Influence of environmental factors on production and dispersal of Tolyposporium penicillariae sporidia

Kousik, C S and Thakur, R P and Subbarao, K V (1998) Influence of environmental factors on production and dispersal of Tolyposporium penicillariae sporidia. Indian Journal of Aerobiology, 1 (2). pp. 85-91.

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Abstract

The influence of environmental factors on production and dispersal of airborne sporidia of Tolyposporium penicillariae, the causal agent of smut of pearl millet (Pennisetum glaucum), was studied for 4 years (1984-1987) at the ICRISAT Centre farm. Sporidia were monitored once every 2 weeks, using rotorod spore samplers in two fields each cropped with pearl millet (June-October) and groundnut (November-April), located 500 m apart; one was a pearl millet smut nursery and the other was not. Most sporidia were trapped during the latter half of the pearl millet growing season, the time when the crop is at flowering and susceptible to infection. Maximum numbers of sporidia were recorded when the maximum temperature was 31-32° C and the minimum temperature was 20-21°C, and maximum relative humidity (RH) was more than 80% and minimum RH was 41-50%, with some rainfall (11-30 mm) and low wind speed (4-6 km/h), calculated on biweekly basis. Temperature, RH and wind speed were the principal environmental factors influencing production and dispersal of T. penicillariae sporidia.

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Others > Agriculture-Farming, Production, Technology, Economics
Depositing User: Library ICRISAT
Date Deposited: 17 Sep 2011 08:30
Last Modified: 17 Sep 2011 08:30
URI: http://oar.icrisat.org/id/eprint/1723
Official URL:
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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