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Most rice protection methods have currently used toxic chemicals to control pathogens and pests, which leads to environment pollution. Systemic acquired resistance (SAR) taking advantage of natural defence reaction of plants could be proposed as an alternative, ecologically friendly ap-proach for plant protection. Its application into rice production could minimize the chemicals quantity used, and could contribute to the decrease of environmental pollution and the development of sustainable agriculture. The research was conducted to select the best effective chemical and method to improve the health of rice plants infected by grassy stunt disease in net-house of Cantho University. SAR chemicals were used at very low concentrations (in mM). Results showed that the height of rice plants treated with SAR chemicals was higher than that of plants untreated. Besides, the number of diseased plant was reduced and the ratio of firm grain and yield increased when plants were applied by SAR. Among them, oxalic acid was the best systemic acquired resistance. With oxalic acid, seed soaking was better than seed coating in systemic acquired resistance against rice grassy stunt disease.

Induced systemic resistance against rice grassy stunt virus – a promising field for ecological rice production