Author(s):

Patil CS, SA Landge, BV Deore and YS Saindane

Abstract: Field experiment was conducted during Kharif, 2016 at University Farm, MPKV, Rahuri, Dist.- Ahmednagar to determine the residues and dissipation of monocrotophos in/on brinjal and cropped soil. Two sprays of monocrotophos 36 SL were given at an interval of 10 days initiating first spray at fruit formation stage @ 250 g a. i./ha (625 ml/ha) and 500 g a. i./ha (1250 ml/ha). Samples of brinjal fruits were collected periodically at 0, 1, 3, 5, 7, 10 and 15 days after second spray. The cropped soil samples were collected at harvest. Collected samples were analyzed for Monocrotophos residues by using validated QuEChERS method on Gas Chromatography. The results revealed that average initial residues of monocrotophos in brinjal fruits were found to be 0.38 mg/kg at recommended and 0.75 mg/kg at double recommended dose and reached BQL (<0.05 mg/kg) on 10^th and 15^th day at both the doses, respectively. No residues were detected in the untreated control samples. The half life values (DT₅₀) were found to be 2.75 and 3.01 days, for recommended and double recommended dose, respectively. Soil samples collected at harvest did not recorded the residues of monocrotophos.

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