Download or read book Barley Yellow Dwarf of Winter Wheat written by Gordon Lee Cisar and published by . This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Barley Yellow Dwarf Virus in Winter Wheat written by Otis C. Maloy and published by . This book was released on 1982 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Barley Yellow Dwarf Virus and Cereal Yellow Dwarf Virus in Winter Wheat in Alabama written by Hendrik W. Van Riessen and published by . This book was released on 2002 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Barley Yellow Dwarf written by Cleora J. D'Arcy and published by American Phytopathological Society. This book was released on 1995 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The disease: symptomatology and host range of barley yellow dwarf; Distribution and economic importance of barley yellow dwarf; Epidemiology of barley yellow dwarf in Europe; Epidemiology of barley yellow dwarf in Australasia; Interactions of barley yellow dwarf viruses: cross-protection and interactions with other pathogens and with abiotic factors; The viruses: purification and viron characterization of barley yellow dwarf viruses; Genome structure and function of barley yellow dwarf viruses; Taxonomy of barley yellow dwarf viruses; The vectors: biology and taxonomy of vectors of barley yellow dwarf viruses; Aphid transmission of barley yellow dwarf viruses: interactions between viruses, and host plants; Control: barley yellow dwarf: diagnostic procedures and reagents; Cultural chemical, and biological methods for the control of barley yellow dwarf; Host plant tolerance or resistance for control of barley yellow dwarf; Prospects for genetically engineered resistance to barley yellow dwarf viruses.
Download or read book Plant Diseases Barley Yellow Dwarf Virus in Winter Wheat written by Washington State University. Cooperative Extension Service and published by . This book was released on 1983 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Barley Yellow Dwarf and Aphid Feeding on Winter Wheat and Rye written by Benjamin Moreno and published by . This book was released on 1989 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wheat Yield and Barley Yellow Dwarf Virus Infection as Affected by Planting Date Ahd Chemical Control written by Salani Nkhori and published by . This book was released on 1997 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stunting as an Indicator of Barley Yellow Dwarf Severity in Winter Wheat and Spring Oats and Genetics of Tolerance to Barley Yellow Dwarf Virus in Oats written by Andrea Rochelle Collett McNabb and published by . This book was released on 2007 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Barley Yellow Dwarf Virs Under Conservation Tillage Practices in Winter Wheat written by Jocelyn L. Smith and published by . This book was released on 2006 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Germplasm Enhancement and Improvement of Evaluation Methodology for Barley Yellow Dwarf Disease in Winter Wheat written by Ellen M. Bauske and published by . This book was released on 1992 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progeny from three cycles of a modified recurrent selection scheme were field tested to determine the effectiveness of this strategy for improving tolerance to barley yellow dwarf virus (BYDV-PAV-IL) in a winter wheat population. Symptom severity was not reduced by the selection scheme. The percentage yield of the control was unaffected by the selection scheme. Little genetic variability of symptom expression was detected in the three cycles and the parent population. The effects of initial dosage of BYDV on symptom expression in spring oats and winter wheat was determined. Zero to 126 Rhopalosiphum padi vectoring BYDV-PAV-IL were placed on four oat and four wheat cultivars. At an early disease evaluation all oat cultivars showed a linear response to increasing dosage. At a later disease rating, the response of Don, Hazel, and Ogle was curvilinear, suggesting a threshold of approximately 54 aphids/hill. IL86-5262 had a linear response at the late evaluation. Yield of Hazel and Ogle was unaffected by increasing dosage. The wheat cultivars Abe and Cardinal responded linearly at early evaluation while the response of Caldwell was curvilinear with a threshold of 90 aphids/hill. Yield was affected similarly. No dosage effects were detected on Abe. In wheat cultivars symptom expression at heading was unaffected by dosage. The results of seven uniformity trials on two brands of microplates, with two monoclonal triple-antibody-sandwich ELISA systems done by two operators indicate that absorbance values were affected by plate brand and operator technique. Several arrangements of 48 treatments with two replications were imposed on the plates. When replications of a treatment were paired in either rows or columns, differences between treatment means were confounded with row and column differences found on the plates, indicating the need for an experimental design. Both the randomized complete block (RCB) design and the alpha (0,1) one restrictional resolvable incomplete block design (alpha design) allowed for more precision than the completely randomized design. The alpha design was more effective than the RCB design.
