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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