Last edited by Zolozshura
Wednesday, August 12, 2020 | History

2 edition of Pink root of onion caused by Pyrenochaeta terrestris found in the catalog.

Pink root of onion caused by Pyrenochaeta terrestris

Wilford M. Hess

Pink root of onion caused by Pyrenochaeta terrestris

by Wilford M. Hess

  • 223 Want to read
  • 11 Currently reading

Published .
Written in English

    Subjects:
  • Pink-root disease.,
  • Onions -- Diseases and pests.,
  • Pyrenochaeta terrestris.

  • Edition Notes

    Statementby Wildord Moser Hess.
    The Physical Object
    Pagination72 leaves, bound :
    Number of Pages72
    ID Numbers
    Open LibraryOL14329918M

    D. Pink Root» aused by the fungus Pyrenochaeta terrestris.» It affects onion roots and does not affect bulbs; however, it re-duces bulb size from infected plants.» Affected roots turn pink, shrivel and die.» During severe infections, onion tops turn white, yellow or brown and finally dies. 21 FARMERS HANDOOK FOR ONION PRODU TION 8. Hess, W. M., and Weber, D. J. Assays for determining resistance and susceptibility of onion cultivars to the pink root disease. Phytopathology Biological assays using the pathogen Pyrenochaeta terrestris, crude seedlings within 5 to 7 days. The disadvantage of .

    Pink root disease of onion (Allium cepa L.) is incited by a fungus now endemic in many onion growing regions of the United States (25,52). The causal organism, Pyrenochaeta terrestris (Hansen) Gorenz, Larson and Walker, belongs to the Imperfect group of fungi, order Sphaeropsidales, family Sphaeroidaceae, and is world wide in distribution (15). The. The first identification of P. terrestris in Serbia was in root of three types of Allium species (onion, garlic and leek) (Aleksić et al., ), and then in root of maize and other hosts (Petrović and Lević, ). Recent studies indicate that this fungus is common in root of maize in Serbia (Lević et al.

    Abstract Onion (Allium cepa L.) is threatened with infection caused by different pathogenic microorganisms. Soil born fungi that infect roots and bulbs of this crop are one of the most important pathogens in Iran which cause severe damage annually. Pink root and Fusarium basal rot are important diseases of cultivated alliums. Disease symptoms: Pink Root is caused by the soil-borne fungal pathogen, Phoma terrestris (syn. Pyrenochaeta terrestris), and is a serious problem for multiple onion growers. This disease can cause significant reductions in crop yields and quality in many onion.


Share this book
You might also like
Fungi and how to know them

Fungi and how to know them

Jack Roostand

Jack Roostand

Weekenders guide; places of historic, scenic, and recreational interest within 200 miles of the Washington-Baltimore area.

Weekenders guide; places of historic, scenic, and recreational interest within 200 miles of the Washington-Baltimore area.

Federal STEM education programs

Federal STEM education programs

Papua New Guinea national assessment report BPOA + 10, Mauritius 2005

Papua New Guinea national assessment report BPOA + 10, Mauritius 2005

Self-service fare collection

Self-service fare collection

The business bible

The business bible

Courses of Study in the Theatre Arts (Grade 7-12).

Courses of Study in the Theatre Arts (Grade 7-12).

Nationalist without a cause

Nationalist without a cause

Old Testament Survey, Job-Malachi PT. 2

Old Testament Survey, Job-Malachi PT. 2

In high regard

In high regard

Technical digest, Symposium on Optical Fiber Measurements, 1992

Technical digest, Symposium on Optical Fiber Measurements, 1992

Quizzer in Muslim personal law

Quizzer in Muslim personal law

Pink root of onion caused by Pyrenochaeta terrestris by Wilford M. Hess Download PDF EPUB FB2

Pyrenochaeta terrestris is a fungal plant pathogen infecting maize, sweet potatoes and strawberries. This plant pathogen causes a disease in onion (Allium cepa) that is commonly called Pink fungus produces dark brown to black pycnidia that have setae with one to Family: Incertae sedis.

In order to examine the effect of flooding on incidence of pink root disease caused by Pyrenochaeta terrestris and on onion growth and on populations of soil fungi, field experiments were.

An assay for resistance of onion to pink root Pyrenochaeta terrestris was developed, employing infested vermiculite medium with an adequate inoculum concentration of.

Disease symptoms: Pink Root is caused by the soil-borne fungal pathogen, Phoma terrestris Pink root of onion caused by Pyrenochaeta terrestris book. Pyrenochaeta terrestris), and is a serious problem for multiple onion disease can cause significant reductions in crop yields and quality in many onion.

Abstract: This survey was conducted in Gezira State to detect the pink root rot disease of onion, caused by Pyrenochaeta terrestris in Gezira State. The study evolved the isolation, identification of the causal agent of determination of the level of the disease incidence.

Pyrenochaeta terrestris) Although pink root disease, caused by the fungus. Pyre-nochaeta terrestris, has traditionally been considered a severe onion disease in southern New Mexico, the use of new resistant varieties has decreased its importance.

