Cover Image

Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)

Studies were conducted to characterize and evaluate selected fungicides against Phytophthora palmivora on cocoa (Theobroma cacao) from Sarawak, Malaysia. Based on morphological characteristics and molecular data (sequence analysis of internal transcribed spacer region and phylogenetic analysis), the...

Full description

Saved in:
Bibliographic Details
Main Authors: Ong, S.N., Leong, Sui Sien, Kwan, Yee Min
Format: Article
Language:English
Published: Malaysian Society of Plant Physiology 2019
Online Access:http://psasir.upm.edu.my/id/eprint/80902/1/FUNGI.pdf
http://psasir.upm.edu.my/id/eprint/80902/
https://www.cabdirect.org/cabdirect/abstract/20193452605
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.80902
record_format eprints
spelling my.upm.eprints.809022020-10-15T23:00:26Z http://psasir.upm.edu.my/id/eprint/80902/ Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao) Ong, S.N. Leong, Sui Sien Kwan, Yee Min Studies were conducted to characterize and evaluate selected fungicides against Phytophthora palmivora on cocoa (Theobroma cacao) from Sarawak, Malaysia. Based on morphological characteristics and molecular data (sequence analysis of internal transcribed spacer region and phylogenetic analysis), the causal pathogen was identified as P. palmivora. Fungicides, including copper oxychloride, metalaxyl, benzalkonium chloride, and a biofertilizer, Bacillus subtilis were evaluated for their ability to inhibit the mycelium growth of P. palmivora isolates. Benzalkonium chloride and metalaxyl exhibited 100% inhibitory effect against P. palmivorain vitro, at effective concentration (EC50) of 0.2% and 0.3 μg/mL, respectively. B. subtilis and copper oxychloride provided over 85% efficacy, with EC50 estimated at 0.35% and 1500 μg/mL, respectively. Therefore, benzalkonium chloride and B. subtilis are a good alternative for rotation with the commonly used active ingredients (metalaxyl and copper oxychloride) for P. palmivora control and management of resistance. The in vitro study has demonstrated good control of P. palmivora but in vivo study is required to account the environment factor and systemic response of the plant. Malaysian Society of Plant Physiology 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/80902/1/FUNGI.pdf Ong, S.N. and Leong, Sui Sien and Kwan, Yee Min (2019) Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao). Transactions of The Malaysian Society of Plant Physiology, 26. pp. 204-209. ISSN 2600-9595 https://www.cabdirect.org/cabdirect/abstract/20193452605
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Studies were conducted to characterize and evaluate selected fungicides against Phytophthora palmivora on cocoa (Theobroma cacao) from Sarawak, Malaysia. Based on morphological characteristics and molecular data (sequence analysis of internal transcribed spacer region and phylogenetic analysis), the causal pathogen was identified as P. palmivora. Fungicides, including copper oxychloride, metalaxyl, benzalkonium chloride, and a biofertilizer, Bacillus subtilis were evaluated for their ability to inhibit the mycelium growth of P. palmivora isolates. Benzalkonium chloride and metalaxyl exhibited 100% inhibitory effect against P. palmivorain vitro, at effective concentration (EC50) of 0.2% and 0.3 μg/mL, respectively. B. subtilis and copper oxychloride provided over 85% efficacy, with EC50 estimated at 0.35% and 1500 μg/mL, respectively. Therefore, benzalkonium chloride and B. subtilis are a good alternative for rotation with the commonly used active ingredients (metalaxyl and copper oxychloride) for P. palmivora control and management of resistance. The in vitro study has demonstrated good control of P. palmivora but in vivo study is required to account the environment factor and systemic response of the plant.
format Article
author Ong, S.N.
Leong, Sui Sien
Kwan, Yee Min
spellingShingle Ong, S.N.
Leong, Sui Sien
Kwan, Yee Min
Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)
author_facet Ong, S.N.
Leong, Sui Sien
Kwan, Yee Min
author_sort Ong, S.N.
title Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)
title_short Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)
title_full Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)
title_fullStr Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)
title_full_unstemmed Characterization and evaluation of fungicides for control of Phytophthora palmivora on cocoa (Theobroma cacao)
title_sort characterization and evaluation of fungicides for control of phytophthora palmivora on cocoa (theobroma cacao)
publisher Malaysian Society of Plant Physiology
publishDate 2019
url http://psasir.upm.edu.my/id/eprint/80902/1/FUNGI.pdf
http://psasir.upm.edu.my/id/eprint/80902/
https://www.cabdirect.org/cabdirect/abstract/20193452605
_version_ 1681490828938182656
score 13.211869

Similar Items