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
Recommended Citation
Carvajal, Raphael Gabriel F., "Partial biological characterization of Erwinia sp., the causal organism of bacterial crown rot of papaya (Carica papaya L.)" (2016). Undergraduate Theses. 5169.
https://www.ukdr.uplb.edu.ph/etd-undergrad/5169
Document Type
Thesis