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Register a new userSurvey of parasitic and nonparasitic nematodes associated with maize roots at Kharabo (Damascus countryside) and AL-Mraieh (Deir Al-zowr) locations
تقصي النيماتودا (الديدان الخيطية) المتطفلة و غير المتطفلة المرافقة لجذور الذرة في منطقتي خرابو (ريف دمشق) و المريعية (ديرالزور)
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تم تقصي أجناس النيماتودا (الديدان الخيطية) المرافقة لمحصول الذرة، خلال المدة بين شهري آب و تشرين الأول لعام 2003 ، شملت الدراسة منطقتي محطة 1 أيار / خرابو (ريف دمشق) و محطة المريعية (دير الزور) في سورية. جمعت 36 عينة مركبة من الجذور و التربة المحيطة بها. استخلصت النيماتودا من العينات بطريقتي الغرابيل وأقماع بيرمان وفحصت مجهريًا وتم التعرف عليها وتحديد كثافتها وحساب قيمة التكرار المطلق لكل جنس منها. أظهرت نتائج المسح الحقلي لتربة نباتات الذرة وجذورها وجود 14 جنسا مًن النيماتودا (الديدان الخيطية) المتطفلة على النبات و 4 أجناس من الديدان الخيطية المتغذية على الفطور و 12 جنسا مًن النيماتودا الحرة.
Field survey was conducted to identify plant nematode genera associated with maize crop during the period August-October 2003. The study was carried out at two locations: Kharabo station (Damascus countryside) and Al-Mraieh station (Deir Al-zowr) in Syria. 36 complex samples were collected from roots and rhizosphere soil; nematodes were extracted by two methods Sieving and Baermann funnel, examined under microscope for identifi cation. Population density and absulute frequency for each genera were calculated. Results of field survey showed the presence of 14 genera of plant parasitic, 4 fungivorous, and 12 omnivorous nematodes in maize roots and rhizosphere soil .
References used
Ahmed, S. I. And Oasim, M. 1990. A survey of corn cyst nematode in North West Frontier Province and northern areas of Pakistan. International Nematology Network Newsletter: 26-27
Commenweath Institute of Helminthology (C.I.H.). 1972. Descriptions of plant parasitic nematodes. CAB International :1-90
Corbett, D. C. M. 1978. Migratory soil Tylenchida. Pages: 188-206. [in:] Technical Bulletin7 Plant nematology. (Southey,J.F.[Editor]). Third edition. Her Majesty’ s Stationery Office. London
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A survey was conducted to determine the frequency and mean densities of
plant-parasitic nematodes associated with cotton crop (Gossypium hirsutum L.)
after the harvesting season 2008 in Syria. Results showed that twelve genera of
plant-parasitic n
ematodes were found associated with cotton crop roots. The
distribution of nematode genera varied between the Syrian governorates,
Pratylenchus spp., Meloidogyne spp. and Rotylenchulus infect most cotton fields
in all syrian governorates. The distribution was relatively uniform between the
governorates. They occurred in 80.7%, 46.6% and 32.95%, respectively, of
tested fields with an average density of 137.2, 59.6 and 574.3 juveniles/100 cm3
soil, respectively. meanwhile, the genus Tylenchorhynchus was found in central
region only. Rotylenchulus was more prevalent in the heavier soils, but
Meloidogyne. was not influenced by soil type. The other nematode genera
detected in this survey were less frequent, their frequency of occurrence were
for Hoplolaimus (19.3%), Scutellonema (31.8%), Tylenchorhynchus (31.8%),
Helicotylenchus (30.7%), Rotylenchus (36.4%), Tylenchus (18.2%), Xiphinema
(3.4%).
A study was conducted to investigate the presence of root knot nematode
(RKN) and other plant parasitic nematodes associated with Syrian most
important peach plantation areas. 126 soil and root samples were taken from
63 peach orchards of Ghuta, Z
abadani, Yabrod, Syrghaya and Kharabo at
Damascus governorate, and Tezeen, Kufr Ton, Khattab, Arzeh, Sheha,
Qamhaneh, Balhasen, Rastan, Mhardeh, Salmieh, Sqalbieh and Sharaya at
Hama governorate.
This study, which is the first one in our country is concerned with isolation
and distribution of predatory fungi in Damascus district. The study was carried
out within three years. Six species of fungi from (١٠٢) isolates near four
different tree
s had been identified. Arthrobotrys oligospora is the most
widespread, Verticillium sp. is the less spread one. Two species of Dactylella and
Dactylaria were poor distributed.
The investigation aimed to survey the thistle of genus Carduus
spp in its habitat in Alswayda and Damascus countryside and
associated plants, by visiting these areas through flowering seasons
of Carduus spp during 2013- 2015.
Monthly population fluctuations of plant parasitic nematode population
associated with root of cotton in central province fields in Syria were studied
over a 2-year period 2008-2009. In both years, the differences between monthly
samples were not
significant. Average of nematode population density in soil
decreased after sowing (May) and near the end of the season (at harvest) in
both years and in all of the central province fields, then the numbers of
nematode increased slowly again in June to reach a peak at mid-season (July).
Ghab region had the higher population density (1180.8 juveniles/100cm3 soil).
An increase in numbers of nematode in soil was accompanied with a decrease
in number in roots. Negative correlation was observed between average of the
initial population density and reproduction factor. Pratylenchus, Meloidogyne
incognita, Rotylenchulus, Tylenchorhynchus were dominant nematode species
in these fields. Also, the infestation of the first three nematode species was not
uniform.
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