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Table 6 Efficacy of different biopesticides against adults of Bemisia tabaci on cucumber under net house conditions during autumn cropping season (2017)

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

36.3 ± 7.8d

47.8 ± 8.2b

58.5 ± 6.7b

47.5 ± 6.4b

15

41.5 ± 6.6bcd

50.7 ± 5.8b

62.3 ± 3.3b

51.5 ± 6.0b

Lecanicillium lecanii (1 × 109 CFU/ml)

10

40.8 ± 6.4bcd

50.5 ± 9.5b

64.9 ± 3.4b

52.1 ± 7.0b

15

45.4 ± 7.8bcd

54.5 ± 7.3b

66.7 ± 6.8b

55.5 ± 6.2b

Metarhizium anisopliae (1 × 108 CFU/ml)

10

35.6 ± 9.3d

46.3 ± 8.8b

57.9 ± 11.0b

46.6 ± 6.4b

15

39.8 ± 10.5cd

45.7 ± 12.2b

57.7 ± 11.8b

47.7 ± 5.3b

Neem Baan (1% W/W)

10

61.0 ± 3.3abc

83.9 ± 3.7a

93.1 ± 1.8a

79.3 ± 9.5a

15

63.0 ± 4.0ab

87.0 ± 1.0a

94.0 ± 1.6a

81.3 ± 9.4a

Malathion 50 EC

4.0

74.1 ± 3.2a

88.7 ± 3.8a

98.4 ± 1.2a

87.1 ± 7.1a

F values

 

3.9

6.4

7.0

5.3

P

 

0.008

0.001

< 0.001

0.002

  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 = 5.9 to 7.1 adults/3 leaves
  2. *Values represent means of 3 replicates