Examine medicinal plants from South Africa for suppression of Meloidogyne incognita under glasshouse conditions

Reproductive potential (RP) of Meloidogyne incognita race 2 on tomato cv_ “Floradade” plants treated with soil amendments at 65 days after inoculation_

Plant species	2006	2007	2008	2009	2011
Cassia abbreviata	1.3 b	0.7 bc	−	−	−
Cissus cactiformis	0.8 b	0.6 c	0.2 b	0.2 b	0.6 bc
Euphorbia ingens	0.8 b	1.2 b	0.3 b	0.2 b	0.6 bc
Ipomoea kituiensis	0.9 b	1.0 bc	−	−	−
Synadenium cupulare	0.7 b	0.8 bc	0.3 b	0.1 b	0.9 bc
Senna petersiana	1.0 b	0.7 bc	−	−	−
Urginea sanguinea	0.9 b	1.2 b	−	−	−
Maerua angolensis	−	−	0.2 b	0.2 b	2.2 b
Tabernaemontana elegans	−	−	0.2 b	0.1 b	1.2 bc
Cucumis myriocarpus	−	−	−	−	0.9 bc
Fenamiphos	−	−	0.4 b	0.2 b	0.0 bc
Untreated control	4.1 a	4.4 a	1.8 a	1.4 a	10.0 a
LSD	0.7165	0.6114	0.1415	0.1273	2.0788
P-value	≤ 0.001	≤ 0.001	≤ 0.001	≤ 0.001	≤ 0.001
F-value	19.97	34.84	137.72	108.15	15.20

Reproduction of Meloidogyne incognita race 2 on tomato cv_ Floradade plants treated with soil amendments of nine plant species at 65 days after inoculation with 3,000 eggs and second-stage juveniles (J2)_

	Eggs  +  J2/root system
Plant species	2006	2007	2008	2009	2011
Cassia abbreviata	3 925 b	2 050 d	−	−	−
Cissus cactiformis	2 500 cd	1 700 d	662 c	1 000 b	1 688 bc
Euphorbia ingens	2 500 cd	3 562 b	862 bc	788 cd	1 838 bc
Ipomoea kituiensis	2 575 cd	3 000 bc	−	−	−
Synadenium cupulare	2 125 d	2 538 cd	762 bc	562 d	2 588 bc
Senna petersiana	3 125 bc	2 088 d	−	−	−
Urginea sanguinea	2 775 cd	3 600 b	−	−	−
Maerua angolensis	−	−	650 c	688 cd	6 687 b
Tabernaemontana elegans	−	−	712 c	650 bcd	3 588 bc
Cucumis myriocarpus	−	−	−	−	2 550 c
Fenamiphos	−	−	1 050 b	875 bc	138 d
Untreated control	12 225 a	13 238 a	5 388 a	5 188 a	30 063 a

Fresh root and shoot weight of tomato cv_ Floradade plants treated with soil amendments of nine plant species at 65 days after inoculation with 3,000 eggs and second-stage juveniles (J2) of Meloidogyne incognita race 2_

	Fresh root weight (g)					Fresh shoot weight (g)
Plant species	2006	2007	2008	2009	2011	2006	2007	2008	2009	2011
Cassia abbreviata	2.8 a	3.0 b	−	−	−	3.7 d	3.7 c	−	−	−
Cissus cactiformis	2.9 a	2.8 bc	30.2 a	20.6 a	14.1 d	9.2 a	8.6 a	9.9 ab	10.0 a	83.7 a
Euphorbia ingens	2.0 a	1.8 d	23.3 a	19.0 a	−	7.2 b	7.7 a	8.6 bc	8.1 abc	80.5 a
Ipomoea kituiensis	3.2 a	4.6 a	−	−	15.2 d	3.3 d	3.7 c	−	−	−
Synadenium cupulare	2.4 a	2.1 cd	22.1 bc	20.2 a	19.2 ab	5.3 c	6.4 b	7.6 c	9.2 ab	70.2 c
Senna petersiana	2.6 a	1.8 d	−	−	−	4.0 d	3.8 c	−	−	−
Urginea sanguinea	2.5 a	2.5 bcd	−	−	−	4.0 d	3.9 c	−	−	−
Maerua angolensis	−	−	25.3 b	14.9 b	17.6 bc	−	−	8.7 bc	7.1 bc	81.5 a
Tabernaemontana elegans	−	−	30.8 a	19.5 a	15.1 d	−	−	10.0 a	9.8 a	79.2 ab
Cucumis myriocarpus	−	−	−	−	20.0 a	−	−	−	−	68.1 cd
Fenamiphos	−	−	30.7 a	22.3 a	15.9 cd	−	−	10.0 a	10.4 a	73.3 bc
Untreated control	2.2 a	1.8 d	21.6 c	14.6 b	11.2 e	3.4 d	4.1 c	7.9 c	6.0 c	61.5 d