(العربية) تأثير الشيتوزان الزراعي على مكافحة أمراض البطاطس التي يسببها فطر الفيوزاريوم.

Antifungal Activity of Chitosan Against Fusarium Based on Laboratory and Field Tests

• In the laboratory experiment, chitosan significantly reduced the mycelial growth of Fusarium oxysporum, Fusarium sambucinum, and Fusarium graminearum by 88.4%, 89.0%, and 89.8%, respectively.

• In the field experiment, treating potato plants with chitosan two weeks after planting the tubers, followed by inoculation with Fusarium a week later, reduced the severity of dry rot caused by Fusarium oxysporum and Fusarium sambucinum by 60.0% and 48.2%, respectively.

• When tested as a plant treatment, potato plants treated with chitosan and inoculated with Fusarium showed a 33.5%–45.3% reduction in wilting severity compared to plants inoculated with Fusarium but not treated with chitosan.

• Chitosan treatment enhanced the activity of phenolic compounds and defense-related enzymes such as peroxidase and polyphenol oxidase in potato tubers inoculated with Fusarium species.

• The results clearly indicate that chitosan can be used as an alternative to chemical fungicides for controlling dry rot and Fusarium wilt by stimulating the plant defense system.

Source:
Mejdoub‐Trabelsi B, Touihri S, Ammar N, Riahi A, Daami‐Remadi M. (2019).
“Effect of chitosan for the control of potato diseases caused by Fusarium species.”
J Phytopathol.;00:1–10.