التركيب الكيميائي للزيت الأساسي لنباتات الزعتر السوري syriacus Thymus و فاعلية المستخلص على خصوبة و تشوه حشرة ذبابة ثمار الزيتون

Abstract EN

These investigations were carried out in 2019-2020, attheDepartment of Plant Protection-Damascus University, the Faculty of Agriculture, Damascus University.

In the present work, chemical composition of essential oil of Zattar(Thymus syriacus Boiss: Lamiaceae) from the mountainof RuralDamascus –SyriaIt was determined by Chromatography-Mass Spectrometry GC/MS.

T.

syriacusleaves at vegetative stage oil was isolated by hydrodistillation.

The 11 components were identified in T.

syriacus oil and the main components wereas follows; (9.32%), Thymol (42.30%),and Carvacrol (8.70%).

In Addition,this study investigated the potential of ethanol extract of T.

syriacusleaves to control the olive fruit fly.

Freshly emerged female and male adults of Bactroceraoleae(Gmel) ( Diptera,Tephritidae(were continuously fed for 12 days on diet containing125,250,500,750, 1000, 1250 and ppm of ethanol extract of T.

syriacus leavesseparately in laboratory cages.

The extract caused 71.83, 80.08 and 93.85 % mortality at 1500 ppm after 3, 6 and 12 days of treatment, respectively.

The surviving adults flieswere mated and allowed to reproduce on clean olive fruits in separate cages.

The inhibition in pupal progeny was 52.32, 68.85 and 73.49 % in the flies fedon 250, 500 and 1000 ppm, the inhibition observed in adult progeny was69.33, 76.67 and 85.33%, respectively.