Skip to main content

Table 4 Efficacy of different biopesticides against nymphs 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 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 48.6 ± 2.9c 72.1 ± 2.6de 88.9 ± 2.2cd 69.9 ± 11.7a
15 50.2 ± 2.4c 76.4 ± 2.7cd 91.2 ± 2.6bcd 72.6 ± 12.0a
Lecanicillium lecanii (1 × 109 CFU/ml) 10 49.7 ± 1.6c 74.1 ± 2.9de 90.1 ± 2.0bcd 71.3 ± 11.7a
15 51.6 ± 1.1c 77.5 ± 1.8bcd 91.5 ± 2.2bcd 73.5 ± 11.7a
Metarhizium anisopliae (1 × 108 CFU/ml) 10 46.1 ± 1.7c 68.2 ± 2.8e 82.5 ± 3.3e 65.6 ± 10.6a
15 48.6 ± 4.0c 71.4 ± 1.9de 85.0 ± 2.0de 68.3 ± 10.6a
Neem Baan (1% W/W) 10 60.5 ± 5.4b 81.9 ± 3.2bc 93.3 ± 1.5abc 78.6 ± 9.6a
15 65.5 ± 1.7b 84.2 ± 0.9b 96.3 ± 0.7ab 82.0 ± 9.0a
Malathion 50 EC 4.0 75.6 ± 0.4a 91.2 ± 0.9a 99.0 ± 0.5a 88.6 ± 6.9a
F values   13.0 9.7 6.2 0.5
P   < 0.001 < 0.001 0.001 0.9
  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 = 14.3 to 19.3 nymphs/leaf
  2. *Values represent means of 3 replicates