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This study was conducted to determine the efficacy of two bacterial(Bacillus subtilisand Pseudomonas fluorescens) and one Fungus(Trichoderma harzianum) as bio -control agents and Topsin – M fungicidein controlling root- rot disease of petunia plants caused byRhizoctonia solani in thegreenhouse.Conditions . the results of a pots experiment showed that both fungal and bacterial bio- control agents and all bio-agents andTopsin – Mtreatments enhanced the percentage of seed germination which reached 100 %compared with control treated ) 0.0 % (. They also reduced the con contraction of R. solani in the plant roots increased some of growth parameters such as plant content of chlorophyll .

اخر تٔتتذ تٌتتري اللتاضتتت لت تٕتت مٕ كفتتت اثىتتت ن عتتته ا اُعتتتة المي ئستتت اتز ة تٕتت ال يت رٕ تٔتت Pseudomonas fluorescens َ Bacillus subtilis اَ عتة المي ئست الفيترْ harzianumTrichoderma اَلم تٕتل Topsen-Mئ الط يٕر ال عرع تعفه خر تَ و ت ال تٕ وُ تٕ المتطت ن اته الفيتر Rhizoctoniasolani ئت تترا اتطتضال لاضتتتي . أظ تٍتر وتتت ةح تدرلأتت اخطتتض يا تتة ا ل تٕتذ ا لسختت خ أن اضتتتخلا اتت عل ا لمي ئستتالإز ة تٕ

Bacillus subtilisand Pseudomonas fluorescens --- Bacillus subtilisand Pseudomonas fluorescens