Survey of cucumber target spot, in vitro sporulation and aggressiveness of Corynespora cassiicola

The objective was to carry out a survey of the occurrence target spot (Corynespora cassiicola) in cucumber crops São Paulo State; evaluate culture media for sporulation pathogen and aggressiveness isolates plants. found nine municipalities, being main disease seven ten municipalities sampled, with leaf incidence above 50%, showing that is widely distributed State. Other diseases less frequently were scabies (Cladosporium cucumerinum), alternaria (Alternaria cucumerina), cercospora (Cercospora citrullina) downy mildew (Pseudoperonospora cubensis), predominant samples from one or two but also most municipalities. zoned (Leandria momordicae) have low incidence, three an lower than 20%. Greater occurred tomato juice oat flour media, without scraping surface colony maintained 16 days at 25ºC, under continuous fluorescent light. germination C. cassiicola used test between 82.8 95.5%, 50 separated into groups. four groups within range 3.1 22.3% severity, after inoculation pathogen, genetic variability species, which should be considered management studies, such as improvement.