Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)

© 2020 Association of Agricultural Technology in Southeast Asia. All rights reserved. The Powdery mildew on rose caused by the fungus Podosphaera pannosa is a serious problem in comercial rose garden. All aerial parts of the plant can be infected with the production of white mycelium containing coni...

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Main Authors: N. Wanasiri, R. J. McGovern, R. Cheewangkoon, C. To-Anun
Format: Journal
Published: 2020
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/68187
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spelling th-cmuir.6653943832-681872020-04-02T15:23:10Z Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa) N. Wanasiri R. J. McGovern R. Cheewangkoon C. To-Anun Agricultural and Biological Sciences © 2020 Association of Agricultural Technology in Southeast Asia. All rights reserved. The Powdery mildew on rose caused by the fungus Podosphaera pannosa is a serious problem in comercial rose garden. All aerial parts of the plant can be infected with the production of white mycelium containing conidiospores. Conidiospores can be dispersed by wind or rain to healthy plants. Infection is promoted by high humidity or where poor air movement occur in dryer environments. In this experiment, we observed a rose powdery mildew that was found in rose cultivar “Queen Sirikit” using a light microscope. The morphological characteristics of the anamorph revealed mycelium with indistinct or nipple-shaped appressoria, conidia with fibrosin bodies that measured approximately 6 to 8 x 17 to18 μm and fuliginea-type germtubes. Conidiophores were straight, ca. 5 to 7 x 41 to 80 μm with cylindrical foot-cells. The efficacy of antifungal compounds salicylic acid (SA), fresh cow’s milk (10%/V.) and some biocontrol agents: the bacterium Bacillus subtilis (BS) and the hyperparasitic fungus Ampelomyces sp. were compared with the conventional fungicide carbendazim using an onion tissue bioassay. The results showed that SA inhibited conidia germination by 99.72% followed by BS (98.99%), Ampelomyces sp. (95.41%), carbendazim (83.24%) and the last was fresh cow’s milk by 80.81%. The control treatment had 100% spore germination. The potential of the antifungal compounds was assessed in a greenhouse experiment and SA was a superior treatment to reduce the severity of disease (57.78%). 2020-04-02T15:23:10Z 2020-04-02T15:23:10Z 2020-01-01 Journal 26300192 2-s2.0-85081272938 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85081272938&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/68187
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
N. Wanasiri
R. J. McGovern
R. Cheewangkoon
C. To-Anun
Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)
description © 2020 Association of Agricultural Technology in Southeast Asia. All rights reserved. The Powdery mildew on rose caused by the fungus Podosphaera pannosa is a serious problem in comercial rose garden. All aerial parts of the plant can be infected with the production of white mycelium containing conidiospores. Conidiospores can be dispersed by wind or rain to healthy plants. Infection is promoted by high humidity or where poor air movement occur in dryer environments. In this experiment, we observed a rose powdery mildew that was found in rose cultivar “Queen Sirikit” using a light microscope. The morphological characteristics of the anamorph revealed mycelium with indistinct or nipple-shaped appressoria, conidia with fibrosin bodies that measured approximately 6 to 8 x 17 to18 μm and fuliginea-type germtubes. Conidiophores were straight, ca. 5 to 7 x 41 to 80 μm with cylindrical foot-cells. The efficacy of antifungal compounds salicylic acid (SA), fresh cow’s milk (10%/V.) and some biocontrol agents: the bacterium Bacillus subtilis (BS) and the hyperparasitic fungus Ampelomyces sp. were compared with the conventional fungicide carbendazim using an onion tissue bioassay. The results showed that SA inhibited conidia germination by 99.72% followed by BS (98.99%), Ampelomyces sp. (95.41%), carbendazim (83.24%) and the last was fresh cow’s milk by 80.81%. The control treatment had 100% spore germination. The potential of the antifungal compounds was assessed in a greenhouse experiment and SA was a superior treatment to reduce the severity of disease (57.78%).
format Journal
author N. Wanasiri
R. J. McGovern
R. Cheewangkoon
C. To-Anun
author_facet N. Wanasiri
R. J. McGovern
R. Cheewangkoon
C. To-Anun
author_sort N. Wanasiri
title Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)
title_short Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)
title_full Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)
title_fullStr Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)
title_full_unstemmed Efficiency of antifungal compounds against powdery mildew disease of rose (Podosphaera pannosa)
title_sort efficiency of antifungal compounds against powdery mildew disease of rose (podosphaera pannosa)
publishDate 2020
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85081272938&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/68187
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