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Table 5 Efficacy of different biopesticides against nymphs 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 nymphs 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 46.0 ± 4.3b 69.3 ± 3.5d 85.8 ± 3.6c 67.0 ± 11.5a
15 48.2 ± 5.9ab 73.8 ± 2.1bcd 89.9 ± 2.2bc 70.6 ± 12.1a
Lecanicillium lecanii (1 × 109 CFU/ml) 10 46.0 ± 6.9b 70.5 ± 4.0cd 85.7 ± 2.6c 67.4 ± 11.6a
15 50.6 ± 4.6ab 75.3 ± 2.8bcd 91.1 ± 2.6bc 72.3 ± 11.8a
Metarhizium anisopliae (1 × 108 CFU/ml) 10 41.6 ± 9.8b 65.5 ± 3.7d 83.8 ± 0.6c 63.6 ± 12.2a
15 46.1 ± 8.7b 67.3 ± 4.4d 85.9 ± 4.3c 66.4 ± 11.5a
Neem Baan (1% W/W) 10 57.8 ± 6.5ab 79.8 ± 2.0bc 94.5 ± 1.8ab 77.4 ± 10.7a
15 62.5 ± 6.4ab 83.0 ± 1.6ab 97.1 ± 1.0ab 80.9 ± 10.0a
Malathion 50 EC 4.0 77.7 ± 0.4a 90.3 ± 1.9a 99.5 ± 0.5a 89.2 ± 6.3a
F values   3.1 7.0 5.2 0.6
P   0.23 < 0.001 0.002 0.8
  1. Percent reduction over control mean ± standard error of B. tabaci nymphs 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 nymphs = 14.9 to 18.0 nymphs/leaf
  2. *Values represent means of 3 replicates