Download or read book Studies on Sclerotinia Sclerotiorum Sclerotinia Stem Rot on Soybeans written by Dael Desiree Visser and published by . This book was released on 2007 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Reaction of Soybean to SCLEROTINIA SCLEROTIORUM Causal Agent of Stem Rot of Soybean written by Laura Beth Kao and published by . This book was released on 1987 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological and Quantitative Studies of Occurrence of Soybean Sclerotinia Stem Rot Caused by Sclerotinia Sclerotiorum in the North Central Region of the United States written by Asimina Leonidas Mila and published by . This book was released on 2002 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the early 90's, Sclerotinia stem rot of soybeans (SSR), caused by Sclerotinia sclerotiorum (Lib.) de Bary, has emerged as a serious problem in the north-central soybean production region of the United States. Understanding the epidemiology of Sclerotinia sclerotiorum and developing models that explain, and eventually may forecast, the risk of SSR occurrence in the region may help extension specialists and growers manage the disease. Regional prevalence of soybean SSR was modeled using historical data collected between 1995 and 1998 from 4 states of the North-Central Region of the United States (Illinois, Iowa, Minnesota and Ohio). Tillage practices, soil texture, and summer weather variables from the National Oceanic and Atmospheric Administration (average monthly air temperature and total precipitation during July and August) were used as input variables. Logistic regression was used to estimate the probability of stem rot prevalence in the four states. A developed model had high explanatory power (77.8%). Bayesian analysis suggested that the four-year data set used in the analysis may not be informative enough to produce reliable estimates of the effect of some explanatory variables on SSR prevalence. The variable most sensitive to extra-sample incorporated information was precipitation of August. The relationships between management practices, weather variables and soybean yield were examined using multiple linear regression to investigate whether high potential yield environments are also high SSR risk environments. Occurrence of SSR was indeed found to be strongly associated with high attainable yield. Differences in soil temperature and water potential have been observed under different combinations of tillage regimes and planting row widths, with soil surface temperature and moisture fluctuating more under the combination of no tillage and wide rows than under other combinations. Experiments were conducted to determine the effects of soil temperature and water potential fluctuations on sclerotium germination, and apothecium production of Sclerotinia sclerotiorum. Our results showed that small temperature fluctuations increased sclerotia germination and apothecium production compared to large or no temperature fluctuations. Moisture fluctuations were detrimental to sclerotium germination and apothecium production, with the constant saturation treatment yielding the highest number of germinated sclerotia and apothecia.
Download or read book Studies on Sclerotinia Sclerotiorum on Soybeans Gylcine Max written by Vicki Lee Radke and published by . This book was released on 1981 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of an Assay for Resistance to Sclerotinia Sclerotiorum Infection of Soybean and Investigations Into the Cause of the Variability Within a Genotype for Tolerance to the Fungus written by Clay Hurd Sneller and published by . This book was released on 1987 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trichoderma written by Mohammad Manjur Shah and published by BoD – Books on Demand. This book was released on 2019-09-04 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trichoderma is a genus of fungi that are present in all soils, where they are the most prevalent culturable fungi. They are also the most successful biofungicides used in today's agriculture. These green-colored fungi are well known for their antifungal and plant-growth-stimulating effects. This book provides comprehensive information on Trichoderma and its use in medical, agricultural and industrial applications. Section I focuses mainly on identification of Trichoderma species, and Section II is concerned with Trichoderma as a biological control agent. Chapters in these sections cover topics ranging from taxonomic status and biodiversity to biochemical analysis and bio-control application.
