For the disease development assessment and the gene expression analysis, droplets of 5 mL of spore suspension(5 105 spores mL1) in 1/2 potato dextrose broth (PDB) (Difco,
Detroit, MI, USA) were deposited on the leaves of 5-week-old tomato plants. Inoculated plants were kept at 100% relative humidity for 3 days at 25 C under a 12-h photoperiod with a photon flux density of 30 mmol photonsm2 s1. Lesion diameterwasmeasured
three days after incubation. To determine whether EAWP reduces gray mold in tomato plants, 5-week-old tomato plants were treated with EAWP (66 ng H2O2 cm3 h1) for 7 days and were subsequently
challenged with B. cinerea. The diameter of the developing
fungal lesion was measured 3 days post-inoculation.