EFECTO PROTECTOR DE LA QUITOSANA EN SEMILLAS DE ARROZ FRENTE A Fusarium sp.

The effect of Q-63 chitosan active ingredient (100, 500 and 1000 mg/L) on the germination of Fusarium sp conidia, as well as its potentiality for protecting rice seeds inoculated with the pathogen was studied. The germination percentage of conidia treated with different concentrations of Q-63 was evaluated after 2, 5, 8, 11 and 14 hours, while the fungal infection percentage in seeds treated with Q-63 was determined after 6, 7, 8 and 9 days. The results showed that both 500 and 1000 mg/L concentrations inhibited conidia germination completely until 14 hours. However, the best protective effect on seeds (93.3 %) was obtained with the higher concentration at 9 days. [ABSTRACT FROM AUTHOR]