2 edition of Genetic diversity and herbicide resistance in annual bluegrass (Poa annua L.) found in the catalog.
Genetic diversity and herbicide resistance in annual bluegrass (Poa annua L.)
Lemma W. Mengistu
Written in English
|Statement||by Lemma W. Mengistu.|
|The Physical Object|
|Pagination||122 leaves, bound :|
|Number of Pages||122|
The objectives of this study were to: i. Classify Kentucky bluegrass genotypes based on morphological and agronomic traits and determine their inheritance patterns, ii. Evaluate the range of variability Kentucky bluegrass cultivars and selections exhibit in response to a novel annual bluegrass control, bispyribac-sodium herbicide, iii. The use of herbicide-resistant ([HR]) Clearfield rice (Oryza sativa) to control weedy rice has increased in the past 12 years to constitute about 60% of rice acreage in Arkansas, where most U.S. rice is grown. To assess the impact of [HR] cultivated rice on the herbicide resistance and population structure of weedy rice, weedy samples were collected from commercial fields with a.
Annual bluegrass has been shown to quickly develop resistance to herbicides and is ranked third among all herbicide-resistant weed species globally, with resistance to at least nine herbicide sites of action (1). A team of 17 university scientists has embarked on a $ million project to limit the impact of annual bluegrass. Genetic diversity and conservation status of Helianthus verticillatus, an endangered sunflower of the southern United States-(Peer Reviewed Journal) Controlling herbicide resistant annual bluegrass (Poa annua L.) phenotypes with methiozolin-(Peer Reviewed Journal).
10/27/ © Regents of the University of Minnesota. All rights reserved. 3 13 © Regents of the University of Minnesota. All rights reserved. With high genetic diversity and rapid adaptation to climates and management, this species is found in all U.S. hardiness zones, Grubbs said. Even small infestations can quickly spread throughout a turf field. Annual bluegrass. Annual bluegrass has a distinctly light green color with white flower heads, she said.
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Herbicide resistance in turfgrass weeds was first reported in Japan in The case involved an annual bluegrass that was identified as resistant to simazine—a photosystem-II (PSII) inhibitor.
In a survey of 20 golf courses in Mississippi, 18 of the 20 locations reported simazine-resistant annual bluegrass. Annual bluegrass has high levels of genetic diversity and can rapidly adapt to different climates and management programs, making it particularly challenging to control. When the same few herbicides are used frequently with little diversity in management practices, there is an increased risk of herbicide resistance.
Annual bluegrass has. Herbicide-resistant annual bluegrass (Poa annua) following two broadcast applications of glyphosate at pound per acre ( g ha-1) during winter dormancy in Rockford, Tennessee. Reports of herbicide resistance in annual bluegrass (Poa annua L.) are greater than any other weed species commonly found in turfgrass.
Request PDF | Genetic Diversity for Pink Snow Mold Resistance in Greens-Type Annual Bluegrass | Unseeded annual bluegrass (Poa annua L.) is an important component of. Our results show that SM disease is a major selection pressure for the generation of genetic diversity among annual bluegrass biotypes that evolved on golf greens in northern climates.
SRAP polymorphisms between bulked genotypes with contrasting resistance to SM were identified and could be used as markers for SM resistance in annual by: Annual bluegrass resistance to DNA herbicides, ALS-inhibitors, triazines and glyphosate are concerning in golf course turfgrass.
The repeated use of these herbicides over years exacerbates the spread of resistant biotypes. Superintendents need to develop management programs that delay the establishment of herbicide-resistant annual bluegrass.
Because herbicide resistance by annual bluegrass has recently emerged, it is best to rotate among different pre-emergence herbicides for the best weed grass control.
Many of the common, pre-emergence herbicides that are available to the homeowner are closely related for how they prevent weed seed germination.
