Author: J. M. FernandesPublisher:
ISBN:
Category :
Languages : pt-BR
Pages :
Book Description
studies on Septoria nodorum Berk., a pathogen of wheat in eastern Washington
Author: J. M. FernandesEpidemiological and Biological Aspects of Septoria Nodorum Berk., a Pathogen of Wheat in Eastern Washington
Author: Jose Mauricio FernandesPublisher:
ISBN:
Category : Seed pathology
Languages : en
Pages : 254
Book Description
Glume blotch of wheat, a disease incited by Septoria nodorum (=Leptosphaeria nodorum), was monitored through a succession of surveys during the period 1982-84 in eastern Washington . Findings revealed that infection in wheat occurs soon after seeddling emergence . Infection levels, varying upward of 70% in one of the two years, remained consistently high from November to March, declined somewehat in April-May and dropped dramatically in late May and June . It is speculated that such a decline is attributable to progressively fewer number of rainy days, lower relative humidities, shorter dew periods and elevating temperatures as the spring seasion advances . The viability of conidia of Septoria nodorum exposed on plastic strip underwent a corresponding decline with the advent of warmer, drier weather. The source of inoculum associated with the onset of the disease was linked to the presence of spore bearing pycnidia on debris of the previous wheat crop . The perfect stage of the fungus was never found on wheat or graminicolous hosts around and within wheat fields. Glume blotch effects on kernel weight of wheat was highly correlated with nodal infection . Substantial yield reduction ocurred when disease was imposed at the flowerig stage .According to criteria established by studying the relationship of organ infection and reduction in kernel weight it seemed unlikely that glume blotch is a disease of economic threat to the wheat industry in the Palouse. A new technique, involving the injection of inoculum into culms, was developed for evaluating cultivar reaction to glume blotch. A study of the survival of the fungus in hosts other than wheat indicated that downy chess (Bromus tectorum) may seerve as an effective alternative host. This host may play a role in the epidemiology of the disease in eastern Washington as well. Notwithstanding the results reported elsewhere, virulence of locally collected wheat isolates of Septoria nodorum, was not altered by ten consecutive passages through barley.
Studies on Septoria Nodurum Berk., a Pathogen of Wheat in Eastern Washington
Author: Jose Mauricio FernandesPublisher:
ISBN:
Category : Pathogenic fungi
Languages : en
Pages : 156
Book Description
Septoria of Cereals
Author: Studies on the Mechanisms of Resistance of Wheat to Septoria Nodorum Berk..
Author: The Septoria Diseases of Wheat
Author: Z. EyalPublisher: Cimmyt
ISBN:
Category : Septoria
Languages : en
Pages : 58
Book Description
Masters Theses in the Pure and Applied Sciences
Author: Wade H. ShaferPublisher: Springer Science & Business Media
ISBN: 1468451979
Category : Science
Languages : en
Pages : 407
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 29 (thesis year 1984) a total of 12,637 theses titles from 23 Canadian and 202 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 29 reports theses submitted in 1984, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Studies on the Inheritance of Resistance of Varieties of Wheat to Septoria Nodorum Berk
Author: G. C. LuzzardiEcological studies of Septoria nodorum Berk. (Leptosphaerio nodorum Muller) on symtomless winter wheat. 3v
Author: Patrick O'ReillyPublisher:
ISBN:
Category : Biology Theses
Languages : en
Pages :
Book Description
Author: Raziur Rahman