Effect of chitosan on the in vitro growth and development of S. oryzae Sawada fungus and rice (Oryza sativa Lin) seed protection
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Abstract
polymer, has been proved as an alternative to control some
phytopathogen fungi. Therefore, the effect of Q-63 chitosan
(100, 500 and 1000 mg.L-1) was studied on the conidial
germination and mycelial growth of Sarocladium oryzae, causal
agent of sheath rot disease in rice, as well as its potentiality
for protecting rice seeds inoculated with the pathogen.
Germination percentage of the conidia treated with different
concentrations of Q-63 was evaluated after two, five, eight, 11
and 14 hours, colony diameter was measured after two, five,
eight, 11 and 13 days while fungal infection percentage in
seeds treated with Q-63 was determined after six, seven, eight
and nine days. Results showed the inhibitory effect of the
compound on spore germination, mycelial growth and its seed
protecting effect at the highest concentration.
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