Table 2 Average number and reduction% of Thrips tabaci after application of plant extracts and Aerosil 200® in an onion field compared to that of the control field
Compound | Aerosil 200® | Trigonella foenum-graecum | Mentha arvensis | Matricaria chamomilla | Cinnamomum camphora | Untreated control | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
concentration | 2ml/l | 4ml/l | 4000 ppm | 8000 ppm | 4000 ppm | 8000 ppm | 4000 ppm | 8000ppm | 4000 ppm | 8000 ppm | |
Pre-treatment | 41.65±5.2 | 41.05±4.8 | 43.75±3.6 | 39.9±3.5 | 41.25±4.2 | 46.9±4.4 | |||||
After 24 hrs | 13.95±3.4 | 5.65±1.8 | 15.5±3.6 | 6.45±3.7 | 14.75±3.0 | 4.75±1.9 | 17.35±3.6 | 8.45±3.1 | 11.1±2.4 | 2.95±0.9 | 38.95±4.1 |
Reduction % | 59.67 | 83.66 | 54.53 | 81.08 | 59.40 | 86.92 | 47.64 | 74.49 | 67.59 | 91.38 | - |
After 3 days | 8.2±1.8 | 3.65±1.4 | 10.95±3.9 | 3.9±2.1 | 10.9±4.5 | 3.45±2.3 | 14.1±3.5 | 5.35±3.1 | 5.7±2.3 | 2±1.1 | 34.95±7.7 |
Reduction % | 73.58 | 88.24 | 64.20 | 87.25 | 66.56 | 89.41 | 52.75 | 82.00 | 81.45 | 93.49 | - |
After 7 days | 11.3±3.1 | 6.35±1.9 | 12.2±2.9 | 8.85±3.9 | 12.5±5.3 | 8.55±1.6 | 14.65±3.9 | 7.25±3.3 | 11.9±4.6 | 5.5±1.8 | 30.4±6.7 |
Reduction % | 58.14 | 76.478 | 54.14 | 66.73 | 55.92 | 69.85 | 43.35 | 71.96 | 55.49 | 79.42 | - |
After 10 days | 17.1±2.4 | 11.45±2.6 | 18.65±3.4 | 12.65±3.9 | 17.25±5.2 | 11.95±4.4 | 22.45±5.0 | 12.9±4.2 | 13.5±3.2 | 9.55±1.7 | 28.55±5.9 |
Reduction % | 32.55 | 54.83 | 25.36 | 49.37 | 35.22 | 55.12 | 28.15 | 46.88 | 46.32 | 61.96 | - |