent work in this field. Physiological techniques. normally confined to the laboratory. were brought into the field to examine processes under natural environmental conditions. These field studies were accompanied by experiments under controlled conditions where the relative impact of various factors could be assessed and further where genetic as opposed to environmental influences could be separated. This blending of field and laboratory approaches promoted the design of experiments which were of direct relevance to understanding the distribution and abundance of plants in nature. Physiological mechanisms were studied and assessed in the context of the functioning of plants under natural conditions rather than as an end in itself.
Herbicide
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Author : Jens C. Streibig
language : en
Publisher: Springer
Release Date : 1993
Herbicide written by Jens C. Streibig and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.
Herbicides
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Author : Andrew Price
language : en
Publisher: BoD – Books on Demand
Release Date : 2015-11-26
Herbicides written by Andrew Price and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-26 with Technology & Engineering categories.
Herbicides are one of the most widely used groups of pesticides worldwide for controlling weedy species in agricultural and non-crop settings. Due to the extensive use of herbicides and their value in weed management, herbicide research remains crucial for ensuring continued effective use of herbicides. Presently, a wide range of research continues to focus on improved herbicide use and weed biology. The authors of Herbicides, Agronomic Crops and Weed Biology cover multiple topics concerning current valuable herbicide research.
Weeds Of California And Other Western States
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Author : Joseph M. DiTomaso
language : en
Publisher: UCANR Publications
Release Date : 2007
Weeds Of California And Other Western States written by Joseph M. DiTomaso and has been published by UCANR Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Technology & Engineering categories.
This encyclopedic yet easy-to-use 2-volume set covers 262 individual entries, including a full description of 451 species and another 361 plants compared as similar species, representing 63 plant families. 13 shortcut identification tables for groups that share similar, unusual, or relatively uncommon characteristics. 2 grass identification keys - a key to all characteristics including inflorescences and reproductive parts and a key to vegetative characteristics only. 67 tables comparing important characteristics of difficult-to-distinguish weedy species. Color photos of over 700 weeds including seeds, seedlings, flowers, and mature plants. Appendix of non-native plants rarely or occasionally naturalized in California. Glossary of botanical terms. Bibliography of some of the most pertinent publications. Index to common names, scientific names, and synonyms. Each entry describes the plant category, family name, common name, and synonyms along with a summary of the important aspects of the plant’s life cycle, size, growth form, impact, method of introduction, and toxicity. You'll also find a description of the seedling, mature plant, roots and underground structures, flowers, fruits and seeds, spikelets and florets, spore-bearing structures, and post senescence characteristics for each entry. Also includes a description of the habitat where each is typically found and distribution in California, other states, and worldwide, along with maximum elevation at which the species is found. Rounding out each entry is a description of the methods of reproduction, seed dispersal, germination requirements and conditions, seed survival and longevity, early establishment characteristics and requirements, cultural practices and management options that have proven effective or ineffective in controlling infestations, and a notation of the species' inclusion on federal or state noxious weed lists.
Guidelines For Poster Presentations
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Author :
language : en
Publisher:
Release Date : 1986
Guidelines For Poster Presentations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Posters categories.