مدى انتشار و فعالية ذبابة الهالوك (Phytomyza orobanchia Kalt.)‎ على الهالوك المتفرع (Orobanche ramosa L.)‎ في حقول البندورة الطماطم على الساحل السوري

الملخص EN

A field survey was carried out in tomato (Lycopersicum esculentum Mill.) fields infested with branched broomrape (Orobanche ramosa L.) along the Syrian coast to study the distribution and the effect of the agromyzid fly Phytomyza orobanchia Kalt.

on this parasitic weed.

Branched broomrape samples were randomly collected from infested fields, and inspected in the laboratory to determine the rate of infestation with P.

orobanchia and evaluate the effect of this infestation on seeds number and capsules weight.

Results showed that P.

orobanchia was distributed naturally in these fields, and the larvae fed efficiently on the seeds inside capsules.

Broomrape infestation with P.

orobanchia varied from one field to another and reached up to 79.5%.

Larvae feeding caused significant reduction in the fresh weight of infested capsules compared with un-infested ones.

Seeds number in infested capsules was reduced by 86.2%.

These results suggest the high potential of using P.

orobanchia in the biological control of O.

ramosa.