The residual behavior of Thiamethoxam (Actara 25% W.G) Oxycarboxin (Plantfax 20% E.C),
Chlorothalonil (Chlorothate 75% W.P) and Bifenazate (Acramite 48% S.C), in Kidney bean and Tomato fruits
under the environmental condition of Egypt was studied. The tested pesticides were sprayed at recommended
dose of 80g / fed., 100 cm3 /100 L of water, 250 g/100 L of water and, 35cm3 /100 of water for actara, plantfax,
Chlorothate and Acramite respectively on Kidney bean and Tomato plants. The treated kidney bean and tomato
were randomly sampled in triplicates after one hour, 1, 3,7,10 and 15 days period after pesticides application.
Samples were extracted, clean up and analyzed using HPLC and GC/ ECD. The half - life values were calculated
to be 4.14, 1.09, 0.84 and 2.63 days for Actara, Plantfax, Chlorothate and Acramite respectively. The pre - harvest
interval (PHI) was determined to be 1, 3,7,10 and 15 days for kidney bean with actara and plantfax and tomato
with chlorothate and acramite under prevailed local field conditions respectively. Results showed that waiting
for the recommended pre - harvest intervals, indicated on the prospectuses of both pesticides, lowered the
residue levels to within acceptable limits. |
