A study to identify the source of fungi contamination the date palm Phoenix dactylifera L . In vitro.

Abstract

This study was conducted in the labs. of Date palm research center- Basrah University, from ( 1. 3 . 2009 – 1 . 10 . 2009 ) Isolation of five species of fungi from the shoot tip of three cultivars of date palm ( Braim, Hillawi and Sayer) were carried out , wich are Aspergillus niger, Fusarium sp. Penicillium sp ., Alternaria alternata ., and Rhizopus sp. , Also Isolation and of seven species of fungi that contaminate the callus tissue cultures of three cultivars of date palm ( Braim, Hillawi and Sayer) were carried out, wich are A. alternata, Penicillium sp., A. niger , A.clavatus, Ulocclodium atrum , Rhizopus sp. and Stemphylium sp., Also the study showes that the fungi A. niger و Rhizopus sp و A. alternata و and Penicillium sp . are the same before and after invitro culture .Evalution of three fungicide agenst the fungi isolated from the shoot tip revealed that Mancozab the most effective fungicide that give inhibited percentage 92.7 % compare white the other fungicide Switch and Ridomal gold M 272 , witch give inhibited percentage % 82 and % 54.6 .