Rational Insecticides Against Tuta Absoluta in Relation to Pesticides Residue on Tomatoes

Document Type : Original Article

Authors

1 Faculty of Agriculture, Saba Bash, Plant Protection Department, Alexandria University.

2 Central Laboratory of Residue Analysis of Pesticides and Heavy Metals in Food (QCAP), Agricultural Research, Giza.

3 Plant Protection Research Institute. Agricultural Research Center, Giza.

4 Faculty of Agriculture, Plant Protection Department. Alexandria University.

Abstract

An Evaluation for certain Agricultural candidates against Tuta absoluta on Tomatoes was carried out during two seasons. The determination of the pesticide residues was, also carried out during the course of the study. The obtained results indicated that the traditional insecticides rating in the following order; Voliam flexi (Thiamethoxam
+ Chlorantraniliprole), Avaunt (Indoxacarb) and Coragen (Chlorantraniliprole), are more effective than Bio- insecticides; Proclaim (Emamectin benzoate) followed by Dipel (Bacillus thuringensis var korstaki) and then Achook (Azadirachtin), respectively.
Under open field conditions, the investigation on residual limits and dissipation behavior of some tested insecticides was conducted after the last application. Extraction was carried out using a quick, easy, cheap, effective, rugged, and safe (QuEChERS) method for multiclass, multiresidue analysis of pesticides in a variety of matrices. Meanwhile residue determination was performed using Liquid chromatography tandem mass spectrometry (LC.MS.MS). Recoveries were within acceptable levels. Dissipation rates followed the first order kinetics and half-life values for tested insecticides were ranged from 2.3 to 4.53 days and one day for bio- insecticides. According to the Maximum Residue Limits (MRLs) of European Union, the calculated Pre Harvest Intervals (PHIs) of ranged between 2.9 and 8 days for traditional insecticides and between 2.09 and 4.3 days for bio-insecticides.
 

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Alexandria Science Exchange Journal
Volume 43, Issue 3 - Serial Number 3
JULY-SEPTEMBER
September 2022
Pages 391-398

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