VARIATION AMONG ISOLATES OF Botrytis spp. AND INTERACTION BETWEEN B. fabae ISOLATES AND SOME FABA BEAN VARIETIES

Isolates of botrytis spp. collected from faba bean growing governorates ofnorthern and middle egypt were compared for their morphological and physiologicalcharacters.botrytis spp. isolates showed differences in growth rate and spore productionas well as number and size of sclerotia while, growth of botrytis cinerea isolates wasfaster than those of botrytis fabae onto all tested media and most of the fabae typeisolates produced number of spores less than that produced the cinerea type. also, b.fabae isolates were the highest number of small sclerotia.eight faba bean varieties varied in their reaction to chocolate leaf sport diseasecaused by b. fabae sard. giza 402 is highly susceptible cv. (74.2%) while, giza-blanka was 402 the highly resistant (40.0%) whereas, giza-3 was moderatelyresistant.also, isolate obtained from nubaria was more virulent than those obtainedfrom other governorates.