Download or read book Barley Yellow Dwarf Disease written by Monique Henry and published by CIMMYT. This book was released on 2002* with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lost Crops of Africa written by National Research Council and published by National Academies Press. This book was released on 1996-02-14 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scenes of starvation have drawn the world's attention to Africa's agricultural and environmental crisis. Some observers question whether this continent can ever hope to feed its growing population. Yet there is an overlooked food resource in sub-Saharan Africa that has vast potential: native food plants. When experts were asked to nominate African food plants for inclusion in a new book, a list of 30 species grew quickly to hundreds. All in all, Africa has more than 2,000 native grains and fruitsâ€""lost" species due for rediscovery and exploitation. This volume focuses on native cereals, including: African rice, reserved until recently as a luxury food for religious rituals. Finger millet, neglected internationally although it is a staple for millions. Fonio (acha), probably the oldest African cereal and sometimes called "hungry rice." Pearl millet, a widely used grain that still holds great untapped potential. Sorghum, with prospects for making the twenty-first century the "century of sorghum." Tef, in many ways ideal but only now enjoying budding commercial production. Other cultivated and wild grains. This readable and engaging book dispels myths, often based on Western bias, about the nutritional value, flavor, and yield of these African grains. Designed as a tool for economic development, the volume is organized with increasing levels of detail to meet the needs of both lay and professional readers. The authors present the available information on where and how each grain is grown, harvested, and processed, and they list its benefits and limitations as a food source. The authors describe "next steps" for increasing the use of each grain, outline research needs, and address issues in building commercial production. Sidebars cover such interesting points as the potential use of gene mapping and other "high-tech" agricultural techniques on these grains. This fact-filled volume will be of great interest to agricultural experts, entrepreneurs, researchers, and individuals concerned about restoring food production, environmental health, and economic opportunity in sub-Saharan Africa. Selection, Newbridge Garden Book Club
Download or read book Barley Yellow Dwarf written by George W. Bruehl and published by . This book was released on 1961 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Food Grains written by Colin W Wrigley and published by Academic Press. This book was released on 2015-12-17 with total page 1956 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Food Grains, Four Volume Set is an in-depth and authoritative reference covering all areas of grain science. Coverage includes everything from the genetics of grains to the commercial, economic and social aspects of this important food source. Also covered are the biology and chemistry of grains, the applied aspects of grain production and the processing of grains into various food and beverage products. With the paramount role of cereals as a global food source, this Encyclopedia is sure to become the standard reference work in the field of science. Also available online via ScienceDirect – featuring extensive browsing, searching, and internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy. For more information, pricing options and availability visit www.info.sciencedirect.com. Written from an international perspective the Encyclopedia concentrates on the food uses of grains, but details are also provided about the wider roles of grains Well organized and accessible, it is the ideal resource for students, researchers and professionals seeking an authoritative overview on any particular aspect of grain science This second edition has four print volumes which provides over 200 articles on food grains Includes extensive cross-referencing and "Further Reading" lists at the end of each article for deeper exploration into the topic This edition also includes useful items for students and teachers alike, with Topic Highlights, Learning objectives, Exercises for Revision and exercises to explore the topic further
Download or read book Yellow Dwarf written by United States. Agricultural Research Service and published by . This book was released on 1961 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying Yield Losses Due to Barley Yellow Dwarf on Winter Wheat in Kansas Using Disease Phenotypic Data written by Genna Marie Gaunce and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Barley yellow dwarf (BYD) is one of the most important wheat diseases in the state of Kansas. Despite the development of cultivars with improved levels of resistance to BYD, little is known about the impact that this resistance has on yield loss from the disease. The intent of this research was to estimate yield loss in winter wheat cultivars in Kansas due to BYD and quantify the reduction in losses associated with resistant cultivars. During seven years, BYD disease incidence was visually assessed on numerous winter wheat cultivars in replicated field nurseries. Cultivars were planted about three weeks early to promote disease. When grain yields were regressed against BYD incidence scores, negative linear relationships significantly fit the data for each year and for the combined dataset covering all seven years. The models showed that, depending upon the year, 19-48% (average 33%) of the yields was explained by BYD incidence. For the combined dataset, 29% of the relative yield was explained by BYD incidence. The models predicted that cultivars showing high disease incidence had 25-86% (average 49%) less yield than a hypothetical cultivar that showed zero incidence. Using the models, the moderate level of resistance in the cultivar Everest was calculated to reduce yield loss from BYD by about 73%. Therefore, utilizing visual BYD symptom evaluations in Kansas, coupled with grain yields, is useful to estimate yield loss from the disease. Furthermore, linear models that incorporate those parameters can be used to calculate the impact of improving cultivar resistance to BYD on yield losses.
Download or read book Impact of Aphids Species and Barley Yellow Dwarf Virus on Soft Red Winter Wheat written by Christopher Zwiener and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Barley yellow dwarf virus is one of the most widespread viral diseases of wheat. Yield reductions up to 70% have resulted from barley yellow dwarf virus (BYDV) infection. Several aphid spp. transmit BYDV. In Missouri, the four common aphids that transmit BYDV are: Rhopalosiphum padi (L.), Schizaphis graminum (Rondani), Sitobion avenae (F.), and Rhopalosiphum maidis (L.). Warm winters have increased the incidence of BYD, triggering producer interest in controlling the aphid vectors. In addition, a species shift in cereal aphids in Missouri has caused previous thresholds to become outdated. For this reason yield loss in soft red winter wheat caused by aphid transmission of barley yellow dwarf virus was measured over a two-year period in central Missouri. The experimental design was a randomized complete block factorial with four replications. The plot factors were variety, seed treatment, and foliar insecticide treatment timings. The four wheat varieties utilized were: 'Truman', 'Ernie', 'Roane', and 'Pioneer 25R37'. The seed treatment was the presence or absence of imidacloprid (0.94 g [AI]/ha). The foliar insecticide treatment included: no application, fall only, fall followed by spring or an application of lambda-cyhalothrin (75.6 g [AI]/ha) every 28 days. Aphid and beneficial species were identified and counted on ten randomly chosen plants per plot every three weeks from crop emergence to physiological maturity. Leaf samples were pulled from each plot at heading and enzyme-linked immunosorbent assay (ELISA) was run to determine the percentage of plots infected with BYDV. The bird-cherry oat aphid was the most common and economically important species, accounting for> 90% of the total aphids. S. graminum, S. avenae, and R. maidis comprised the remainder of the aphids. Aphid numbers peaked at wheat jointing in 2003 with 771 bird-cherry oat aphids per meter-row. In the 2003-2004 growing season aphid numbers averaged 7 aphids per meter-row in the fall and peaked at 246 aphids per meter-row at jointing. Wheat grain yield was reduced 17 and 13% in 2003 and 2004 respectively. Thousand kernel weights were reduced 10 and 5% in the untreated plots when compared to the treated control in 2003, 2004 respectively. PAV, a strain of BYDV, accounted for 84 and 81% of the symptomatic plots that tested positive for BYDV in 2003 and 2004, respectively. Our results indicate that economic thresholds for bird-cherry oat aphid are 16 aphids per meter-row in the fall and 164 aphids per meter-row at jointing.
