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Field dissipation of the pyrethroid insecticide/acaricide biphenthrin on the foliage of peach trees, in the peel and pulp of peaches, and in tomatoes
Author(s) -
PAPADOPOULOUMOURKIDOU E.,
KOTOPOULOU A.,
STYLIANIDISM D.
Publication year - 1989
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1989.tb06560.x
Subject(s) - horticulture , biology , maximum residue limit , acaricide , eucalyptus , pulp (tooth) , fruit tree , residue (chemistry) , pesticide residue , pesticide , botany , agronomy , toxicology , medicine , biochemistry , pathology
Summary Biphenthrin was applied in the field to peach trees and tomato plants at rates of 2 and 4 g of biphenthrin a.i., 100 e.c. Talstar (Anon., 1983; FMC, USA)/100 litres of water. During the experimental period, three to four applications were made to peach trees and four to tomato plants at 14‐day intervals. Samples from peach foliage, peaches and tomatoes were collected at set post‐application dates and analysed for biphenthrin residues by GLC. The foliar residues of biphenthrin ranged from 65±1 (maximum to 25± 1 (minimum) ng/cm 2 and from 101±52 (maximum) to 35±7 (minimum) ng/cm 2 at the low and high rates of application, respectively. The residues of biphenthrin in the peach fruit peel ranged from 1016±367 (maximum) to 247±44 (minimum) ng/g for the low rate and from 2845 (maximum) to 368±15 (minimum) ng/g for the high rate of application. The maximum amount of biphenthrin residues measured in the peach pulp was 47±10 ng/g while at 21‐day after the third application and at 7‐day after the fourth application the residues present were at levels lower than the detection limit (1 ng/g) for the method applied. In whole tomatoes the residues of biphenthrin ranged from 119±14 (maximum) to 31±2 (minimum) ng/g. Plots of 1nC versus t, where C is the amount of biphenthrin ng/cm 2 of peach leaf surface or per gram of fruit tissues and t is the post‐application time in days, were constructed and the persistence half‐lives of biphenthrin were calculated.