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. 2018 Jul 16;115(33):E7700–E7709. doi: 10.1073/pnas.1721436115

Table 4.

Sample means of variables

Variable No. of observations Mean SD Min Max
Infestation level: cotton aphid 1,228 2.77 1.14 1 5
Infestation level: mirid bugs 1,228 2.14 1.19 1 5
Infestation level: cotton bollworm 1,228 3.05 1.31 1 5
No. of insecticide applications: cotton aphid 1,228 3.25 2.16 0 17
No. of insecticide applications: mirid bugs 1,228 2.17 2.17 0 14
No. of insecticide applications: cotton bollworm 1,228 5.07 4.11 0 33
Share of cotton area in total cultivated area, % 1,228 19.82 13.25 0.05 67.29
Share of Bt cotton area in total cotton area, % 1,228 57.55 45.50 0 100
Percentage of cultivated area, % 1,326 54.64 10.07 18.72 72.66
Percentage of forest area, % 1,326 5.02 9.41 0.03 60.52
Percentage of grassland area, % 1,326 4.27 6.69 0 33.18
Percentage of built-up area, % 1,326 25.61 7.52 7.79 56.58
Percentage of water body area, % 1,326 9.53 8.44 0.88 37.45
Percentage of unused land area, % 1,326 0.92 3.06 0 25.79
Land use diversity (Shannon diversity) 1,326 2.98 0.59 2.04 4.18
Monthly mean temperature, °C
 May 1,275 20.46 1.82 14.31 24.75
 June 1,275 24.79 1.90 18.1 28.6
 July 1,275 26.93 1.79 20.28 31.28
 August 1,275 25.67 1.87 20 30.78
Monthly total precipitation, mm
 May 1,275 76.68 67.50 0 390.5
 June 1,275 108.16 95.67 1.30 645.7
 July 1,275 169.27 113.60 5.7 806.3
 August 1,275 146.63 105.90 0.70 639.2