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Table 4 Persistence of plant powders in protection potato tubers from PTM Phthorimaea operculella infestation during different intervals of storage

From: Protection of stored potatoes from infestation with the potato tuber moth, Phthorimaea operculella (Zeller)(Lepidoptera: Gelechiidae) using plant powders

Plant powders Tuber damage index (DI) at intervals in weeks
Mean ± SE
2nd 4th 6th 8th 10th 12th
Zyhgophyllum 0 h 0 h 0 h 0 h 4.80 ± 0.6 f 6.50 ± 0.28 b
Coriander 0 h 0 h 0 h 0 h 6.80 ± 0.17 f 6.80 ± 0.44 b
Colocynth 8.78 ± 0.49 g 9.35 ± 0.30 b 15.00 ± 1.00 f 16.67 ± 0.67 e 18.00 ± 1.15 e 29.96 ± 0.03 a
Jasmine 11.40 ± 0.36 f 12.00 ± 10.05 g 16.05 ± 2.03 ef 19.00 ± 0.05 de 20.05 ± 0.53 de 29.98 ± 0.02 a
Mint 13.33 ± 0.44 ed 13.83 ± 0.17 f 15.33 ± 0.33 f 17.00 ± 1.00 e 17.33 ± 1.33 e 29.60 ± 0.32 a
Basil 15.00 ± 0.58 d 15.67 ± 0.33 e 16.66 ± 0.53 de 18.90 ± 0.67 de 19.33 ± 0.88 de 29.97 ± 0.33 a
Camomile 15.00 ± 1.00 d 16.00 ± 0.67 e 16.67 ± 0.67 e 18.70 ± 0.36 de 21.33 ± 1.86 de 29.59 ± 0.05 a
Geranium 16.60 ± 0.53 cd 17.47 ± 0.23 d 18.23 ± 0.91 cd 22.00 ± 1.70 bc 22.33 ± 1.5 bc 29.99 ± 0.07 a
Senna 17.36 ± 0.37 c 18.07 ± 0.33 cd 19.67 ± 0.33 bc 21.33 ± 0.67 bc 21.33 ± 0.66 bc 29.99 ± 0.01 a
Harmel 18.52 ± 0.29 bc 18.76 ± 0.03 c 19.00 ± 0.58 bc 19.67 ± 0.33 cd 20.33 ± 0.88 cd 29.80 ± 0.17 a
Solanum 20.00 ± 0.58 b 20.00 ± 0.00 b 20.67 ± 0.67 bc 21.30 ± 0.67 bc 22.33 ± 1.45 bc 29.99 ± 0.01 a
Arnoglosse 20.00 ± 1.50 b 20.67 ± 0.67 b 21.33 ± 0.67 b 23.00 ± 1.00 b 24.00 ± 1.00 b 29.99 ± 0.00 a
Control 30.00 ± 0.00 a 30.00 ± 0.00 a 30.00 ± 0.00 a 30.00 ± 0.00 a 30.00 ± 0.00 a 30.00 ± 0.00 a
LSD 0.05 1.78 0.81 2.52 2.34 3.07 0.58
LSD 0.01 2.42 1.10 3.43 3.24 1.14 0.79
  1. Means with the same letters are not significantly different in vertical column (P < 0)