Pink root rot is one of the few onion fungal diseases that infect only the roots and do not invade. Pink root is primarily a problem on onion. It can infect garlic, but rarely causes economically significant damage. The fungus is a common soil inhabitant that penetrates onion roots directly.

It can persist in soil indefinitely and may spread via water or dirty equipment. Optimal temperatures for. Pink root [PR, caused by Phoma terrestris (Pt), synonym Pyrenochaeta terrestris] is a major soil-borne disease of onion (Entwistle, ).The disease was first reported in Texas (Tabenhaus, ) and has since been identified in onion growing regions worldwide (Chaves and Erickson, ; Klingner and Pontis-Videla, ; Pfleger and Vaughan, ).

What is Pink Root. Pink root is a disease that primarily attacks onions, though many other plants, including cereal grains, can be carriers. The fungal pathogen, Phoma terrestris, is able to survive many years in the soil without a host crop, but reactivates and moves swiftly into weakened or stressed onions when it detects them.

The plant then. Pyrenochaeta terrestris (H.N. Hansen) Gorenz, J.C. Walker & Larson, Phytopathology () [MB#]. Although pink root disease, caused by the fungus Pyrenochaeta terrestris, has traditionally been considered a severe onion disease in southern New Mexico, the use of new resistant varieties has decreased its importance.

Pink root rot is one of the few onion fungal diseases that infect only the roots and do not invade the bulb tissue. A pathogen Phoma terrestris, reported to cause pink rot disease in onion (Allium cepa L.) has been reported for the first time from India. First report of Phoma terrestris causing pink root rot of onion in India.

Pyrenochaeta terrestris pyrenochaeta terrestris Subject Category: Organism Names. ONION PINK ROOT Pink root of onion is caused by the fungus Phoma (Pyrenochaeta) terrestris. The fungus is a common inhabitant of soils throughout the United States. In Illinois, the disease is of particular importance in the onion-growing areas around Chicago.

Yields may be. Forty-five onion (Allium cepa) cultivars were evaluated for disease resistance to the fungal pathogen Pyrenochaeta terrestris (pink root disease). Forty-three Iranian cultivars and two commercially exotic resistant cultivars (Texas Early Grano and Yellow Sweet Spanish) were grown in a glasshouse for two successive years ( and ) in Isfahan, Iran.

An assay for resistance of onion to pink root Pyrenochaeta terrestris was developed, employing infested vermiculite medium with an adequate inoculum concentration of the fungus to minimize escapes of susceptible plants.

Plant material other than seed was used. Either root-excised 6–8 week-old seedlings or onion sets were planted in infested vermiculite, and kept for two successive 2-week.

Cultivated gentian (Gentiana scabra var. buergeri) has been seriously damaged by pink root rot since the s. Diseased plants finally collapse after wilting and stunting, More than 40 fungal genera were found to be associated with roots of mature and immature diseased plants or seeds.

pink root - WordReference English dictionary, questions, discussion and forums. All Free. | Plant Diseases a disease of onions and other plants, characterized by pink, withered roots, caused by a fungus, Pyrenochaeta terrestris.

The structure of pyrenocine C, a new metabolite isolated from onion pink root fungus, Pyrenochaeta terrestris (Hansen) has been elucidated as (±)-(2′E)(1′-hydroxybut-2′-enyl)methoxymethylpyrone by spectroscopic methods and chemical correlation with pyrenocine A. Pink root is a disease that primarily attacks onions, though many other plants, including cereal grains, can be carriers.

The fungal pathogen, Phoma terrestris, is able to survive many years in the soil without a host crop, but reactivates and moves swiftly into weakened or stressed onions when it detects plant then becomes unthrifty and will grow much more slowly than other non.

Pyrenochaeta terrestris [H. Hansen] Gorenz, J. Walker, & Larson) disease: Pink rot root, root pink bow; Spanish: Raíz rosada, Mancha rosada Symptoms.

The most notable symptom Pink rot the roots, as the name implies, is a pink roots. Infected roots are initially light – pink, then darken and become red and violet, shrivel, turn black. At Frankston in southern Victoria indazomet applied at kg/ha either alone or in combination with solarization, reduced disease incidence and severity of pink root, increased yields by at least % and improved storage quality of onions.

Solarization for 6 weeks delayed the development of pink root, but had no effect on either the disease incidence or severity at harvest.Introduction: Pink root of onion (Allium cepa) and red root rot of corn (Zea mays) are caused by the soilborne pathogen Phoma ically the greatest economical impact has been with pink rot of onion worldwide, but since the mid ’s there has been an increase in prevalence of the red root rot disease in the Delmarva (Deleware, Maryland and Virginia peninsula) corn producing.Use of different methods for the control of pink root rot disease (Pyrenochaeta terrestris) 'Hansen' of onion (Allium cepa L.) in Nyala province [] Adam, A.I.,University of Khartoum, Shambat (Sudan).

Faculty of Agriculture University of Khartoum, Shambat (Sudan). Faculty of Agriculture [Corporate Author].