Persistence of propargite on okra under subtropical conditions at Ludhiana, Punjab, India.

B K Kang, Gagan Jyot, R K Sharma, R S Battu, B Singh

Index: Bull. Environ. Contam. Toxicol. 85(4) , 414-8, (2010)

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Abstract

Residues of propargite were estimated in okra fruits by high performance liquid chromatography following single application of Omite 57 EC @570 and 1,140 g a.i./ha. Residues of propargite were confirmed by high performance thin layer chromatography. The average initial deposits of propargite were observed to be 1.36 and 3.32 mg/kg, respectively, which were below its maximum residue limit of 2 mg/kg. The residue levels of propargite dissipated below its limit of quantification of 0.02 mg/kg after 7 days at single dose and after 10 days at double dose. The half-life values (T ₁(/)₂) of propargite were worked out to be 0.79 and 0.73 days, respectively, at recommended and double the recommended dosages.