Simple preparation of the dried galangal (Alpinia galanga) in ethanol is effective to suppress Curvularia sp., which causes grain discoloration of rice (Oryza sativa Suphan Buri 2)
Galangal (Alpinia galanga) is a renowned medicinal plant that has been used for food and medicine.
This plant also receives attention for use in agriculture, particularly for controlling plant diseases.
The crude extract of galangal, using ethanol as solvent, is effective to suppress plant pathogenic fungi, such as Curvularia lunata and Fusarium sacchari, the causal agents of grain discoloration (GD) disease of rice (Oryza sativa). In a recent study in 2020, the simple preparation of dried galangal, extracted with 60% ethanol, was effective to suppress Curvularia sp., the fungus which caused large lesion (LL) symptom of GD. However, the preparation of dried galangal (only at 20% in water) suppressed the same pathogen which caused small spot (SS) symptom in rice (Suphan Buri 2) in Phetchaburi, Thailand.
The dried galangal, extracted with 60% ethanol, was as effective as the applications of the farmers concoction which was composed of the commercial chemical fungicide Armure® (mixture of propiconazole and difenoconazole), abamectin, liquid extract of pineapple peel, and the fresh cell suspension of Bacillus megaterium.
Win, K.S., Mongkol, R. and Kanjanamaneesathian, M. (2022). Simple preparation of the dried galangal (Alpinia galanga) in ethanol is effective to suppress Curvularia sp., which causes grain discoloration of rice (Oryza sativa Suphan Buri 2). Acta Hortic. 1339, 449-454
DOI: 10.17660/ActaHortic.2022.1339.57
https://doi.org/10.17660/ActaHortic.2022.1339.57
DOI: 10.17660/ActaHortic.2022.1339.57
https://doi.org/10.17660/ActaHortic.2022.1339.57
ethanol extract, galangal, grain discoloration of rice, Curvularia lunata
English
1339_57
449-454