Table 2 Annual mean population of bollworms and tobacco caterpillar over the years 2009–2019
Year | Cotton bollworm | Spotted bollworm | Pink bollworm | Tobacco caterpillar | ||||
|---|---|---|---|---|---|---|---|---|
No. of larvae per plant | Male moth catches per trap in a week | No. of larvae per plant | Male moth catches per trap in a week | Green bolls infestation /% | Male moth catches per trap in a week | No. of larvae per pant | Male moth catches per trap in a week | |
2009–2010 | 0.36 ± 0.09 | 3.45 ± 1.23 | 0.13 ± 0.02 | 9.05 ± 3.25 | – | 0.45 ± 0.18 | 0.00 ± 0.00 | 180.18 ± 44.70 |
2010–2011 | 0.34 ± 0.11 | 3.25 ± 1.52 | 0.00 ± 0.00 | 13.30 ± 3.84 | – | 6.48 ± 2.14 | 0.00 ± 0.00 | 28.52 ± 3.89 |
2011–2012 | 0.37 ± 0.16 | 0.32 ± 0.10 | 0.00 ± 0.00 | 9.05 ± 3.25 | 1.45 ± 0.73 | 15.21 ± 6.25 | 0.01 ± 0.01 | 9.77 ± 2.58 |
2012–2013 | 0.05 ± 0.05 | 1.21 ± 0.38 | 0.00 ± 0.00 | 1.19 ± 0.24 | 8.00 ± 2.83 | 10.23 ± 4.02 | 0.00 ± 0.01 | 81.94 ± 22.36 |
2013–2014 | 0.03 ± 0.01 | 2.56 ± 0.76 | 0.00 ± 0.00 | 0.80 ± 0.14 | 23.46 ± 4.01 | 18.81 ± 6.29 | 0.00 ± 0.00 | 25.07 ± 4.64 |
2014–2015 | 0.00 ± 0.00 | 2.24 ± 0.67 | 0.00 ± 0.00 | 1.10 ± 0.34 | 15.38 ± 3.64 | 4.17 ± 1.52 | 0.11 ± 0.05 | 109.69 ± 60.01 |
2015–2016 | 0.00 ± 0.00 | 2.78 ± 0.68 | 0.00 ± 0.00 | 2.72 ± 0.88 | 18.27 ± 2.50 | 15.66 ± 5.95 | 0.00 ± 0.01 | 16.80 ± 2.76 |
2016–2017 | 0.00 ± 0.00 | 3.23 ± 1.10 | 0.00 ± 0.00 | 2.36 ± 0.60 | 8.32 ± 2.37 | 7.70 ± 2.13 | 0.00 ± 0.00 | 23.11 ± 4.92 |
2017–2018 | 0.03 ± 0.02 | 1.47 ± 0.31 | 0.01 ± 0.01 | 1.72 ± 0.30 | 55.86 ± 5.77 | 15.77 ± 5.78 | 0.00 ± 0.00 | 9.26 ± 1.23 |
2018–2019 | 0.04 ± 0.02 | 1.65 ± 0.40 | 0.00 ± 0.00 | 0.32 ± 0.09 | 18.13 ± 3.89 | 2.32 ± 0.44 | 0.00 ± 0.00 | 6.14 ± 1.57 |
2019–2020 | 0.00 ± 0.00 | 1.38 ± 0.28 | 0.00 ± 0.00 | 0.97 ± 0.25 | 17.63 ± 4.29 | 4.58 ± 1.42 | 0.00 ± 0.00 | 20.43 ± 2.15 |