Effect of different chitin derivatives on in vitro growth of Rhizoctonia solani Kuhn fungus
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Abstract
vitro effect of different chitin derivatives (QC, HMK-70, Q-63,
HQ-63, D-glucosamine and N-acetil-glucosamine) was studied
on the growth of fungus Rhizoctonia solani Kuhn. Colony
diameter was evaluated after two, four and six days, and the
inhibition percentage of fungal micelial growth was determined.
Results showed a marked inhibitory effect of the strain
evaluated in presence of the chitosan HMK-70, Q-63 and its
corresponding enzymatic hydrolysate HQ-63; this effect
increased with product concentration , standing out both last,
with an inhibition of 100 % at the concentration of 1mg.mL-1.
On the other hand, D-glucosamine and N-Acetil-Glucosamine
did not show micelial growth inhibition, while the colloidal
chitin (QC) showed a slight inhibitory effect on the fungus
studied.
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