Biological control potential of Vesicular-Arbuscular Mycorrhizal Root Inoculant (VAMRI) and associated growth enhancers against soil-borne pathogens in onion (Allium cepa L.)

Date

7-2016

Degree

Bachelor of Science in Agriculture

Major Course

Major in Plant Pathology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Ireneo B. Pangga

Abstract

The research internship was conducted at the National Institute of Molecular Biology and Biotechnology (BIOTECH), Los Baños, Laguna, Philippines. It involved laboratory and greenhouse work that included vesicular-arbuscular mycorrhizal root inoculant (VAMRI) application and inoculation of growth enhancer isolates consisting of phosphate-solubilizing fungi (PSF), phosphate-solubilizing bacteria (PSB), and nitrogen-fixing bacteria (NFB), and soil-borne pathogens. The biological control potential of VAMRI and the growth enhancer isolates PSF T2M6, PSB 52, and NFB T1B4 against the soil-borne pathogens Sclerotium sp., Fusarium sp., and Rhizoctonia sp. in onion was determined. VAMRI reduced the disease incidence and severity caused by Sclerotium sp., Fusarium sp., and Rhizoctonia sp. Among the growth enhancers, the isolate NFB T1B4 was the most efficient in increasing the height and dry weight in onion plants. Disease incidence and severity caused by Fusarium sp. and Rhizoctonia sp. were reduced by the three growth enhancers but not Sclerotium sp. All VAMRI-inoculated treatments showed a positive vesicular-arbuscular mycorrhizal infection.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993 2016 A3 /M65

Document Type

Thesis

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