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Table 7 Efficacy of different biopesticides against adults of Bemisia tabaci on cucumber under net house conditions during autumn cropping season (2018)

From: Efficacy of biopesticides against the whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), on parthenocarpic cucumber grown under protected environment in India

Treatment

Concentrations (ml/l)

Percent reduction over control in adults of Bemisia tabaci per three leaves *(mean ± SE) after different sprays

1st spray

2nd spray

3rd spray

Overall reduction (%)

Beauveria bassiana (1 × 109 CFU/ml)

10

40.0 ± 3.2c

51.6 ± 4.7b

61.4 ± 6.7b

51.0 ± 6.2c

15

43.6 ± 1.8c

51.7 ± 10.4b

65.4 ± 1.1b

53.6 ± 6.4c

Lecanicillium lecanii (1 × 109 CFU/ml)

10

40.5 ± 2.1c

53.4 ± 5.8b

64.6 ± 7.1b

52.8 ± 7.0c

15

45.3 ± 2.3c

56.7 ± 3.4b

69.2 ± 4.3b

57.1 ± 6.9bc

Metarhizium anisopliae (1 × 108 CFU/ml)

10

36.3 ± 1.2c

47.9 ± 2.6b

60.3 ± 5.2b

48.2 ± 6.9c

15

40.0 ± 1.9c

49.2 ± 5.2b

62.8 ± 5.8b

50.7 ± 6.6c

Neem Baan (1% W/W)

10

59.1 ± 5.7b

82.6 ± 1.2a

92.4 ± 0.2a

78.0 ± 9.9ab

15

61.9 ± 6.0b

85.2 ± 1.4a

94.2 ± 2.2a

80.4 ± 9.6a

Malathion 50 EC

4.0

77.1 ± 2.4a

91.0 ± 0.8a

98.9 ± 1.1a

89.0 ± 6.4a

F values

 

16.4

12.9

12.5

4.4

P

 

< 0.001

< 0.001

< 0.001

0.004

  1. Percent reduction over control mean ± standard error of B. tabaci adults recorded after different sprays for bioassays performed with different commercial strains. Treatment columns bearing different letters are significantly different from other treatments according to Duncan’s multiple range test (DMRT) (P = 0.05). Range of pretreatment population adults = 5.8 to 7.4 adults/3 leaves
  2. *Values represent means of 3 replicates