Journal Algérien des Régions Arides
Volume 12, Numéro 2, Pages 117-125
2017-03-03
Biological Control Of Date Palm Diseases With Native Antagonistic Fungi Of Oued Righ Region (algerian Sahara)
Authors : Ouadah F .
Abstract
The date palm (Phoenix dactylifera L.) is one of the principal species in the south of Algeria. However, this speculation is confronted to some problems including plant health. Several fungal and bacterial antagonists were used to control plant diseases. The present study was undertaken to investigate the interaction of antagonistic fungi (Trichoderma harzianum, Pythium sp. and Aspergillus niger) and pathogenic fungi (Fusarium sp. and Alternaria sp.) of date palms. The confrontation test of two groups of microorganisms with the antagonists on nutrient agar revealed the inhibition of mycelia growth of the two fungi. The Fusarium sp. was inhibited with 68% by T. harzianum, 63% by Pythium sp. and 46% by A. Niger. As for the Alternaria sp., inhibition rates of 63% and 54% were exercised by T. harzianum and Pythium sp., respectively. Starting from the sixth day of the cultivation, the antagonistic fungi invaded the colonies of the pathogenic fungi and began to sporulate marking a very important myco-parasitic power.
Keywords
Date palm, biological control, Fusarium sp.,Alternaria sp.,antagonistic fungi, Algeria.
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