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Table 3 Efficacy of different biopesticides against eggs 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 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

42.1 ± 2.2cd

65.1 ± 0.7e

81.8 ± 1.8c

63.0 ± 11.5a

15

46.5 ± 0.4c

67.7 ± 1.5de

83.4 ± 0.2c

65.9 ± 10.7a

Lecanicillium lecanii (1 × 109 CFU/ml)

10

41.3 ± 2.4cd

65.6 ± 1.3e

83.0 ± 0.3c

63.3 ± 12.1a

15

45.2 ± 1.1c

72.0 ± 1.2cd

85.1 ± 3.0c

67.4 ± 11.7a

Metarhizium anisopliae (1 × 108 CFU/ml)

10

37.7 ± 0.7d

61.6 ± 2.8e

81.3 ± 1.5c

60.2 ± 12.6a

15

40.8 ± 1.7cd

64.0 ± 1.0e

82.8 ± 1.7c

62.5 ± 12.1a

Neem Baan

(1% W/W)

10

59.3 ± 2.3b

77.4 ± 3.1bc

90.9 ± 2.3b

75.9 ± 9.2a

15

62.6 ± 3.9b

79.6 ± 1.5b

92.4 ± 2.0b

78.2 ± 8.6a

Malathion 50 EC

4.0

77.5 ± 2.9a

89.8 ± 2.8a

98.1 ± 1.9a

88.5 ± 6.0a

F values

 

35.5

22.2

10.2

0.8

P

 

< 0.001

< 0.001

< 0.001

0.6

  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 = 3.3 to 5.4 eggs/leaf
  2. *Values represent means of 3 replicates