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Table 2 Efficacy of different biopesticides against eggs 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 eggs of Bemisia tabaci per leaf *(mean ± SE) after different sprays

1st spray

2nd spray

3rd spray

Overall reduction (%)

Beauveria bassiana (1 × 109 CFU/ml)

10

41.8 ± 1.0e

66.3 ± 1.8ef

80.6 ± 0.3ef

62.9 ± 11.3a

15

45.5 ± 1.3d

70.4 ± 0.4de

85.5 ± 1.5de

67.1 ± 11.7a

Lecanicillium lecanii (1 × 109 CFU/ml)

10

41.2 ± 1.7e

66.9 ± 0.8ef

82.9 ± 2.3def

63.7 ± 12.1a

15

46.2 ± 0.8d

72.8 ± 1.7cd

86.5 ± 2.5cd

68.5 ± 11.8a

Metarhizium anisopliae (1 × 108 CFU/ml)

10

36.5 ± 0.9f

63.9 ± 0.2f

78.4 ± 0.7f

59.6 ± 12.3a

15

39.5 ± 0.9ef

64.7 ± 0.4f

82.4 ± 1.7def

62.2 ± 12.4a

Neem Baan (1% W/W)

10

59.8 ± 1.4c

77.2 ± 0.9bc

90.7 ± 1.0bc

75.9 ± 8.9a

15

63.7 ± 0.7b

78.3 ± 2.8b

93.3 ± 2.3ab

78.4 ± 8.5a

Malathion 50 EC

4.0

76.8 ± 0.6a

87.6 ± 3.1a

97.5 ± 1.2a

87.3 ± 6.0a

F values

 

151.1

21.4

14.2

0.7

P

 

< 0.001

< 0.001

< 0.001

0.7

  1. Percent reduction over control mean ± standard error of B. tabaci eggs 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 eggs = 3.6 to 5.7 eggs/leaf
  2. *Values represent means of 3 replicates