Download or read book Management of Soybean Glycine Max L White Mold by Reducing Sclerotinia Sclerotiorum Population Using Beneficial Microorganisms written by Wenting Zeng and published by . This book was released on 2010 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Refinement of Integrated Management Strategies for Sclerotinia Stem Rot of Soybean written by Jaime Fay Willbur and published by . This book was released on 2018 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sclerotinia stem rot (SSR), or white mold, is caused by Sclerotinia sclerotiorum and is one of the top ten yield reducing diseases of soybean worldwide. Complete commercial resistance is confounded by an incomplete understanding of resistance mechanisms and the diversity within S. sclerotiorum populations. Characterization of a diverse isolate collection facilitated the selection of a representative panel of isolates for use in ongoing germplasm resistance evaluations. These isolates were used to further identify candidate germplasm lines exhibiting durable SSR resistance for further integration into commercial soybean cultivars. Monitoring infection of resistant and susceptible lines further helped to understand S. sclerotiorum infection and potential resistance mechanisms. Chemical control is also currently incomplete and, in some cases, unnecessary as disease development requires conditions conducive for simultaneous apothecial germination, ascospore release, and soybean flowering. Multiple site-years of fungicide efficacy trials were evaluated using meta-analyses to identify effective control programs, which will assist growers in making economical management decisions. Risk assessment tools are sometimes used to more accurately predict the timing of effective fungicide applications; however, reliable tools were not available in soybean systems prior to this research. In the SSR pathosystem, dense canopies, cool temperatures, high relative humidity, and moist soil conditions have been shown to favor S. sclerotiorum infection and subsequent disease development. Additionally, studies have shown that apothecial development is sensitive to a narrow range of ultraviolet wavelengths (276-319 nm). Virtual weather data and detailed epidemiological studies have led to the development and validation of models for non-irrigated and irrigated fields which predict apothecial presence based on 30-day averages of mean air temperature, relative humidity, and maximum leaf wetness. These models will be incorporated into a mobile web-based recommendation tool. Moreover, controlled environment and in-field light studies have identified a crucial range of light (295-330 nm) which are required for apothecial development and could be targeted to further improvement of SSR management. Overall, the development of germplasm with broad-spectrum resistance, the study of resistance mechanisms, multiple site-year fungicide efficacy evaluations, and an optimized spray advisory system will provide a new, fresh approach to integrated management of SSR in soybean.
Download or read book Sclerotinia Diseases of Crop Plants Biology Ecology and Disease Management written by G. S. Saharan and published by Springer Science & Business Media. This book was released on 2008-09-01 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fungus Sclerotinia has always been a fancy and interesting subject of research both for the mycologists and pathologists. More than 250 species of the fungus have been reported in different host plants all over the world that cause heavy economic losses. It was a challenge to discover weak links in the disease cycle to manage Sclerotinia diseases of large number of crops. For researchers and s- dents, it has been a matter of concern, how to access voluminous literature on Sclerotinia scattered in different journals, reviews, proceedings of symposia, workshops, books, abstracts etc. to get a comprehensive picture. With the pub- cation of book on ‘Sclerotinia’, it has now become quite clear that now only three species of Sclerotinia viz. , S. sclerotiorum, S. minor and S. trifoliorum are valid. The authors have made an excellent attempt to compile all the available infor- tion on various aspects of the fungus Sclerotinia. The information generated so far has been presented in different chapters. After introducing the subject various aspects viz. , the diseases, symptomatology, disease assessment, its distribution, economic importance, the pathogen, its taxonomy, nomenclature, reproduction, reproductive structures with fine details, variability, perpetuation, infection and pathogenesis, biochemical, molecular and physiological aspects of host-pathogen interaction, seed infection, disease cycle, epidemiology and forecasting, host resistance with sources of resistance, mechanism of resistance and other mana- ment strategies have been covered.
