Download or read book Biological Control of Soybean cyst Nematode Heterodera Glycines with a Soil borne Fungus written by Dong-Geun Kim and published by . This book was released on 1989 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biology and Management of the Soybean Cyst Nematode written by Robert D. Riggs and published by American Phytopathological Society. This book was released on 1992 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 History, distribution, and economics. 2 Systematics and morphology. 3 Epiphytology and life cycle. 4 Cellular responses to infection. 5 Population dynamics. 6 Genetics. 7 The race concept. 8 Nematode race identification, A look to the future. 9 Interactions with other organisms. 10 Host range. 11 Chemical control. 12 Management by cultural practices. 13 Biological control. 14 Breeding for resistance to soybean cyst nematode. 15 Cytopathological reactions of resistant soybean plants to nematode invasion. 16 Tolerance in soybean.

Download or read book Evaluations of Biological Control Agents for the Management of Soybean Cyst Nematode Heterodera Glycines in Soybean Glycine Max L Merr written by Kelsie M. Musil and published by . This book was released on 2016 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soybean cyst nematode (SCN, Heterodera glycines) is the most yield limiting pathogen of soybeans (Glycine max L. Merr.). Current management strategies of crop rotation and using resistant varieties are not completely effective and alternative management strategies are needed. Commercial seed treatments with biological agents are available to protect against yield loss from SCN, but have not been evaluated in Nebraska. Field studies were conducted in eight Nebraska locations (six infested with SCN and two non-infested) during 2014 and 2015 to evaluate seed treatment effects on soybean establishment, SCN population density, and yield. The seed treatments were CruiserMaxx® Advanced, Clariva®Complete Beans containing Clariva®pn (Pasteuria nishizawae), and Poncho®/ VOTiVO® containing Bacillus firmus I-1582; all treatments contained the same fungicides and an insecticide with the same mode of action. Average yields in the SCN infested fields ranged from 45 to 72 bu/A and initial SCN population densities ranged from 200 to 4,300 eggs/100 cc's of soil. No statistical differences were found among the three treatments in either yield or SCN reproduction at any individual location or when the SCN infested locations were combined in either growing season. The use of cover crops (cereal rye, Secale cereale), and other bacteria have inconsistently reduced SCN populations in previous studies. The use a cover crop as a means to establish a biocontrol agent has not been investigated. Greenhouse experiments were conducted to evaluate the ability of the bacterium Lysobacter enzymogenes C3 to colonize the rhizospheres of cereal rye and soybean from populations applied to seed. The bacterium was found to colonize cereal rye roots to higher population levels than soybean over 4 week periods. C3 root populations on cereal rye increased by a thousand fold from seed populations. Based on these studies the potential for biocontrol for SCN exists, but more research is needed to determine optimum conditions for biocontrol agents to be effective tools in sustainable soybean production..

Download or read book Evaluation of Heterodera Glycines Macrophomina Phaseolina Interactions on Soybean written by Horacio Daniel Lopez Nicora and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: oth Heterodera glycines, the soybean cyst nematode, and the fungus Macrophomina phaseolina, the causal agent of soybean charcoal rot, are damaging soil-borne pathogens. Many studies have been conducted to understand the individual effect of each pathogen on soybean. Little is known, however, of the effect when both soil-borne pathogens co-infest soybean fields. We examined this effect in three different studies. The first was a survey to determine the distribution and abundance of both pathogens in agricultural fields across Ohio. Soil samples were collected from soybean fields; H. glycines and M. phaseolina were extracted and quantified from each soil sample. More than 77% of the samples tested positive for the presence of both pathogens. Surprisingly, over 75% of the growers with H. glycines infested fields were unaware they had this problem. Information on the distribution and abundance of these pathogens in Ohio is extremely useful for alerting growers of potential yield reduction and recommending integrated pest management. In the second study, fields with different levels of each pathogen were identified during three growing seasons. From each field, soybean yield and abundance of H. glycines and M. phaseolina were obtained and used in a spatial regression analysis. We evaluated the effect of each pathogen and their interaction on soybean yield. Based on spatial regression analysis there was a significant interaction effect between H. glycines and M. phaseolina on soybean yield for fields with high initial inoculum. Observations from these fields helped us design the third study in which we expanded on basic nematology and plant pathology techniques, and used plant genetics to evaluate and better understand the field biology of these soil-borne pathogens. Experiments were conducted in the greenhouse and in two fields infested with H. glycines (HG) Type 2.5.7 and M. phaseolina in 2013 and 2014, respectively. Soybean lines developed through four backcrosses (BC4) were used; half of the lines were predicted to have the H. glycines resistance allele at Rhg1 from PI 88788 based on a linked genetic marker and the other half did not have the resistance marker. In a split-plot experimental design, soybean genotypes were planted in adjacent plots, one with M. phaseolina added pre-plant and the other without. Soybean yield reduction took place with increasing levels of H. glycines initial population in both fields. In addition, soybean emergence in plots infested with M. phaseolina was reduced by over 10% and 35% compared with uninfested plots in the 2013 and 2014 field experiments, respectively. Results from these studies showed that the marker alleles of lines for Rhg1 and the greenhouse studies reliably predicted the response of soybean lines to HG Type 0 and HG Type 2.5.7. In the field studies, however, the response of these lines to HG Type 2.5.7 was dependent on H. glycines initial population. Environmental conditions in 2013 and 2014 were not conducive for the development of charcoal rot and the disease did not develop. The findings of these projects will help improve integrated pest management recommendations to growers for sustainable crop production.

