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Hexythiazox Analysis

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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 g a.i./ha and 50 g a.i./ha 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/g & 0.03 ug/g 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 …show more content…

(ii) Rahuri, Maharashtra (iii) MPKV, Jabbalpur, Madhya Pradesh and (iv) G.B.Pant Univ. of Ag & Tech., Krishi Vigyan Kendra, Dhakarni, Dehradun, Uttarakhand. Hexythiazox (Maiden 5.45% EC) was applied in the field at fruiting stage of brinjal at two different doses viz, recommended dose (T1) i.e. 25 g a.i./ha and double the recommended dose (T2) i.e. 50 g a.i./ha and a control where no pesticide was applied. Two treatment doses of the pesticide along with a control were replicated thrice in a randomized block design (RBD). Spraying was done with High volume Knapsack sprayer (Sampling Volume 500 L/ha) fitted with Hollow cone …show more content…

The initial deposit of Hexythiazox in brinjal fruit were found in the range of 0.23 to 1.18 ug/g for recommended dose (T1) and 0.42 to 2.30 ug/g for double (T2) doses irrespective of location. Around 60% of initial residue was dissipated by 3rd day irrespective of dose and location. The residue of Hexythiazox was below the quantification level (0.03 ug/g) at 7th day for both doses. The dissipation pattern of Hexythiazox in brinjal followed first order kinetics for all locations. The T1/2 of Hexythiazox was calculated using Hoskins formula (Hoskins1961). The residual half life values were found to be in the range of 1.42 to 2.13 for recommended dose (T1) and 1.84 to 2.47 days for double the recommended dose (T2) respectively for all four locations. The soil sample was collected on 10th day after the application of the chemical. Hexythiazox residue was found below quantification level (0.03 ug/ml) in soil for all the four locations. Abd-Alrahman SH (2012) in a trial of Hexythiazox in bean-pods found that the initial deposit of Hexythiazox was 0.76 ug/g and the half life value of Hexythiazox 2.70 days. Thus the results of the current experiment qualify the previous

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