اعلانات هامة

This study was carried out in four locations of Homs region - Syria during the 2010 to conduct the primary record of tomato leafminer, Tuta absoluta (Povolny), monitor the seasonal activity of the population tomato leafminer, by using sex pheromone traps. The activity of tomato leafminer was recorded in the fourth week of June and began to infect tomatoes and continued to increase until it reached the following levels: The first peak occurred at the first week of July (750 and 764 male moths/ trap/week) for the Research Center and Sheen location respectively, and the second peak occurred at the fourth week of July (620 and 490 male moths/trap/week) for the Research Center and Sheen location, respectively. However, late plantation of tomatoes at locations of Jucia-Alkharap and Al-Mekhtaria had witnessed an active period which started at the second and third week of July and gradually reached the highest population at the first and second week of August at an average of (680 and 1180 male moths/trap/week) at Jucia- Alkharap and Al-Mekhtaria locations respectively. 

The results showed that the activity of field generations, which were obtained during the 2010 season on tomatoes, were represented in two generation; the first generation started from the fourth week of June to the third week of July with a duration of 5 weeks and the second generation started from the third week of July to the third week of August with a duration of 5 weeks. The obtained results revealed that infection of tomato leafminer during 2010 season was from 31.55 to 52.62% at the first week of August, while the percentage of apparent damage reached for this season from 11.80 to 24.88%. 

Three plant extracts were valuated against tomato leafminer. Results showed that Melia azedarach L. extract gave the highest efficiency 84.48% followed by Allium sativum L. 71.98% and Capsicum annumm L. 61.54%. Efficiency increased gradually by increasing the period of exposure after treatment for plant extracts from 15.40% after one day to 84.48% after 10 days for M. azedarach, as well as to A. sativum extract from 28.99 to 71.98% while the C. annumm extract increased from 28.13 to 61.54 %. 

Key words: Tomato Leafminer, Tuta absoluta, Seasonal activity, Plant extracts.

أجريت هذه الدراسة في أربعة مواقع من منطقة حمص – سورية  خلال موسم 2010 بهدف التسجيل الأولي لحافرة أوراق البندورة  Tuta absoluta  Povolny ورصد النشاط الموسمي لمجموع فراشات حافرة أوراق البندورة باستخدام المصائد الجنسية الجاذبة. ابتدأ نشاط الحشرة في نهاية شهر حزيران وبدأت الإصابة على محصول البندورة واستمرت الإصابة بالارتفاع حتى وصلت إلى تشكيل القمة الأولى في الأسبوع الأول من تموز بمتوسط  تعداد (750 و 764 ذكر فراشة/مصيدة/أسبوع) لموقعي مركز البحوث وشين  على التوالي. والقمة الثانية في الأسبوع الرابع من تموز بمتوسط تعداد