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Original Article

J App Pharm Sci. 2018; 8(4): 161-167


Pathogenicity and biological control of Bayoud disease by Trichoderma longibrachiatum and Artemisia herba-alba essential oil

Sidaoui Abouamama, Karkachi Noureddine, Bertella Anis, El Goumi Younes, Haouhach Sadika, Oguiba Bouchra, Boudeffeur Said, Chhiba Mostafa, Kihal Mebrouk.

Abstract
All the Fusarium oxysporum f. sp. albedinis (Foa) isolated from rachis were pathogenic to the date palm seedlings cultivar Deglet Nour, while Fusarium sp. isolated from soil (E1, E2 and E3) did not show any aggressiveness against these seedlings. In vitro antagonistic effect of Trichoderma longibrachiatum against three isolates of Foa tested by direct confrontation or remote confrontation on Potato Sucrose Agar (PSA) medium, revealed that the latest has inhibited mycelial growth of the pathogen by more than 60%, compared to the control and this after an incubation period of six days at 272C. Mycelial growth of T. longibrachiatum occupied the whole Petri dish after three days of incubation while the three isolates of Foa (T15D, M15A1 and O15T) occupied only 17%, 11% and 20%, of the surface respectively. Biological control with essential oil of Artemisia herba-alba yielded important results with a minimum inhibitory concentration (MIC) ranging from 2.5 to 5μl/ml and a minimum fungicidal concentration (MFC) of 80μl/ml.

Key words: Artemisia herba-alba, Essential oil, Fusarium oxysporum f.sp. albedinis, Pathogenicity, Trichoderma longibrachiatum.



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