On the other hand, in the case of tomato plants, disease severity was determined every 2 days, beginning when foliar necrotic symptoms first appeared on tomato plants, based on a symptom severity scale where: 1 = asymptomatic plants; 2 = weakly infected plants (50% of spotted
leaves but plants not dead) and 4 = dead plants. 15 days postinoculation, stem portions near damaged leaves from tested tomato plants were surface-disinfected and plated on Yeast Dextrose Carbonate Agar (YDC: yeast extract, 10 g; glucose, 20 g; CaCO3, 20 g; agar, 15 g; distilled water, 1000 mL) to confirm the presence of Xc