Journal of Biological Control

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Influence of Storage Conditions on Viability and Infectivity of talc based WP Formulation of Beauveria bassiana Against Rice Hispa, Dicladispa armigera (Olivier)


Affiliations
1 Department of Entomology, India
2 Department of Plant Pathology, Assam Agricultural University (AAU), Jorhat 785 013, Assam, India
3 Department of Life Sciences, Dibrugarh University, Dibrugarh, India
4 Krishi Vigyan Kendra, Bongaigaon, Assam Agricultural University (AAU), Jorhat 785 013, India
 

Shelf life of talc based wettable powder formulation of Beauveria bassiana (Bals.) Vuill. was evaluated at room temperature (24±1°C), refrigerated condition (4°C) and in deep freeze condition (–4°C to –6°C). At room temperature, viability of conidia lasted up to 180 days with 20.22×107 conidia/gm, having 48% pathogenicity, whereas under refrigeration the same lasted for 210 days having the same conidial density but with 69.45% pathogenicity; under deep refrigeration, though viability lasted for 300 days with same conidial load, but substantially reduced pathogenicity to 20%.

Keywords

Beauveria bassiana, Shelf Life, Wettable Powder, Formulation, Pathogenicity.
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  • Influence of Storage Conditions on Viability and Infectivity of talc based WP Formulation of Beauveria bassiana Against Rice Hispa, Dicladispa armigera (Olivier)

Abstract Views: 294  |  PDF Views: 157

Authors

Purnima Das
Department of Entomology, India
L. K. Hazarika
, India
D. Bora
Department of Plant Pathology, Assam Agricultural University (AAU), Jorhat 785 013, Assam, India
K. C. Puzari
Department of Life Sciences, Dibrugarh University, Dibrugarh, India
Surajit Kalita
Krishi Vigyan Kendra, Bongaigaon, Assam Agricultural University (AAU), Jorhat 785 013, India

Abstract


Shelf life of talc based wettable powder formulation of Beauveria bassiana (Bals.) Vuill. was evaluated at room temperature (24±1°C), refrigerated condition (4°C) and in deep freeze condition (–4°C to –6°C). At room temperature, viability of conidia lasted up to 180 days with 20.22×107 conidia/gm, having 48% pathogenicity, whereas under refrigeration the same lasted for 210 days having the same conidial density but with 69.45% pathogenicity; under deep refrigeration, though viability lasted for 300 days with same conidial load, but substantially reduced pathogenicity to 20%.

Keywords


Beauveria bassiana, Shelf Life, Wettable Powder, Formulation, Pathogenicity.

References