Treatment/Pathogen Disease severity
Salicylic acid 2.2 b 1 c 2 b
Chitosan 1 c 1.8 b 2.2 b
Inoculated control 3.8 a 4.6 a 4 a
Uninoculated control 0 d 0 d 0 c
* For each pathogentested, values (means) followed by the same letter are not significantly different according to Duncan's Multiple Range test at P ≤ 0.05.
Table 4: Effect of chitosan- and salicylic acid-based treatments on disease severity noted on tomato cv. Rio Grande plants inoculated with Verticillium dahliae (VD), Fusarium oxysporum f. sp. lycopersici (FOL) and F. oxysporum f. sp. radicis lycopersici (FORL) noted 60 days post-inoculation under growth chamber conditions. Chitosan (4 mg/ml) and SA (10 mM) were applied as soil drench five days before inoculation. Wilt severity was assessed based on 0-5 scale (where 0 = no symptoms and 5=dead plant)