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Evaluation of Beauveria bassiana (Balsamo) Vuillemin against Coriander Aphid, Hyadaphis coriandri (Das) (Aphididae: Homoptera)


Affiliations
1 Department of Entomology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India
 

Laboratory bioassays were carried with seven different concentrations of Beauveria bassiana against Hyadaphis coriandri by using detached leaf bioassay technique with slight modifications. The mortality in treated aphids increased in conidial spore concentration. The highest concentration (1x1010 conidia ml-1) caused maximum cumulative mortality (96.85%) at 7 days after treatment compared to the lowest concentration (1×104 conidia ml-1) with 67.61 per cent mortality. The median lethal concentration (LC50) value recorded with B. bassiana was 1.5x104 conidia ml-1 in mixed H. coriandri population. Median lethal time (LT50) values were found to be inversely proportional to the spore concentration of B. bassiana and were observed as 45.70, 67.60, 71.30, 87.04, 97.72, 120.26 and 141.57 h for 1010, 109, 108, 107, 106, 105, 104 conidia ml-1, respectively.

Keywords

Hyadaphis coriandri, Beauveria bassiana, Bioassay, LC50, Pathogenicity and LT50.
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  • Evaluation of Beauveria bassiana (Balsamo) Vuillemin against Coriander Aphid, Hyadaphis coriandri (Das) (Aphididae: Homoptera)

Abstract Views: 298  |  PDF Views: 209

Authors

K. Selvaraj
Department of Entomology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India
H. D. Kaushik
Department of Entomology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India
Rachna Gulati
Department of Entomology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India

Abstract


Laboratory bioassays were carried with seven different concentrations of Beauveria bassiana against Hyadaphis coriandri by using detached leaf bioassay technique with slight modifications. The mortality in treated aphids increased in conidial spore concentration. The highest concentration (1x1010 conidia ml-1) caused maximum cumulative mortality (96.85%) at 7 days after treatment compared to the lowest concentration (1×104 conidia ml-1) with 67.61 per cent mortality. The median lethal concentration (LC50) value recorded with B. bassiana was 1.5x104 conidia ml-1 in mixed H. coriandri population. Median lethal time (LT50) values were found to be inversely proportional to the spore concentration of B. bassiana and were observed as 45.70, 67.60, 71.30, 87.04, 97.72, 120.26 and 141.57 h for 1010, 109, 108, 107, 106, 105, 104 conidia ml-1, respectively.

Keywords


Hyadaphis coriandri, Beauveria bassiana, Bioassay, LC50, Pathogenicity and LT50.

References