كفاءة البكتريا Bacillus subtilis و حامض السالسليك Salicylic Acid في تثبيط نمو و أمراضية الفطر Fusarium moniliforme Shelden المسبب لمرض تدهور و موت فسائل نخيل التمر

الملخص EN

The present study has been performed to survey number of date palm orchards at Al- Hartha and Shaat - Alarab areas :for the date palm offshoots decline disease as well as identify the potential pathogens ,The percentage of infection was found to be 17 and 34%at AL-Hartha and Shaat –AL-Arab respectively ,different fungal species have been isolated ,Most frequent fungi were as follow : Fusarium moniliforme ;Chalaropsis radicicola ;Thielaviopsis paradoxa and F.oxysporum respectively .Pathogenecity result analysis revealed the pathogenic ability of F.moniliforme which reported the values of 55 and 40% ,as infection percent for AL.hartha and shaat .ALarab isolate respectively .Antegonistic test showed the inhibition efficiency of bacterium Bacillus subtilis and salicylic acid (0.8mM) on PDA and reported 100 and 83.2% respectively .Green house experiment results elucidated the inhibition efficiency of both bacterial bioagent B.subtilis and SA in reducing the pathogensis affects of F.moniliforme on date palm , the infection percent was26.76% compared to pathogen treatment (untreated) which was 66.67% .All growth parameters were fresh and dry weight of date palm shoot and root system and total chlorophyll content at both B.subtilis and SA combination were significantly increased compared to control (untreated) treatment.