Efficacy of osthol, a potent coumarin compound, in controlling powdery mildew caused by Sphaerotheca fuliginea
- 1 September 2009
- journal article
- research article
- Published by Informa UK Limited in Journal of Asian Natural Products Research
- Vol. 11 (9), 783-791
- https://doi.org/10.1080/10286020903158964
Abstract
The efficacy of osthol, a natural coumarin compound, in controlling powdery mildew was evaluated in 2004–2005 in Anhui and Hebei Provinces of China. In both years, the treatments (osthol 15.0 and 18.0 g ai ha− 1) showed a stable control efficiency of 75.42, 81.24% and 76.36, 84.84%, respectively, at the Institutes of Plant Protection of Hebei Academy of Agricultural Sciences. In field experiments, osthol was as effective as difenoconazole in controlling powdery mildew and was more effective than triadimefon against Sphaerotheca fuliginea. Protection was expressed as a significant reduction (up to 87% compared with the control) in the mildewed leaf area in young pumpkin plants. Osthol strongly inhibited spore germination and mycelial growth of S. fuliginea in vitro, damaged the cell wall and the organelles of the pathogen. At 48 h after incubation, 50 μg ml− 1 osthol could completely inhibit spore germination. These findings suggested that the effect of osthol on powdery mildew may be associated with the direct fungitoxic property against the pathogen. We conclude that osthol would be an attractive natural compound for practical agronomic use against powdery mildew.Keywords
This publication has 26 references indexed in Scilit:
- Occurrence of powdery mildew (Sphaerotheca pannosa) in Japanese plum in Northern Israel and its controlCrop Protection, 2005
- Evaluation of fungicides for prevention and management of powdery mildew on watermelonCrop Protection, 2004
- Effect of application method on the control of powdery mildew (Bulmeria graminis) on spring barleyCrop Protection, 2003
- The strobilurin fungicidesPest Management Science, 2002
- Fungicide Resistance in Cucurbit Powdery Mildew: Experiences and ChallengesPlant Disease, 2001
- Polar — a potent Polyoxin B compound for controlling powdery mildews in apple and nectarine trees, and grapevinesCrop Protection, 2000
- Kresoxim - methyl: Modification of a Naturally Occurring Compound to Produce a New FungicidePlant Disease, 1999
- Fungicide resistance in populations of cucurbit powdery mildew (Sphaerotheca fuliginea)New Zealand Journal of Crop and Horticultural Science, 1994
- Fungicide Resistance: Practical Experience with Antiresistance Strategies and the Role of Integrated UseAnnual Review of Phytopathology, 1991
- Fungicide resistance in cucurbit powdery mildew (Sphaerotheca fuliginea) and its effect on field controlAustralian Journal of Experimental Agriculture, 1988