نتایج جستجو برای: decline
تعداد نتایج: 91073 فیلتر نتایج به سال:
Insect pollination is important for food production globally and apples are one of the major fruit crops which are reliant on this ecosystem service. It is fundamentally important that the full range of benefits of insect pollination to crop production are understood, if the costs of interventions aiming to enhance pollination are to be compared against the costs of the interventions themselves...
Primary immunodeficiency diseases (PID) result from defects in genes affecting the immune and other systems in many and varied ways (1, 2). Until the last few years, treatments have been largely supportive, with the exception of bone marrow transplantation. However, recent advances in immunobiology, genetics, and the explosion of discovery and commercialization of biologic modifiers have drasti...
The historical city of Tawwaj, in the northern hinterland of the Persian Gulf, has long been one of Iran's most recognized cities. The boom of this city was during the period of Buyids, but then it quickly deteriorated. There is now nothing left of this town except a name in ancient texts and even the ruins of the city are unknown. This article examines the birth and continuity of this city and...
Oak decline is an eminent factor, which has a significant role in degradation and change in Zagros forests. The goal of present study was to assess the crown surface area of oak trees in Sarableh forests, Ilam province. For this purpose, permanent sample plots were used. Eighty sample plots with 10 Ar area were applied based on systematic-random method in a 150×200 survey network in 120 ha. The...
In this study, all the papers about oak decline phenomena in forests of Iran have been reviewed. One hundred and twelve papers from 51 journals were reviewed, and the information presented in each paper was analyzed and finally summarized. Eighty seven percent of the papers were about Brant’s oak (Quercus brantii Lindl.). Most of the studies were focused on the pest and desease of oak decline. ...
during 2004–2007 various own rooted vineyards were inspected to study the fungi associated with vine trunk diseases in iran. samples from declining vines showing yellowing and reduced growth and different symptoms in wood, including browning of the wood, necrosis, brown and black streaking and white rot were collected. fungal isolations were made from affected tissues onto malt extract agar (me...
petri disease is responsible for grapevine decline and occurs wherever grapevines (vitis vinifera) are cultivated. phaeoacremonium species are among the principal hyphomycetes associated with petri disease. during 2009, a field survey was conducted throughout different vineyards in the fars province of iran in order to determine the fungal pathogens associated with the vine decline observed in ...
Determination of soil chemical properties variability that affected tree tolerance to stresses can help to manage this environmental phenomenon. In this investigation, for detection of this variation trend, area of affected decline oak trees divided to four groups of control (without Oak decline), slight, middle and severe Oak decline based on tree and branch number per soil surface unit. In ea...
Azadvar M, Alizadeh HR, Najafinia M, Safarnejad MR and Esfandiari S (2019) Citrus sudden decline disease in the south of Kerman province. Plant Pathology Science 8(2): 31-37. DOI: 10.2982/PPS.8.2.31 During recent years, the newly emerging disease, citrus sudden decline (CSD) has destroyed many of citrus trees grafted onto bael rootstock in the south of Kerman Province. The disease is caus...
The empirical data show a fundamental transformation in the fabric of the Iranian society in recent decades. The essence of this transformation is what we have called the “decline of community’, also labelled as the ‘depletion of social capital’, referring to the loss of social ties and the erosion of moral life which hold members of society together. In this article, drawing on a large volume ...
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