Protective effect of Bacillus subtilis, B. pumilus, and Pseudomonas fluorescens isolates against root knot nematode Meloidogyne incognita on cowpea

Bulletin of the National Research Centre

Table 2 Effects of Bacillus subtilis, B. pumilus, and Pseudomonas fluorescens isolates on vegetative growth parameters of cowpea grown under screen house conditions and infected with root knot nematode, Meloidogyne incognita

Treatments	Plant growth parameters/plant (g)								Average total percentage plant growth parameter increase (%)
	Shoot				Root
	Fresh weight		Dry weight		Fresh weight		Dry weight
	Weight	Inc. (%)	Weight	Inc. (%)	Weight	Inc. (%)	Weight	Inc. (%)
B. subtilis (Bs₁)	63.9g	25	12.5ef	5	32.5abc	45	2.2ab	57	33.0
B. subtilis (Bs₂)	65.4f	28	12.8def	8	28.3bc	26	2.0abc	43	26.3
B. pumilus (Bp₁)	120.0a	135	22.7a	91	42.8a	91	2.5a	79	99.0
B. pumilus (Bp₂)	113.4b	122	19.2b	61	43.2a	93	2.4a	71	86.8
P. fluorescens (Pf₁)	68.8d	35	13.3d	12	26.6c	19	2.0abc	43	27.3
P. fluorescens (Pf₂)	66.7e	31	13.1de	10	41.6a	86	2.1ab	50	44.3
Carbofuran 10%	80.5c	58	16.2c	36	38.5ab	72	2.3a	64	57.5
Medium only	61.7h	21	12.3f	3	25.3c	13	1.6bc	14	12.8
Nematode only (control)	51.1i	–	11.9f	–	22.4c	–	1.4c	–	–

Means are averages of four replicates. Means followed by different letter(s) are significantly different according to Duncan^’s multiple range test at P ≤ 0.05. Inc. increase