2 edition of Emergence and growth of nine accessions of diclofop-resistant Italian ryegrass (Lolium multiflorum L.) and multiple resistance to other herbicides found in the catalog.
Emergence and growth of nine accessions of diclofop-resistant Italian ryegrass (Lolium multiflorum L.) and multiple resistance to other herbicides
Ebrima Madi Kunjo
Written in English
|Statement||by Ebrima Madi Kunjo.|
|The Physical Object|
|Pagination||61 leaves, bound :|
|Number of Pages||61|
Glyphosate resistant Italian ryegrass (Lolium perenne ssp. multiflorum), which was first documented in , has proven to be very problematic in corn (Zea mays) production. Italian ryegrass can cause issues with corn planting and also with stand development of a corn Smooth barley has emerged as a problematic weed in cereal crops of South Australia. After the recent reports of herbicide resistance and increase in seed dormancy in smooth barley, it was considered important to determine the herbicide resistance status and seedbank behavior of field populations of this weed species. A field survey was undertaken in the Upper North and Eyre Peninsula regions
Confirmation and control of propanil-resistant and quinclorac-resistant barnyardgrass in rice. Weed Technol. Ribas AV, FP Lamego, MM Trezzi, R dePrado, NR Burgos. Herbicide-resistant weed management using sensitivity analysis of the weed population growth curve. Pesticidas: r. ecotoxicol. e meio ambiente, Curitiba › U of A. At site 2, Italian ryegrass control at DAT was 0% for fenoxaprop-ethyl, 25% for clodinafop-propargyl, 32% for tralkoxydim, 62% for clethodim, and 42% for pinoxaden. Based on these results, both populations are resistant to APP herbicides and the CHD tralkoxydim, but not to
Weedy plant species that have evolved resistance to herbicides due to enhanced metabolic capacity to detoxify herbicides (metabolic resistance) are a major issue. Metabolic herbicide resistance in weedy plant species first became evident in the s in Australia (in Lolium rigidum) and the United Kingdom (in Alopecurus myosuroides) and is now increasingly recognized in several crop-weed The resistant population reached the inflorescence emergence and flowering stages in less time by and GDD, respectively, at a crop density of 96 winter wheat plants m-2 with no differences registered at other densities. This study did not observe a fitness cost to herbicide resistance, as often
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Emergence and growth of nine accessions of diclofop-resistant Italian ryegrass (Lolium multiflorum L.) and multiple resistance to other herbicides. By E.M. Kunjo.
Abstract. Thesis ( in Crop Science) - Oregon State University, Corvallis (USA Emergence and growth of nine accessions of diclofop-resistant Italian ryegrass (Lolium multiflorum L.) and multiple resistance to other herbicides.
Abstract. Graduation date: Year: OAI identifier: oai: Diclofop-resistant Italian ryegrass is a major weed problem in wheat production. This study aimed to determine the resistance pattern of diclofop-resistant Italian ryegrass accessions from the As compared to a wild type Italian ryegrass biotype, the GR50 values for diclofop, haloxyfop, and sethoxydim were approximately, and 2-fold greater, respectively, for the resistant :// The addition of chlorsulfuron ( g ai/ha field, g/ha greenhouse) to kg/ha diclofop reduced Italian ryegrass control 27% in the field and increased Italian ryegrass fresh weights in Diclofop-resistant Italian ryegrass is a major weed problem in wheat production.
This study aimed to determine the resistance pattern of diclofop-resistant Italian ryegrass accessions from the southern United States to the latest commercialized herbicides for wheat production, pinoxaden and mesosulfuron, and to other acetolactate synthase (ALS Experiments were conducted at Plains, GA, to evaluate diclofop-susceptible Italian ryegrass control in a single-gene imidazolinone (IMI)-resistant wheat using imazamox, mesosulfuron, and :// Resistance to herbicides in Italian ryegrass (Lolium perenne L.
ssp. multiflorum (Lam.) Husnot) is an economically important herbicide-resistance issue in world agriculture. Diclofop-resistant ryegrass is the number one weed problem in Arkansas wheat.
Field studies were conducted from through at Bredlow corner and Fayetteville, Arkansas, USA to determine the effect of herbicide AE F 03 at 15 or 18 g ai/ha with or without methylated seed oil controlled both diclofop-sensitive and -resistant Italian ryegrass 82 to 99% and reduced inflorescence emergence 59 to 98%.
