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Isolation, identification and control of stem-end rot of soursop / Aldrin H. Cenizal.

By:

Cenizal, Aldrin H [author]

Material type: Text

TextLanguage: English Publication details: Indang, Cavite, 2000. Cavite State University- Main Campus,Description: 52p. : ill. ; 28 cm. illustrations ; cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

634.41 C33 2000

Online resources:

View Abstract

Abstract: CENIZAL, ALDRIN HERNANDEZ. Cavite State University, Indang, Cavite. March 2000. "Isolation, Identification and Control of Stem-end Rot of Soursop". Adviser: Dr. Adelaida E. Sangalang. This study was conducted to isolate, identify, and control the causal organism of stem-end rot of soursop. The pathogen was isolated from infected fruits and stems. The isolated organism was inoculated to healthy soursop fruits to determine its pathogenicity. Reisolation was done after the disease symptom appeared. The causal organism of stem-end rot of soursop was identified as fungus Botryodiplodia theobromae Pap. The disease may attack at any development stage of the fruit. Rotting begins at the stem-end and soon spreads to the whole fruit causing complete discoloration. Six potential antagonists namely: Trichoderma sp.1, Trichoderma sp.2. Acrasis sp.1, Acrasis sp.2, Bacillus cereus and B. megaterium were screened. Among the six screened biological control agents, only Trichoderma sp.2 isolated from healthy soursop fruit inhibited the normal growth and development of the pathogen. In-vitro and in-vivo tests for antagonism of Trichoderma sp.2 was conducted. The antagonist destroyed the established colony of the pathogen in both experiments.

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Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	634.41 C33 2000 (Browse shelf(Opens below))		Link to resource	Room use only	T-2033		00002659

Thesis (BSA - - Crop Protection) Cavite State University.

Includes bibliographical references.

CENIZAL, ALDRIN HERNANDEZ. Cavite State University, Indang, Cavite. March 2000. "Isolation, Identification and Control of Stem-end Rot of Soursop". Adviser: Dr. Adelaida E. Sangalang.
This study was conducted to isolate, identify, and control the causal organism of stem-end rot of soursop. The pathogen was isolated from infected fruits and stems. The isolated organism was inoculated to healthy soursop fruits to determine its pathogenicity. Reisolation was done after the disease symptom appeared. The causal organism of stem-end rot of soursop was identified as fungus Botryodiplodia theobromae Pap. The disease may attack at any development stage of the fruit. Rotting begins at the stem-end and soon spreads to the whole fruit causing complete discoloration. Six potential antagonists namely: Trichoderma sp.1, Trichoderma sp.2. Acrasis sp.1, Acrasis sp.2, Bacillus cereus and B. megaterium were screened. Among the six screened biological control agents, only Trichoderma sp.2 isolated from healthy soursop fruit inhibited the normal growth and development of the pathogen. In-vitro and in-vivo tests for antagonism of Trichoderma sp.2 was conducted. The antagonist destroyed the established colony of the pathogen in both experiments.

Submitted to the University Library 03/28/2000 T-2033