MELOIDOGYNE INCOGNITA GA QARSHI XITOZAN ASOSLI PREPARATLARINING NEMATITSID TA’SIRINI IN VITRO SHAROITIDA O‘RGANISH

In this study, chitosan derived from Bombyx mori was evaluated as a potential biopolymeric nematicide. A series of 0.5% chitosan solutions with varying molecular weights (104–309 kDa) and degrees of deacetylation (75–91%) were investigated for their effects on second-stage juveniles (J2) and egg hatching of Meloidogyne incognita. The results demonstrated that the nematicidal activity of chitosan strongly depends on its physicochemical properties. Specifically, low molecular weight chitosan (110 kDa) with a high degree of deacetylation (≥85%) exhibited the highest efficacy, reducing larval viability by up to 74.5% and completely inhibiting egg hatching. These findings confirm that chitosan has significant potential as an environmentally safe and sustainable alternative for nematode management.

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