AEROBIOLOGICAL INVESTIGATIONS OVER JOWAR CROP FIELD AT RAHURI
Keywords:
Aerobiocomponents, Air sampling, diseases, Meteorology.Abstract
Aerobiological investigations have been carried out at Rahuri for four consecutive seasons over Jowar crop. Tilak volumetric air sampler was used to estimate different aerobiocomponents both qualitatively and quantitatively with respect to meteorological parameters. Analysis of airspora after air sampling revealed 63 spore types including 34 from Deuteromycotina, 18 from Ascomycotina, 4 from Basidiomycotina, 2 from Phycomycotina and 5 other types. Percentage contribution of these spore groups to the total airspora revealed that, Deuteromycotina (60.37%) as a dominant group followed by Ascomycotina (18.96%), Basidiomycotina (16.63%), other types (2.54%) and Phycomycotina (1.5%). Average percentage contribution of each spore type to the total airspora of four consecutive seasons reavealed that Cladosporium (15.44%) as a dominant type followed by Curvularia (7.65%), Alternaria (7.32%), Smut spores (6.49%), Cercospora (4.94%), Helminthosporium (4.13%) etc. Pathogenic spore types like Rust, Smut, Alternaria, Curvularia and Helminthosporium have been observed in sufficiently higher concentrations followed by respective disease incidence. Seasonal variations and diurnal periodicity studies revealed typical rhythm and pattern of spore incidence.
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