Antagonistic potential of an Egyptian entomopathogenic nematode, compost and two native endophytic bacteria isolates against the root-knot nematode (Meloidogyne incognita) infecting potato under field conditions

Egyptian Journal of Biological Pest Control

Table 4 Growth parameters at harvest of potato cv. Sponta infected with Meloidogyne incognita and treated with compost and bio-agents under field conditions

Treatments	Root length (cm)	% Increase	Plant height (cm)	% Increase	Tubers weight (g/plant)	% Increase	No. of tubers/plant	% Increase	Dry weight (g/plant)	% Increase	No. of Leaves/plant	% Increase	Yield/tons/feddan	% Increase
T1	11 e	–	21 d	–	210 f	–	3 b	–	45 c	–	11 d	–	3.3 g	–
T2	17 cb	54.6	40 c	90.5	420 e	100.0	5 a	66.7	80 c	77.8	16 c	45.4	6.6 e	100.0
T3	18 c	63.6	41 bc	95.2	600 c	185.7	6 a	100.0	119 b	164.4	22 ab	100.0	8.7d	163.6
T4	12 de	9.1	38 c	80.9	400 e	90.5	6a	100.0	120 b	166.7	18 bc	63.6	6.3 f	90.9
T5	21 bc	90.9	47 ab	123.8	640 b	204.8	5 a	66.7	61 d	35.6	25 a	127.3	10.1 b	206.8
T6	20 bc	81.8	52 a	147.6	555 d	164.3	6 a	100.0	65 d	44.4	24 a	118.2	9.5 c	187.0
T7	30 a	172.7	55 a	161.9	670 a	219.1	6 a	100.0	139 a	208.9	24 a	118.2	10.6 a	221.2
T8	25 ab	127. 0	51 ab	142.8	645 b	207.1	5 a	66.7	125 b	177.3	20 ab	81.8	10.2 b	209.0

Each value represents mean of five replicates. Means followed by the same letter(s) within a column are not significantly (P ≤ 0.05) different according to Duncan Multiple Range Test
Feddan = 4200 m² T1: Control, T2: Compost (C), T3: C + H. bacteriophora-infective juveniles (IJs) within Galleria mellonella cadaver, T4: C + H. bacteriophora IJs in water suspension,
T5: C + B. cereus Nem 212 cell suspension, T6: C + B. cereus Nem 212 supernatant (cell-free culture filtrate), T7: C + B. cereus Nem 213 cell suspension, T8: C + B. cereus Nem 213 supernatant (cell-free culture filtrate)