Partial biological characterization of Erwinia sp., the causal organism of bacterial crown rot of papaya (Carica papaya L.)

Date

6-2016

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 Institute of Plant Breeding, University of the Philippines Los Baños, College, Laguna. The internship involved laboratory and greenhouse experiments that included bacterial culture preservation and maintenance, pathogenicity, seed transmission, alternate host and soil survival ability tests of Erwinia sp., the causal organism of bacterial crown rot of papaya. EP 27, an Erwinia sp. isolate from Laguna, was tested for pathogenicity on 3 to 4-month old ?Solo? papaya seedlings, and its ability to survive on ?Solo? papaya seeds and infect melon, cowpea, Euphorbia hirta, Euphorbia heterophylla, Amaranthus spinosus, and Amaranthus viridis seedlings. EP 27 was pathogenic on papaya seedlings but it did not infect the selected alternate hosts. No pure culture of EP 27 was isolated from the inoculated seeds. In the test for soil survival ability, unidentified bacteria were isolated from the soil planted with papaya seedlings infected with bacterial crown rot.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993 2016 A3 /C37

Document Type

Thesis

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