Download or read book Modernizing Integrated Management Practices for Sclerotinia Stem Rot of Soybean Glycine Max written by Richard Webster (Ph.D.) and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean production in the Upper Midwest region of the United States is consistently threatened by Sclerotinia stem rot (SSR), caused by the fungal pathogen Sclerotinia sclerotiorum. Management practices for this disease have historically been studied in depth. However, a reevaluation and modernization of these practices is greatly needed. To achieve this, many methods of control are being examined such as the assessment of integrating multiple cultural practices, the reassessment of chemical controls, the development of improved genetic resistance through both classical breeding and reverse genetics, and the integration of resistant genotypes into predictive models. From this research, the optimum cultural and chemical practices were identified for controlling SSR across the Midwest. These practices were examined for their effect on partial profits to understand their economic feasibility. Through breeding efforts, three elite soybean genotypes were identified with high levels of resistance to SSR, and more early-generation breeding lines are being progressed from additional breeding populations. Furthermore, four breeding lines were identified as having differential consistent responses to S. sclerotiorum, and these four lines were established as standardized checks. Using these four check lines, the integration of resistance into S. sclerotiorum apothecial models is being studied to improve predictive accuracy. Collectively, these research efforts will help to modernize management and control of SSR from both research and production perspectives.
Download or read book Environmental and Biological Factors Affecting Resistance and Susceptibility to Sclerotinia Sclerotiorum in Soybean written by Angelique J. Peltier and published by . This book was released on 2008 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Prediction Models for Sclerotinia Stem Rot Sclerotinia Sclerotiorum of Soybean Glycine Max in Quebec written by Césarée Morier-Gxoyiya and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In Québec's soybean (Glycine max (L.) Merr.) farms, Sclerotinia stem rot (SSR), a disease caused by the fungal pathogen Sclerotinia sclerotiorum (Lib.) de Bary, is commonly controlled by chemical fungicides sprayed during the crop's flowering growth stages. However, fungicide use efficiency varies largely based on the risk of disease outbreak, which is strongly influenced by agro-environmental conditions. Unnecessary or improperly timed fungicide applications are costly not only economically, but also environmentally. Prediction models can guide disease management decisions by informing of the necessity and timing of fungicide applications. In this project, S. sclerotiorum sclerotia were placed in commercial and research fields across soybean-producing regions of Québec. The goal was to assess the relationship between environmental and agronomic conditions and carpogenic germination of S. sclerotiorum. The predictive ability of Sclerotinia-related logistic regression models was evaluated under Québec's climatic conditions using data collected over three growing seasons. Based on the nature of the models selected, the predictive performance was assessed for two disease indicators: disease severity and apothecia presence. Upon validation and improvement, the models with the highest accuracy and predictive ability could be implemented in an integrated decision-support system for soybean producers in Québec"--
Download or read book Epidemiological Studies on Sclerotinia Stem Rot Caused by Sclerotinia Sclerotiorum Lib de Bary on Canola written by Issa Suleiman Qandah and published by . This book was released on 2008 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Inoculation and Disease Evaluation Techniques for Sclerotinia Stalk Rot Sclerotinia Sclerotiorum of Soybean written by Chrisna Botha and published by . This book was released on 2007 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Soybean Research Conference III written by Richard Shibles and published by CRC Press. This book was released on 2022-02-26 with total page 1283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume consists of full length manuscripts of 159 of the 165 invited papers presented at World Soybean Research Conference III that was held in the Scheman Continuing Education Building at Iowa State University August 12-17, 1984. The authors, widely recognized as world authorities in their fields, represent all aspects of soybean research activity: breeding and genetics, crop and soil management, economics, entomology, food science, international programs, nematology, pathology, physiology, plant nutrition, rhizobiology, utilization, and weed science. This proceedings, which contains more than 1200 pages of information including many tables and figures, represents the most extensive compilation of soybean research results since the previous proceedings were published in 1980. It should be of value to research scientists, students and administrators alike.
Download or read book Sclerotinia Stem Rot of Soybeans written by J. R. Steadman and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life cycle, symptoms, and control measures of sclerotinia stem rot of soybeans is discussed.
Download or read book Soybean Disease Research on Green Stem Disorder Effects of Seed Treatments on Sclerotinia Stem Rot and Resistance to Cercospora Leaf Blight written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
