Asian Journal of Bio Science

Y. V. Ingle ¹

Affiliations
1 Department of Plant Pathology, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S.), IN

Abstract

N. rileyi formulated in different carriers viz., talc, kaoline, charcol, wheat bran, soil and lignite stored at 4°C and room temperature for six months storage to assess viability and infectiveness against third instars larvae of H. armigera. All carriers retained the viability in sufficient numbers for a period of 150 days at 4°C temperature. However, after 180 days of storage significant reduction was observed in all carriers. Kaoline supported maximum propagules i.e. 14.21 x 10⁶ cfu/g followed by lignite (11.95 x 10⁶ cfu/g) after 180 days of storage at 4°C temperature. Viability was drastically reduced when carrier's formulations stored at room temperature. Kaoline formulation stored at 4°C was efficient as recorded maximum larval mortality of H. armigera at 60, 120 and 180 days followed by lignite. However, at room temperature drastic reduction in per cent larval mortality of H. armigera (ranged of 16.67 to 43.33%) was observed.

Keywords

N. rileyi, Carrier Formulations, Viability, Infectivity.

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