Table 1.

Inhibitory efficacy of P. polymyxa ShX301 against Verticillium wilt of cotton^a.

Disease grade		0	1	2	3	4	Disease severity (%)
Treatment1 (V. dahliae+P. polymyxaShX301)	R1	48	2	4	6	2	15.30	13.50 ± 1.58
	R2	50	1	4	5	2	12.90
	R3	48	3	7	3	1	12.31
Treatment2 (V. dahliae)	R1	3	20	14	12	13	57.63	53.83 ± 1.67
	R2	6	21	12	13	11	50.29
	R3	5	21	10	14	13	53.57
Ck1 (P. polymyxaShX301)	R1	61	0	0	0	0	0.0	0.0
	R2	61	0	0	0	0	0.0
	R3	63	0	0	0	0	0.0
Ck2 (sterile water)	R1	62	0	0	0	0	0.0	0.0
	R2	63	0	0	0	0	0.0
	R3	61	0	0	0	0	0.0

ΔDisease severity was assessed for each plant on a 0 to 4 rating scale according to the percentage of foliage affected by acropetal chlorosis, necrosis, wilt, and/or defoliation (0 = healthy plant, 1 = 1 to 33%, 2 = 34 to 66%, 3 = 67 to 99%, 4 = dead plant)as described by Bejaranoalcazar et al. [3].

^aThe disease assessment was carried out 45 days after planting for each plant on a 0 to 4 rating scale (0 = healthy plant, 1 = 1–33%, 2 = 34–66%, 3 = 67–99%, 4 = dead plant). Disease severity (%) = Σ (disease ratings × number of plants)/(maximum rating value × Total number of plants) × 100. R: repetition.