Download or read book Fungi Colonizing Cysts of Heterodera Glycines written by Lori Marie Carris 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 Characterization of Soil Microbiome Associated with Soybean and Soybean Cyst Nematode Heterodera Glycines in Eastern Canada written by Guillaume Trépanier and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Soybean is already well established in Canada and acreages are still increasing rapidly in many provinces, including Quebec. This crop offers many advantages to growers, obviously economically, but also because of the ecological services it renders such as nitrogen fixation. However, this expansion in cultivated area has also favored the spread of the soybean cyst nematode (SCN), Heterodera glycines Ichinohe (1952). This plant-parasitic nematode is present in Ontario since 1987 and has been discovered for the first time in Quebec in 2013. Currently, the only viable way to manage SCN is the use of resistant soybean cultivars and rotation with non-host crops. This method has proven to be effective to reduce SCN populations to a low level but is in no way able to eradicate these nematodes. However, since the resistance is only partial, SCN populations quickly adapt and overcome the mechanism involved. Therefore, there is a need to find new ways to fight this pest before the current pest management approach become completely useless. One of these possibilities is based on studies that have demonstrated the nematicidal properties of soils where soybean was cultivated in monoculture for a long period of time. These so-called suppressive soils were shown to contain microorganisms, including bacteria and fungi that demonstrated antagonistic effects on SCN.Using a metagenomic approach, the present study characterized for the first time the soil microbiome associated with soybean in Eastern Canada. Additionally, the internal microbiome of SCN cysts (cystobiomes) was studied. Results seem to indicate that soybean strongly influence the soil microbiome on a short period of time and that the cystobiome is different from the soil microbiome. The data analysis made to fulfill the two primary objectives of this study also revealed possible new ways to manage SCN infestations. Amongst them, high aluminium concentrations in the soil and simultaneous presence of specific bacterial and fungal species seem to be negatively correlated to the viability of SCN"--

Download or read book Practical Plant Nematology written by Rosa H. Manzanilla-López and published by . This book was released on 2012 with total page 883 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nematode Interactions written by M. Wajid Khan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nematode interactions are important biological phenomena and of great significance in agriculture. It is a fascinating subject which is multidisciplinary by nature, and concerns any scientist involved with plant health. There have been marked advances in our knowledge of various aspects of the subject in the last two decades. This study area has been the subject of several reviews, but there was no exclusive text on the subject. This has stressed the need to document the information, developing a unifying theme which treated nematode interactions in a holistic manner. This book is about the inter action of plant-parasitic nematodes with other plant pathogens or root symbionts, the nature of their associations, their impact on the host and con sequential interactive effects on the involved organisms. Since nematodes are at the centre of the theme, the responsibility of understanding of other plant pathogens dealt with in this book is largely delegated to the reader. I have limited the book content to interactions with biotic pathogens and root symbionts only, for various reasons. The book embodies 16 chapters, and attempts to present balanced infor mation on various aspects of nematode interactions with other plant pathogens and root symbionts. Some chapters describe general aspects of the subject. Interactions of nematodes with specific groups of organisms are addressed in the remaining chapters.

Download or read book Investigation on the Nort American Isolate of Pasteuria Sp written by Atibalentja Ndeme and published by . This book was released on 1999 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gene Expression Systems in Fungi Advancements and Applications written by Monika Schmoll and published by Springer. This book was released on 2016-04-04 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biotechnology has emerged as one of the key environmentally safe technologies for the future which enables use of biomass to develop novel smart materials and to replace oil derived products. Fungi are the most efficient producers of the enzymes needed for this purpose and in addition they produce a plethora of secondary metabolites, among which novel antibiotics can be found. Industrial application and exploitation of the metabolic capacities of fungi requires highly productive and robust gene expression systems, which can be achieved by selection of appropriate species and strain improvement. In this book we aim to summarize homologous and heterologous gene expression systems of fungi for production of enzymes and secondary metabolites. A broad overview on requirements, challenges and successful applications shall serve as a basis for further development of fungi as biotechnological workhorses in research and industry.

