نُفذ هذا البحث في بساتين الحمضيات التابعة لمنطقة اسطامو بمحافظة اللاذقية خلال عامي 2014-2015. بيّنت نتائج الدراسة أن للحشرة القشرية السوداء جيلاً واحداً في السنة مع وجود جيل ثاني جزئي خلال فصل الصيف. تقضي الحشرة البيات الشتوي بطور الحورية في العمر الثاني و هو الطور الأكثر قدرة على تحمل الحرارة المنخفضة في فصل الشتاء. تعود الحورية بالعمر الثاني للنشاط في بداية فصل الربيع لتكمل دورة حياتها حيث تظهر الاناث الفتية في وقت مبكر من شهر نيسان على كل من الأفرع و الأوراق، لتظهر الإناث البالغة مع بداية شهر أيار و يبدأ فقس البيض في منتصف هذا الشهر و يستمر حتى شهر تموز. تبيّن من الدراسة أن طور الحورية بالعمر الثاني هو الطور الأكثر تواجداً خلال الموسم على كل من الأفرع و الأوراق. لوحظ موت أعداد كبيرة من الحشرة في طوري الحورية بالعمر الثالث و طور الأنثى الفتية و التي تطورت خلال الموسم نفسه، كما أظهرت دراسة توزع و انتشار الأطوار المختلفة للحشرة على الأجزاء النباتية أن الأفرع كانت أكثر إصابة من الأوراق مع تفوق معنوي في الكثافة العددية لتواجد طور الحورية و الطور البالغ على الأفرع مقارنة مع الأوراق.
This research carried out in the orchards of the Stamo area province of Lattakia citrus
during the years 2014-2015, and the results of the study showed that the insect black
cortical one generation per year with a second partial generation during the summer. Under
the insect overwintering nymph stage in the second age is the most able to withstand the
low-temperature phase in the winter. Mermaid back age-second activity in the beginning of
spring to complete their life cycle where the female young appear in early April on each of
the branches and leaves, to show adult females with the beginning of the month of May
and starts the eggs to hatch in the middle of this month and will continue until the month of
July. The study found that the nymph stage second phase age is the most common during
the season at each of the branches and leaves. Observed the death of large numbers of the
insect in the phasic nymph third age and female fledgling stage, which evolved during the
same season, as the study of the distribution and the spread of the different phases of the
insect on the plant parts showed that the branches were more injury than securities with
higher than moral in the population density of the presence of eccentric nymph and adult
stages the branches compared with the leaves.
References used
ANNECKE, D.P. AND M.J. MYNHARDT. The species of the insidiosus group of Metaphycus Mercet in South Africa with notes on some extralimital species (Hymenoptera: Encyrtidae). Revue de Zoologie et de Botanique Africaines. 1972. 85: 227- 74
ARGYRIOU, L. Studies on the morphology and biology of the black scale (Saissetia oleae (Bernard)) in Greece. Annales de l’Institut Phytopathologique Benaki n.s. 1963. 5:353-377
BA HAMED, M.T. AND M. CHEMSEDDINE. Selective toxicity of some pesticides to Pullus mediterraneas Fabr. (Coleoptera: Coccinellidae), a predator of Saissetia oleae Bern. (Homoptera: Coccoideae). Agricultural and Forest Entomology 2002. 4 (3): 173-178
The research was conducted during the period between May 2014 and May 2015. The field work was carried out in the Astamo area of Lattakia within an orchard planted with citrus and olives in the form of single and adjacent sectors for each
This research was conducted in laboratory of Nematology in the Center of Scientific
Agricultural Research in Lattakia, to detection of Entomopathogenic Nematodes (EPNs) in
Citrus Orchards soils in Lattakia governorate.
A total of 66 composite soil
A survey of infection by Citrus tristeza virus (CTV) was conducted during a visit to 14 citrus orchards in different regions in Tartous governorate in the Syrian Coast during the spring of 2012. We collected a total of /691/ samples of different vari
This research aims to achieve production costs for all agriculture crop eggplant
operations account, and analysis, and the calculation of economic returns, has been
conducting the study based on 2015 prices, compared with 2010 prices, where prices
Verticillium wilt is one of the most serious disease that affect olive trees, and it is
spread all over the world where the olive trees grown. It is caused by the soil – borne
fungiVerticilliumdahliaekleb. Whichhas a wide host range, and forms amic