Research Article
Investigations on the Effects of Five Different Plant Extracts on the Two-Spotted Mite Tetranychus urticae Koch (Arachnida: Tetranychidae)
Table 1
Effect (mean ± SE) and mortality (%) of extracts obtained from different five plants on T. urticae.
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Treatment | Leaf-dipping method | Leaf-spraying method | Larvae | Adult | Adult | Concentration (%) | Mortality (%) | Effect (%) | Mortality (%) | Effect (%) | Mortality (%) | Effect (%) |
| H. arenarium | 1 | 46 | 31.59 ± 4.00c | 37 | 25.32 ± 4.10c | 52 | 39.76 ± 5.18c | 3 | 53 | 41.59 ± 5.47bc | 47 | 37.22 ± 6.77bc | 66 | 59.88 ± 4.65b | 6 | 58 | 46.09 ± 2.53b | 51 | 42.36 ± 5.61b | 76 | 71.82 ± 1.76ab | 12 | 71 | 62.72 ± 2.28a | 64 | 56.85 ± 5.63a | 85 | 82.38 ± 1.92a |
| A. sativum | 1 | 46 | 31.30 ± 5.01b | 29 | 16.43 ± 2.43b | 66 | 59.76 ± 4.45b | 3 | 50 | 37.80 ± 5.96b | 34 | 27.59 ± 5.17ab | 69 | 65.45 ± 5.16ab | 6 | 56 | 43.37 ± 5.95b | 45 | 34.35 ± 6.76a | 77 | 72.79 ± 4.38a | 12 | 68 | 58.35 ± 6.31a | 49 | 39.49 ± 5.07a | 78 | 73.92 ± 3.16a |
| V. album | 1 | 50 | 35.83 ± 4.33c | 51 | 29.07 ± 4.71c | 47 | 33.57 ± 4.12c | 3 | 65 | 54.93 ± 5.22b | 61 | 42.41 ± 6.33b | 59 | 49.72 ± 3.39b | 6 | 75 | 65.37 ± 3.15ab | 78 | 51.57 ± 5.37a | 70 | 62.58 ± 2.98b | 12 | 77 | 70.55 ± 2.44a | 79 | 79.02 ± 3.76a | 81 | 75.77 ± 3.81a |
| T. parthenium | 1 | 49 | 38.22 ± 5.83c | 64 | 54.49 ± 4.34c | 47 | 33.61 ± 4.14c | 3 | 64 | 54.06 ± 3.14b | 77 | 69.58 ± 1.52b | 60 | 49.75 ± 3.41b | 6 | 75 | 67.89 ± 2.56a | 85 | 82.41 ± 1.94a | 71 | 62.62 ± 2.96b | 12 | 82 | 76.54 ± 3.51a | 88 | 83.47 ± 1.95a | 81 | 75.68 ± 3.77a |
| R. luteum | 1 | 44 | 31.87 ± 3.31b | 27 | 31.66 ± 4.50b | 37 | 25.81 ± 2.94c | 3 | 48 | 35.38 ± 4.05b | 44 | 34.02 ± 3.62b | 42 | 43.23 ± 3.40b | 6 | 74 | 66.14 ± 4.50a | 53 | 44.35 ± 4.43b | 58 | 50.31 ± 3.28ab | 12 | 81 | 75.62 ± 3.03a | 67 | 63.66 ± 2.44a | 68 | 61.97 ± 3.75a |
| | Control | 22 | 0 | 15 | 0 | 15 | 0 |
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Within columns, means ± SE followed by the same letter are not significantly different (DUNCAN’s multiple F-test ).
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