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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