Download or read book Improving the Management of the Soybean Cyst Nematode Heterodera Glycines Ichinohe written by Leonardo José Frinhani Noia da Rocha and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant-parasitic nematodes represent a substantial constraint on global food security by reducing the yield potential of all major crops, including soybean (Glycine max L.). The soybean cyst nematode (SCN) (Heterodera glycines I.) is widely distributed across all soybean production areas of the US, and is the major yield-limiting factor, especially in the Midwestern US. Double cropping (DC) is defined as producing more than one crop on the same parcel of land in a single growing season. Compared to conventional single annual crops, DC provides many advantages, including improving soil health, enhanced nutrient provisioning to plants, improvement of soil physical properties, control of erosion, decrease in tillage requirements, and enhanced profitability. In some double-cropping systems, soybean is planted following winter wheat (Triticum aestivum L.), and several reports suggest the potential of wheat to suppress SCN populations. Field trials were conducted from 2017 to 2018 to investigate the effect of wheat on SCN populations in double-cropping soybean. Nine fields with three levels of initial SCN populations (low, moderate, and high) were selected in Illinois. Wheat was planted in strips alternating with strips-maintained weed-free and under fallow over winter and early spring. Soybean was planted in all strips after the wheat harvest. Soybean cyst nematode egg densities were acquired at four time points: wheat establishment, post-wheat/pre-soybean, mid-soybean (R1 growth stage or beginning of flowering), and post-soybean harvest. Wheat strips reduced SCN egg densities compared with fallow strips at the R1 stage (−31.8%) and after soybean harvest (−32.7%). Field locations with noted SCN suppression were selected for a metagenomics study. The structure of fungal communities differed significantly between DC and fallow plots at soybean planting and after harvest (P

Download or read book Biological Control of Plant Diseases written by E.C. Tjamos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers contained in this book were presented at a NATO Advanced Research Workshop (ARW) held at Cape Sounion, Athens, Greece, 19-24 May, 1991. The twenty-eight more comprehensive papers represent the key subjects of the ARW covered by invited speakers. The thirty-four short papers pre sented in a research format are contributions of those invited to participate in the ARW. There was a total of 70 participants from 21 countries. The objectives of the ARW were as follows: to review current knowledge of biological control of plant diseases and plant parasitic nematodes, with emphasis on mechanisms at the molecular, cellular, organismal, and ecosystem level; to examine and expand on current concepts and synthesize new concepts; to identify and prioritize limitations in the use of biological control for plant diseases and nematodes and the scientific research needed to overcome these limitations; and to develop strategies for biological control through management of resident agents or introduction of natural or modified agents.

Download or read book Fungal Antagonists of the Soybean Cyst Nematode Heterodera Glycines written by Senyu Chen and published by . This book was released on 1994 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Plant parasitic Nematodes written by and published by National Academies. This book was released on 1968 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Control Measures of Success written by G. Gurr and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: As well as examining successful biological control programmes this book analyses why the majority of attempts fail. Off-target and other negative effects of biological control are also dealt with. Chapters contributed by leading international researchers and practitioners in all areas of biological control afford the book a breadth of coverage and depth of analysis not possible with a single author volume. Combined with the use of other experts to review chapters and editorial oversight to ensure thematic integrity of the volume, this book provides the most authoritative analysis of biological control published. Key aspects addressed include how success may be measured, how successful biological control has been to date and how may it be made more successful in the future. With extensive use of contemporary examples, photographs, figures and tables this book will be invaluable to advanced undergraduate and postgraduate students as well as being a `must' for all involved in making biological control successful.

Download or read book Biocontrol Agents of Phytonematodes written by Tarique Hassan Askary and published by CABI. This book was released on 2015-06-29 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highlighting the use of biocontrol agents as an alternative to chemical pesticides in the management of plant parasitic nematodes, this book reviews the current progress and developments in the field. Tactful and successful exploitation of each biocontrol agent, i.e. nematophagous fungi, parasitic bacteria, predaceous mites, rhizobacteria, mycorrhiza and predaceous nematodes, has been described separately. The contributors are 23 eminent nematologists and their information has been compiled in 19 chapters.

Download or read book Integrated Management and Biocontrol of Vegetable and Grain Crops Nematodes written by A. Ciancio and published by Springer Science & Business Media. This book was released on 2007-12-08 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second volume of the IMPD series describes aspects related to the most important phytoparasitic nematodes, considering the integration of biological control methods with other management practices and technologies, including the use of predatory nematodes and microbial rhizosphere antagonists. A focus is given on regional issues. A review on nematode management in cotton is integrated by a chapter on management of nematodes on wheat. New technologies are also revised.