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Table 6 Effect of soil drench of periwinkle and solidago aqueous extracts at different concentrations and application time on M. incognita infecting sunflower plants

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

Plant extract Conc. (mg D.Wt/L)* Galls/root Egg masses/root Eggs/mass Final population (Pf) Rf**
Pre-inoculation
Periwinkle 500 63 c 176 a 38 b 6698 a 3.3 a
1000 64 c 91 c 39 a 3549 b 1.8 b
2000 149 a 171 a 15 g 2565 d 1.3 d
Solidago 500 36 e 93 c 26 e 2418 d 1.2 e
1000 72 b 89 c 20 f 1770 f 0.9 f
2000 43 d 69 d 32 c 2208 e 1.1 e
Vydate® 24% SL 0.1 ml/L 45 d 17 e 8 h 136 g 0.1 g
Check Water only 76 b 111 b 30 d 3330 c 1.7 c
With inoculation
Periwinkle 500 11 c 33 a 89 c 2959 a 1.5 a
1000 10 c 23 b 74 d 1665 b 0.8 b
2000 9 c 14 c 92 b 1288 b 0.6 b
Solidago 500 11 bc 17 c 179 a 2998 a 1.5 a
1000 16 a 28 b 63 f 1733 b 0.9 b
2000 14 ab 15 c 29 g 421 c 0.2 c
Vydate® 24% SL 0.1 ml/L 1 d 0 d 0 h 0 c 0.0 c
Check Water only 10 c 25 b 71 e 1775 b 0.9 b
Post-inoculation
Periwinkle 500 52 b 49 c 87 c 4263 c 2.1 c
1000 52 b 40 d 75 e 2963 d 1.5 d
2000 65 a 74 a 88 b 6490 a 3.2 a
Solidago 500 53 b 33 e 68 f 2210 e 1.1 e
1000 65 a 62 b 50 h 3100 d 1.6 d
2000 70 a 41 d 75 d 3038 d 1.5 d
Vydate® 24% SL 0.1 ml/L 11 c 16 f 65 g 1056 f 0.5 f
Check Water only 66 a 52 c 99 a 5148 b 2.6 b
  1. Means in the same column followed by the different letter(s) are significantly different at p < 0.05 according to Duncan’s multiple range tests
  2. *mg D.Wt./L = milligram dry leaves/liter of water
  3. **Rf (reproduction factor) = Pf (final population)/Pi (inatial population)