Experiments were conducted with commercially grown cherry tomato fromYunnan, China. Fruits without injuries and diseases at pink stage of maturity were put into 1.5 L plastic boxes. After being immersed in a solution of 0.1% sodium hypochlorite for 2 min, the selected cherry tomatoes were rinsed with tap water and air-dried before wounding. Then, each fruit was wounded to form a hole (5 mm diameter and 2 mm deep) on their peel at the equatorial region by using a sterile borer. There were nine treatments here: 1) sterile distilled water (control); 2) sterile distilled water to which 1% acetic acid had been added; 3) sterile distilled water to which 0.1% (w/v) chitosan and 1% acetic acid had been added; 4)w6) sterile distilled water to which 100 ml/l, 300 ml/l and 500 ml/l methyl jasmonate, 0.1% (w/v) chitosan and 1% acetic acid had been added; 7)w9) sterile distilled water to which 100 ml/l, 300 ml/l and 500 ml/l methyl jasmonate had been added. After 20 ml of liquid of each treatment was pipetted into each wound of the treated tomato fruit, 10 ml of conidial suspension of A. alternata (5 104 spores/ml) was pipetted into each wound. Then the treated tomatoes were placed in plastic boxes sealed to maintain high humidity (approximately 95%) and incubated at 28 C. After an appropriate incubation time (8e10 h) at 28 C, at least 100 spores per replicate were observed microscopically to determine germination rate and germ tube length. Each treatment was replicated three times with 20 fruits per replicate and the entire experiment was repeated twice.