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


Affiliations

  • Department of Entomology, India
  • Assam Agricultural University, Department of Plant Pathology, India
  • Assam Agricultural University, Department of Plant Pathology, Jorhat, Assam, 785 013, India
  • Dibrugarh University, Department of Life Sciences, Dibrugarh, India
  • Assam Agricultural University, 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.

Subject Discipline

Entomology

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