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Table 5 Effect of foliar spray 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 Concentration (mg D.Wt/L)* Galls/root Egg masses/root Eggs/mass Final population (Pf) Rf**
Pre- inoculation
Periwinkle 500 18 de 43 cd 116 a 4959 d 2.5 d
1000 42 c 104 a 108 b 11,232 a 5.6 a
2000 89 a 114 a 59 d 6726 c 3.4 c
Solidago 500 38 c 79 b 38 f 3002 e 1.5 e
1000 16 e 81 b 43 e 3483 e 1.7 e
2000 21 d 28 d 10 h 280 g 0.1 g
Vydate® 24% SL 3 ml/L 22 d 58 c 30 g 1725 f 0.9 f
Check Water only 69 b 115 a 66 c 7590 b 3.8 b
With inoculation
Periwinkle 500 14 d 15 c 25 g 375 c 0.2 c
1000 44 b 39 e 27 f 1053 b 0.5 b
2000 18 d 17 c 15 h 255 c 0.1 c
Solidago 500 17 d 18 c 107 b 1926 a 1.0 a
1000 15 d 18 c 113 a 2072 a 1.0 a
2000 22 c 9 d 104 c 901 b 0.5 b
Vydate® 24% SL 3 ml/L 66 a 27 b 76 d 2077 a 1.0 a
Check water only 8 e 26 b 70 e 1820 a 0.9 a
Post-inoculation
Periwinkle 500 38 a 55 a 55 f 3025 c 1.5 c
1000 7 c 13 e 98 c 1274 d 0.6 d
2000 9 c 17 d 78 d 1326 d 0.7 d
Solidago 500 13 b 31 b 171 b 5301 b 2.7 b
1000 2 d 3 f 0 h 0 e 0.0 e
2000 14 b 16 de 56 e 896 d 0.4 d
Vydate® 24% SL 3 ml/L 8 c 15 de 12 g 180 e 0.1 e
Check Water only 6 c 26 c 428 a 11,128 a 5.6 a
  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)