Both Italian ryegrass and perennial ryegrass are good soil stabilizers and therefore are sometimes deliberately seeded with more aesthetically pleasing grasses to aid establishment. However, because both show vigorous seedling growth and thus are very competitive, the ryegrass component in the final stand often needs to be Sterile oat (Avena sterilis) is the most widely distributed, abundant and harmful weed in the winter cereals grown in effective control has relied for the past three decades upon the ACCase-inhibiting herbicides.
However, recently many growers in northern and central Greece have experienced reduced sterile oat control after the application of fenoxaprop-p-ethyl or clodinafop Italian ryegrass is one of the most economically damaging glyphosate-resistant weeds in cereal crops.
An understanding of the basic biology of resistant populations, including their growth and development relative to a segregating susceptible population collected from same geographical location, may yield information helpful in the management Glyphosate-Resistant Italian Ryegrass (Lolium multiflorum) in California: Influence of Environmental Factors on Seed Germination and Seedling Emergence of American Sloughgrass (Beckmannia syzigachne) Resistance Profile of Diclofop-Resistant Italian Ryegrass (Lolium multiflorum) to ACCase- and ALS-Inhibiting Herbicides in Arkansas, :// Three Italian Lolium weed populations, one susceptible and two resistant to diclofop, were characterized by the technique of inter simple sequence repeats (ISSR).
The goal of this study was to taxonomically identify these Lolium populations as well as to evaluate evidence for introgression of ISSR fragments from Festuca and the potential role Of the 48 accessions sampled, nine were susceptible, 10 were slightly resistant, 18 were moderately resistant, and 11 were highly resistant.
Four resistant accessions plus the susceptible standard were selected for a subsequent control study. Diclofop reduced fresh weights at least 69% and clodinafop reduced fresh weights at least 71% across The present study evaluated the forage production, nitrogen fixation and the qualitative characteristics of different accessions of Trifolium mutabile, a new species of annual clover, collected in southern Italy.
Forage traits were assessed by harvesting plants at the vegetative stage (stem elongation) and the subsequent regrowth at the flowering stage (inflorescence emergence-main shoot).
Adaptability of maize—Italian ryegrass cropping to variable sowing dates by life cycle assessment in southern Kyushu,Japan; Effects of conservative tillage on the productive performance of Hunnigreen on the fallow of wheat stubbles; SO_4~ (2-) uptake and its assimilation in ?baseid=ZGCY Nine germinated seedlings at similar growth stage were transplanted into pots (15 × 15 × 20 cm) filled with a standard potting mix (60% silty loam soil, 15% sand, 15% perlite and 10% peat).
To better mimic field conditions, pots were kept outside in a semi-controlled environment, and the soil water content was maintained at or near field Population is weakly resistant to both diclofop and tralkoxydim (survival RI of for both herbicides), whilst and show only a small shift in susceptibility to diclofop (survival RI of andrespectively).
The general lower efficacy exerted by diclofop, when compared with other herbicides, can be explained by the Non-target-site resistance (NTSR) to herbicides in weeds can be conferred as a result of the alteration of one or more physiological processes, including herbicide absorption, translocation, sequestration, and metabolism.
The mechanisms of NTSR are generally more complex to decipher than target-site resistance (TSR) and can impart cross-resistance to herbicides with different modes of ://.
Herbicide‐resistant Lolium multiflorum (Italian rye‐grass) was first reported in the UK in and had been confirmed on 25 farms by In this study, resistance to five herbicides belonging to the aryloxyphenoxypropionate, cyclohexanedione and phenyl‐urea classes was determined in six populations of L multiflorum from the UK under glasshouse and simulated field conditions KEYWORDS: Glyphosate-resistant crops, Glyphosate resistance management, grower survey, Herbicide mode of action Read Abstract + Ina grower survey was administered to 1, growers in 22 states to determine changes in weed management in the United States from to 2 days ago Enhanced adaptation and mitigation of weeds is a growing threat to agriculture.
Weeds, such as junglerice, have readily acquired resistance alleles and genetic mechanisms allowing them to sustain herbicide application, compete with the crop, and even mimic the crop. More interestingly, their abiotic stress response systems (drought tolerance, submergence, heat/temperature tolerance, etc.,)