Author(s): S. MAJUMDER, B. GHOSH, S. ROY AND A. BHATTACHARYYA

Abstract: A one season supervised multi location field trial of Hexythiazox on brinjal was conducted under Indian climatic condition. The Hexythiazox formulation (Maiden 5.45 EC) was applied @ 25 ga.i. ha-1 and 50 g a.i ha-1 along with untreated control. The samples were extracted and cleaned up using modified QuEChERS method and quantified by GC-ECD. The LOD & LOQ of Hexythiazox was 0.01 ug–1g and 0.03 ug–1g respectively. The average recovery of Hexythiazox was found in the range of 84-92 % for brinjal fruit and 86-90% for field soil. Dissipation of Hexythiazox followed first order kinetics and the half life values of Hexythiazox were in the range of 1.42 to 2.32 days. No residue was detected in field soil. The pre harvest interval of Hexythiazox in brinjal was calculated and found in the range of 3-5 days irrespective of dose and location.

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