Dissipation of Acetamiprid Residues in Okra Fruits and Red Soil of West Bengal
Mukhopadhyay Soumi, Biswas PK*
Department of Soil Science and Agricultural Chemistry, Institute of Agriculture, Visva-Bharati, Sriniketan, 731 236, Birbhum, West Bengal, India
*Corresponding author E-mail: firstname.lastname@example.orgemail@example.com
Online published on 8 January, 2020.
The residual fate and dissipation pattern of acetamiprid 20 per cent SP on okra fruits and soil in red and lateritic belt of the Indian sub-continent are reported. The insecticide was applied at the recommended (T1) 15 g a.i. ha−1 and double the recommended (T2) 30 g a.i. ha−1 doses along with an untreated control (T3) for two consecutive seasons (Rabi 2015–16 and Rabi 2016–17). The field cropped soil and fruits were collected at different time intervals. The half-life values were found in the range of 14.76 to 23.34 d in okra cropped soil and 0.87 to 1.46 d in okra fruits, irrespective of the dose and season. More than 65 per cent of acetamiprid dissipated after 45 d of application on cropped soil and more than 90 per cent in fruits after 5 d of application. This insecticide could safely be recommended for application as no residues were detected after 7 d of application in okra fruits.
Acetamiprid, dissipation, half life, okra, persistence.