Sensitivity to fungicides and mating types of Phytophthora infestans populations collected in North-Eastern and Central Italy

Seventy four Phytophthora infestans populations from tomato and potato crops were analyzed in vitro for their sensitivity to fungicides and mating type; populations were collected from 2002 to 2006 in the Emilia Romagna, Lombardy, Marche and Abruzzo regions. Fifty six % of populations showed A1 mating type, 42% were A2 while 2% were found to be self fertile; no strains showed resistance to metalaxyl, cymoxanil, dimethomorph, azoxystrobin, zoxamide and iprovalicarb