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Table 3 Cost of cultivation and economics returns from various treatments in the management of C. infuscatellus

From: Evaluation of augmentative biological control strategy against major borer insect pests of sugarcane—a large-scale field appraisal

Year Treatments Yield (t ha−1) Cost of cultivationb (USD ha−1) Gross returns (USD ha−1) Benefit:cost ratio
2015 Biocontrol practicea 71.66 1803.08 3140.61 1.74
  Farmers’ practice 79.10 1828.70 3466.68 1.90
  Untreated control 65.22 1793.56 2858.36 1.59
2016 Biocontrol practicea 72.00 1816.09 3129.97 1.72
  Farmers’ practice 84.25 1878.72 3662.51 1.95
  Untreated control 65.60 1801.36 2851.75 1.58
2017 Biocontrol practicea 70.62 1996.24 3316.53 1.66
  Farmers’ practice 82.37 2064.73 3868.35 1.87
  Untreated control 63.95 1980.59 3003.29 1.52
2018 Biocontrol practicea 71.15 1891.93 3161.32 1.67
  Farmers’ practice 83.88 1958.22 3726.93 1.90
  Untreated control 56.50 1877.60 2510.39 1.34
2019 Biocontrol practicea 70.18 1895.14 3047.88 1.61
  Farmers’ practice 84.02 1959.93 3648.95 1.86
  Untreated control 64.00 1881.13 2779.49 1.48
Pooled mean Biocontrol practicea 71.12 1879.80 3156.45 1.68
Farmers’ practice 82.72 1937.52 3673.57 1.90
  Untreated control 63.05 1866.14 2796.22 1.50
  1. a8 releases of T. chilonis at 50,000 per ha at 10 days interval during April to June; Price of sugarcane: USD 43.83, 43.47, 46.96, 44.43, and 43.43 tonne−1 during 2015, 2016, 2017, 2018, and 2019, respectively
  2. bIncludes trichocard/insecticide + labor cost