Study of leaves spot on Date Palm plantlets Phoenix dactylifera L.

Abstract

This study was conducted of Date Palm Research Centar ,Basrah University year (2009 – 2010 ) , todetermined leaf spot cause observed on leaves plantlets of date palm (tissue culture ) of Barhee cultivar .The fungus Alternaria alternata was isolated from leaves plantlets with black spot symptoms , Pathogenicity test showed to ability fungus A.alternata to gave spot sympyoms on treat leaves plantlets .Showed the fungus Trichoderma harzianum ability in the inhibition of fungal growth A.alternata.