الفهرس 
IntrductionOnly 14 pages are availabe for public view
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Abstract
Soil-borne fungi of strawberry are distributed and infected the plants under different soils moisture, structure and environment. High incidence of root and crown rots of strawberries (Colletotrichum acutatum and Macrophomina phaseolina) has been observed in major strawberry production districts in Ismailia governorate. Survey carried out in commercial fields at three different locations in Ismailia were collected for isolation of associated fungi. Colletotrichum acutatum and M . phaseolina were found as virulent pathogens and caused pathogenic effect to the 6 tested strawberry cultivars in vivo. Colletotrichum acutatum was less virulent than M.phaseolina either in disease incidence (DI%) and disease severity (DS%). Results indicated positive effect on growth inhibition of strawberry crown and root rot pathogens (M.phaseolina and C. acutatum ) by the bioagents Trichoderma harzianum (isolate 1,2 ), T. viride, Bacillus subtilis and Streptomyces canescens isolates on the growth of the two pathogens. Soil solarization treatments showed best results when applied in soil cultivated with Festival and N-70cvs. under field conditions during the two seasons. Soil solarization and fumigation with Methyl bromide (MB) led to the best results for soil disinfection in both Festival and N70 cvs. during 2015 and 2016 seasons. Survival of both C. acutatum and M. phaseolina inocula buried in depths of 5 to 15 cm in field soil were recovered and keep its viability till 120 days then started to decrease to 60 and 80% after 180 days for the two pathogens under study, respectively