Study the persistence of pesticides under certain different environmental condition and evolution of their impurities

الملخص EN

The present work was carried out to study the effect of storage under high temperature pesticides of naserzol ( Propiconazole 25 % EC W/V ), nofostar (Dimethomorph 5%WDG W/W), self (Fludioxonil 25 %WG W/W ) butox (Deltamethrin 50 % W/v EC ), lamba pawer (Lambda- cyhalothrain 10 % W/v Sc ) and teknofos (Cholrpyrifos 45 % W/v EC).The stability of active ingredient of the tested pesticides under storage 54 oC for 14 days and influence direct sunlight were studied .

The active ingredient were propiconazole, dimethomorph and fludioxonil 25.31, 5.03 and 10.21 before storage for propiconazole, dimethomorph and fludioxonil, respectively and become after storage 54 oC 18.65 , 4.67 and 7.68 at the end experiment .The loose percentages were 26.31, 7.15 and 24.77 % when the pesticides compound previously were stored at 54 oC for 14 days.

Also, the stability active ingredient before influence sunlight 25.07 , 5.03 and 10.21 after influence sunlight 22.01, 4.10 and 9.11 %, respectively .

Stability of active ingredient were deltamethrin, lambada-cyhalothrin and cholrpyrifos 50.45 ,10.23 and 45.03 before storage become after storage 54 oC 25.50 , 4.92 and 45.03 at the end experiment.

The loose percentage were 49.45 , 51.91and 22.71%, respectively, were stored at 54 oC for 14 days .

Deltamethrin impurities' before and after influence storage 54 oC for 14 days indictable but cholrpyrifos impurity of sulfotep (O,O,O’,O’-tetraethyl dithiopyrophosphate ) become storage 54 oC for 14 days 5.098 mg/kg.