Avaliação do efeito curativo e preventivo do óleo essencial do capim citronela no controle de Pyricularia grisea
DOI:
https://doi.org/10.20873/jbb.uft.cemaf.v2n2.periniKeywords:
Cymbopogon nardus, medicinal plants, fungitoxicityAbstract
The rice blast is the most important disease of the rice, due to the damage that it causes in the productivity andgrain quality. Aiming at the use of essential oils and plant extracts to control this disease. The objective of this study was to evaluate the curative and preventive effect of the extracts and essential oil of citronella grass (Cymbopogon nardus L.) to control rice blast. The evaluation of the curative effect was performed seven days after the sprayingwith the extracts of citronella grass. As for the evaluation of preventive effect, the plants were sprayed with thetreatments and 24 hours after inoculated with 20 mL of the spore solution per tray. In the assessing of the curative effect, it was found that the application of fungicide and the diluted essential oil of citronella grass at a concentration of 2% plants showed no symptoms of blast in 50% of the repetitions. Regarding the evaluation of preventive effect, the plants showed no symptoms of the disease in concentrations of 1.5, 1.75 and 2% of the essential oil of citronella grass in 50% of the repetitions.
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