An Asian Journal of Soil Science

K. R. Ashoka ¹, T. H. Hanumantharaju ², Atheefa Munawery ², Chakpram Birendrajit ², D. K. Sandeep Kumar ², M. Manjunath ³

Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
3 Department of Sericulture, College of Agriculture, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN

Abstract

A laboratory experiment was conducted to study the persistence and degradation of propineb in soils from Malur and Hassan (sandy clay loamy) at 25 and 50 μg g^-1 with field capacity and half-field capacity moisture regimes. The degradation pattern followed the first order kinetics. Degradation of propineb was faster under field capacity than half-field capacity moisture regimes at both rates in both the soils. Higher degradation was noticed in Malur soil than Hassan soil at both the rates of application and moisture regimes. The half-life values ranged from 6.5 to 7.1 days for Malur soil and 6.9 to 7.1 days for Hassan soil when applied at 25 and 50 μg g^-1 of propineb under field capacity. Under half-field capacity the half-life ranged from 7.1 to 7.9 days for Malur soil and 9.1 and 9.8 days when applied at 25 and 50 μg g^-1 of propineb, respectively.

Keywords

Persistence, Degradation, Propineb, Sandy Clay Loam.

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K. R. Ashoka ¹, T. H. Hanumantharaju ¹, M. B. Mahendra Kumar ¹, Chakpram Birendrajit ¹, Atheefa Munawery ¹, P. Veeranagappa ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN

Abstract

A season study (December 2008 to march 2009) was undertaken with potato crop and was found that propineb residue degraded faster in potato under field condition when applied at 1400 and 2800 g a.i ha^-1. However, the propineb was noticed in soil on the day of propineb spray. Degradation was faster at lower dose of than higher dose of application with the half-life values of 2.3 and 2.5 days. The safe waiting period of 3.3 and 4.3 days was recommended for potato when applied at 1400 and 2800 g a.i ha^-1 of propineb.

Keywords

Propineb, Potato, Degradation, Bisdithiocarbamate.

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