title: Dissipation pattern of flubendiamide residues on capsicum fruit (Capsicum annuum L.) under field and controlled environmental conditions.
abstract: This investigation was undertaken to compare the dissipation pattern of flubendiamide in capsicum fruits under poly-house and open field after giving spray applications at the recommended and double doses of 48 g a.i. ha(-1) and 96 g a.i. ha(-1). Extraction and purification of capsicum fruit samples were carried out by the QuEChERS method. Residues of flubendiamide and its metabolite, des-iodo flubendiamide, were analyzed by high-performance liquid chromatography-photodiode array, and confirmed by liquid chromatography-mass spectrometry/mass spectrometry. Limit of quantification of the method was 0.05 mg kg(-1), and recovery of the insecticides was in the range of 89.6-104.3%, with relative standard deviation being 4.5-11.5%. The measurement uncertainty of the analytical method was in the range of 10.7-15.7%. Initial residue deposits of flubendiamide on capsicum fruits grown under poly-house conditions were (0.977 and 1.834 mg kg(-1)) higher than that grown in the field (0.665 and 1.545 mg kg(-1)). Flubendiamide residues persisted for 15 days in field-grown and for 25 days in poly-house-grown capsicum fruits. The residues were degraded with the half-lives of 4.3-4.7 and 5.6-6.6 days in field and poly-house respectively. Des-iodo flubendiamide was not detected in capsicum fruits or soil. The residues of flubendiamide degraded to below the maximum residue limit notified by Codex Alimentarius Commission (FAO/WHO) after 1 and 6 days in open field, and 3 and 10 days in poly-house. The results of the study indicated that flubendiamide applied to capsicum under controlled environmental conditions required longer pre-harvest interval to allow its residues to dissipate to the safe level.
authors.affiliation: a Pesticide Residue Laboratory, Indian Institute of Horticultural Research , Hessaraghatta Lake PO, Bengaluru , Karnataka , India.|b Center for Postgraduate Studies (Jain University) , Jayanagar , Bengaluru , Karnataka , India.
authors.forename: Radhika
authors.initials: R
authors.lastname: Buddidathi
authors.affiliation: a Pesticide Residue Laboratory, Indian Institute of Horticultural Research , Hessaraghatta Lake PO, Bengaluru , Karnataka , India.
authors.forename: Soudamini
authors.initials: S
authors.lastname: Mohapatra
authors.affiliation: a Pesticide Residue Laboratory, Indian Institute of Horticultural Research , Hessaraghatta Lake PO, Bengaluru , Karnataka , India.
authors.forename: Lekha
authors.initials: L
authors.lastname: Siddamallaiah
authors.affiliation: a Pesticide Residue Laboratory, Indian Institute of Horticultural Research , Hessaraghatta Lake PO, Bengaluru , Karnataka , India.
authors.forename: Gourishankar
authors.initials: G
authors.lastname: Manikrao
authors.affiliation: c Division of Vegetable Crops, Indian Institute of Horticultural Research , Hessaraghatta Lake PO, Bengaluru , Karnataka , India.
authors.forename: Shibara Shankara
authors.initials: SS
authors.lastname: Hebbar
mesh_terms: D001549:Benzamides / Q000032:analysis*; D002212:Capsicum / Q000254:growth & development; D004784:Environmental Monitoring; D005638:Fruit; D007194:India; D007306:Insecticides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D013450:Sulfones / Q000032:analysis*; D005466:Fluorocarbons; D010797:Phthalimides
chemical_list: D001549:Benzamides; D007306:Insecticides; D010573:Pesticide Residues; D012989:Soil Pollutants; D013450:Sulfones; C508762:flubendiamide; D005466:Fluorocarbons; D010797:Phthalimides
keywords: Capsicum; flubendiamide; half-life; open field; poly-house