Main Page
Dean's Introduction
Org Structure
About RACI
Deans of the Institute
Our Partners
Our Mission and distinctiveness
Quality Policy
Members of the Advisory Committee
More about RACI's administration
the Institute's objectives
our capabilities
more of Capacity Institute
decisions & generalizations
List of Sc.
Int'l Scientific Chairs
Scientific Chairs
Quotes on KAU’s Scientific Chairs
history Scientific Chairs
Publications and Research Institute consultations
models and success stories
Sponsors’ Guide
Researchers’ Guide
Scientific publications
Sponsored chairs
Institute Activities
final championship Institute
accreditation EFQM
Ramadan breakfast
Our Services
Our Services And Capabilities
Scientific Research Chairs
Quotes on KAU’s Scientific Chairs
History Scientific Chairs
Publications and Research Institute consultations
Models And Success Stories
Sponsors’ Guide
Researchers’ Guide
Consulting
Quotes on RACI Consultation Services
Our Partners
Consultation Archive 1419
Consultation Archive 1420
Consultation Archive 1421
Consultation Archive 1422
Consultation Archive 1423
Consultation Archive 1424
Consultation Archive 1424
Consultation Archive 1425
Consultation Archive 1426
Consultation Archive 1427
Consultation Archive 1428
Consultation Archive 1429
Contract research and studies
Our Partners
research and studies Contractual - Medical
research and studies Contractual - Engineering
Economic Projects
Quotes on RACI research and studies Services
Supervision of the educational and academic
Educational Supervision
Our Partners
Curriculum Design
Academic Training
Curriculum Assessment
Scientific services
Exhibition Service's continued scientific
My Previous Scientific Services
Our capabilities
General Statistics
Academic Supervision
Classification of Scientific Chairs
Classification of institute activities
Institute Activities According The Sector
Classification of Contract Research
classification of dedicated consultations
Academic Supervision
Files
RACI Map
Research
PhotoAlbum
Contact Us
Favorite Links
Latest News
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Research And Consulting Institute
Document Details
Document Type
:
Article In Journal
Document Title
:
PATHOLOGICAL AND RHIZOSPHERICAL STUDIES ON ROOT-ROT DISEASE SQUASH IN SAUDIA ARABIA AND ITS CONTROL
دراسات ريزوسفيريكال و المرضيّة على مرض تعفّن الجذر إسكواش في سيطرته و سوديا أرابيا
Subject
:
PATHOLOGICAL AND RHIZOSPHERICAL STUDIES ON ROOT-ROT DISEASE SQUASH IN SAUDIA ARABIA AND ITS CONTROL
Document Language
:
English
Abstract
:
Isolations from diseased squash roots revealed the presence of Alternaria tenuis, Aspergillus niger, Fusarium oxysporum, F. solani and Rhizoctonia solani. The last two fungi were more frequent than any of the other fungi. Pathogenicity tests proved that squash plants were highly vulnerable to attack by Fusarium solani and Rhizoctonia solani in descending order, during the pre- and post-emergence stages. Isolates No.1 of F. solani and No.2 of R. solani were the most virulence pathogen and significantly retard the morphogenesis of survived squash plants. The in-vitro antagonistic effect of Trichoderma harzianum on root-rot pathogens revealed the presence of clear antagonistic action between them. The highest mean inhibition values were 78.86 and 41.94% RI against F. solani and R. solani, respectively. T. harzianum also exhibited a mycoparazitation associated with high level of growth reduction by its filtrate on the two pathogens. In vitro, benlate fungicide was found to be very toxic to the root-rot pathogens. Untreated squash seeds grown in the infested soil (positive control) with F. solani and R. solani showed higher percentage of infection. The plants grown under this treatment were significantly shorter with lesser weight than the corresponding figures of the other treatments. Soil or seed coated with T. harzianum and benlate had a significant lower percentage of infection (pre, post, dead plants and developed plants), significantly longer in height and better plant growth parameters. T. harzianum applied as soil or seed treatments enhancing the total microbial flora of squash rhizosphere at the first 30 days of plant growth and greatly increased the total fungal counts comparing with the corresponding figures of negative and positive controls. As the density of T. harzianum reached 99.3% and 100.0% in cultivated plants soil infested with F. solani and R. solani respectively, the other genera or species of fungi become greatly reduced or disappeared.
ISSN
:
1684-5315
Journal Name
:
African Journal of Biotechnology
Volume
:
6
Issue Number
:
3
Publishing Year
:
1427 AH
2007 AD
Article Type
:
Article
Added Date
:
Wednesday, February 23, 2011
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
لبني صالح نوار
Nwar, Lubna Saleh
Researcher
Doctorate
Files
File Name
Type
Description
29128.pdf
pdf
Back To Researches Page