Genetic Diversity and Herbicide Resistance in Annual Bluegrass (Poa annua L.) by Lemma W. Mengistu A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Doctor of Philosophy Presented July 2, Commencement June Annual bluegrass (Poa annua L.) may be the most troublesome and studied weed on golf courses in the United States.
Given the genetic variability of annual bluegrass and its ability to adapt to different en - vironments, it is important to understand how control methods vary across environments or regions.
Our objective was to evaluate seven. Genetic diversity and herbicide resistance in annual bluegrass (Poa annua L.) Public Deposited. Analytics × Add. only way to prevent herbicide resistance from developing. Annual bluegrass is a species that is known to have man dif-y ferent biotypes, which indicates genetic diversity.
It should be expected that annual bluegrass populations have the genetic make up to be resistant to many different herbicide modes-of. The resistance heredity traits may vary with herbicide rates used, necessitating the use of multiple relevant herbicide rates (e.g.
discriminating and/or field recommended rates) to evaluate the dominance level of resistance [28, ]. The herbicide resistance epidemic in annual bluegrass in managed turf systems has likely resulted from the interaction of biophysical and social (behavioral) systems.
A turf manager's decision to rely on a narrow spectrum of herbicides for weed control may be influenced by socio-economic factors, such as relative prices and personal values. Genetic diversity in grass weeds. Author: Sarah Morran adapted to cool climate environments.
Annual bluegrass, in contrast, is a weed in both urban and agricultural settings, and one of the most widely growing grasses in the world. • announcement • orchards and vineyards • weed control • herbicide resistance • current research.
Such changes are actually not simple at all and would require multiple genetic changes to achieve such a resistance mechanism. Non-target resistance is most common in glyphosate resistant weeds. Herbicide resistant annual bluegrass. Separate populations of annual bluegrass have developed resistance to almost all herbicides in use.
With high genetic diversity and rapid adaptation to climates and management, this species is found in all U.S. hardiness zones, said Dr. Alec Kowalewski, associate professor at Oregon State University. According to the International Survey of Herbicide Resistant Weeds, annual bluegrass ranks third among all herbicide-resistant weed species.
Hyun‐Sook Tae, Kyung‐Duck Kim, Beom‐Seok Hong, Annual Bluegrass Herbicide Resistance Caused by ALS Gene Mutation in Korea, International Turfgrass Society Research Journal, /itsrj, 13, 1, (), ().
The UTIA studies should result in optimized annual bluegrass management plans that integrate both cultural and chemical techniques to mitigate herbicide-resistance in Tennessee and beyond.
“We will also be involved in extension and outreach activities to communicate findings to turfgrass managers across the United States,” said Brosnan. The most widely grown irrigated crop in the US, turfgrass, is being threatened by annual bluegrass, and Texas A and M AgriLife is leading a project to find solutions.
Texas A and M AgriLife is joining scientists across the nation to address the threat through a project called Research and Extension to Address Herbicide-Resistance Epidemic [ ].
Unseeded annual bluegrass (Poa annua L.) is an important component of golf greens in many regions of Canada and the United States. Although this turfgrass species has desirable playing attributes, it suffers from susceptibility to environmental and biological stresses including subfreezing temperatures and snow molds.
In this study, we compared 29 genotypes collected from golf greens located in. For example, Clay and Underwood () found in cross-resistance studies that triazine-resistant biotypes (i.e., American willowherb, horseweed, annual bluegrass, and common groundsel) were more resistant to uracil herbicides compared to triazine-sensitive biotypes, but not to any other herbicide .Prodiamine is a mitotic inhibiting herbicide regularly used to control annual bluegrass PRE.
A population of annual bluegrass not controlled by prodiamine at 1, g a.i. ha-1 was identified on a golf course in Alcoa, TN, in A whole-plant hydroponics bioassay was used to screen this biotype for prodiamine resistance (PR) compared with a known susceptible population (SS)."The national-scale herbicide-resistance epidemic of annual bluegrass in managed turfgrass systems warrants critical attention by research and extension scientists," Bagavathiannan said.