تحديد الأثر المتبقي لمبيد ألفاسايبرمثرين في ثمار البندورة الطماطم

الملخص EN

This study was carried out at AL-Meraia Research Station in Deir-Ezzor in 2009 to determine pesticide residue, safety period and half life of alpha cypermethrin in Tomato fruits.

Tomato fruits were sprayed with alpha cypermethrin 10% EC at the recommended rate (20 ml/20 liters water).

Samples were collected immediately after spraying and subsequently at 1, 2, 3, 4, 5, 7, 9 and 14 days after spraying, and analyzed using high performance liquid chromatography (HPLC) device using ultra violet(UV) detector at 206 nm.

Results showed that initial residue of alpha cypermethrin in tomato fruits was 0.668 mg/kg two hours post treatment and then decreased to 0.337 mg/kg after 9 days, and the residues reached undetectable levels at 14 days after spraying.

The calculated half life was 1.85 days and the safety period for alpha cypermethrin on tomato was 4.49 days, whereas the recommended safety period by the manufacturer is 7 days.