The nematicidal potentiality of some algal extracts and their role in enhancement the tomato defense genes against root knot - nematodes

Egyptian Journal of Biological Pest Control

Table 2 Effect of three marine algal extracts on J₂ mortality of Meloidogyne incognita under laboratory conditions

Treatments	J2 mortality (%) Exposure time (h)
Treatments	12h	24h	48h
Control	8.40^f	13.40^f	14.60^f
Corallina mediteranea mg/ml
0.125	46.75^de	18.40^de	18.40^de
0.25	39.00^e	14.80^e	14.80^e
0.5	57.00^cd	23.20^cd	23.20^cd
1	85.00^a	35.60^a	35.60^a
Corallina officinalis mg/ml
0.125	41.50^e	16.20^e	16.20^e
0.25	60.25^cd	24.60^cd	24.60^cd
0.5	66.00^bc	26.80^bc	26.80^bc
1	68.00^bc	27.60^bc	27.60^bc
Ulva fasciata mg/ml
0.125	39.25^e	15.40^e	15.40^e
0.25	63.75^c	25.60^c	25.60^c
0.5	80.40^ab	33.20^ab	33.20^ab
1	85.00^a	35.60^a	35.60^a
Oxamyl5μl/ml	40.00^a	78.60^a	95.60^a
Mortality = [number of dead juveniles J₂/ total number of juveniles J₂] × 100

Means followed by the same letter (s) are not significantly different by Duncan’s multiple range test (P ≤ 0.05)