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Abstract
Two field trails with 15 years old grapevines cv. Thompson Seedless were conducted during 2003 and 2004 at Nobariya from Behera governorate to study the effect of the integrated disease management including canopy management, chemical control and biological control(during 2004 and 2005) to controlled the bunch rot disease.
The results showed that the disease incidence and severity were reduced by application of the canopy management treatment compared with non managed control. Also, data showed that the disease incidence and severity were reduced when the vines were treated with three sprays of fungicide (Euparen M) at bloom, pre-close and veraison stages.
Also, some factors which effect the disease were studied i.e. maturity stages, effect of temperature on rot development different levels of nitrogen fertilizer (tested on cv. Red Globe of grapevine 10 years old at Meniya governorate during 2003 to 2004) gibbrellen applications (tested on Thompson Seedless cv. During 2004 to 2005),reaction of different grapevine cultivars to fungi causing bunch rot
disease (tested on Thompson Seedless, Red Globe, Superior, Erly-Superior, Ruby Seedless and Flame Seedless). Fungi associated with the disease were isolated Botrydiplodia theobromae, Alternaria alternata, Aspergillus flavus, Cladosporium herbarum, Penicillium italicum, Rhizopus spp. and Botrytis cinerea. Also, some physiological studies on the fungi causing bunch rot disease, including the effect of pH and temperature on the causal fungi were carried out.