Screening the nematicidal potential of indigenous medicinal plant extracts against Meloidogyne incognita under lab. and greenhouse conditions

Egyptian Journal of Biological Pest Control

Table 3 Mortality percentages of M. incognita J2 as influenced by dry leaves ethanolic extracts of selected medicinal plants at different dilutions

Ethanolic extract (X stock solution = 25,000 mg D.Wt./L)	^aMortality (%)			Accumulative mortality	^bToxicity index	Lethal concentrations (mg D.Wt./L)^c
Ethanolic extract (X stock solution = 25,000 mg D.Wt./L)	1:2 × (12,500 mg DW/L)	1:4 × (6250 mg DW/L)	1:8 × (3120 mg DW/L)	Accumulative mortality	^bToxicity index	LC₅₀	LC₉₀
Basil	55	74	51	180	0.5	4465	67721
Caraway	86	39	22	147	0.3	7118	16549
Chamomile	39	31	11	80	0.1	17799	71141
Common mint	71	63	17	151	0.3	7111	20271
Coriander	61	84	21	165	0.4	5929	16457
Dill	65	8	7	80	0.2	11376	19052
Geranium	83	88	57	229	0.8	2597	13139
Horsemint	57	17	10	84	0.2	12718	41034
Marjoram	65	94	61	221	0.7	3015	13889
Periwinkle	32	55	51	138	0.2	10410	149504
Rosemary	61	35	20	115	0.2	10623	39146
Solidago	49	94	67	210	1.0	2085	14702
Thyme	100	54	30	184	0.4	5533	13071
Check (tap water)	27	8	9

^a\( \mathsf{Mortality}\%=\frac{\mathsf{Number}\ \mathsf{of}\ \mathsf{dead}\ \mathsf{J}\mathsf{2}\ \mathsf{in}\ \mathsf{a}\ \mathsf{treatment}}{\mathsf{Number}\ \mathsf{of}\ \mathsf{totals}\ \mathsf{tested}\ \mathsf{J}\mathsf{2}\ \mathsf{in}\ \mathsf{the}\ \mathsf{same}\ \mathsf{treatment}} \)
^b\( \mathsf{Toxicity}\ \mathsf{index}=\frac{\mathsf{LC50}\ \mathsf{of}\ \mathsf{the}\ \mathsf{highest}\ \mathsf{effective}\ \mathsf{extract}}{\mathsf{LC50}\ \mathsf{of}\ \mathsf{each}\ \mathsf{extract}} \)
^cmg D.Wt./L= milligram dry leaves per liter