bionomics of aphis gossypii glover and its predators coccinella septempunctata l. and hippodamia variegata goeze were studied in varamin (tehran province) during 11th may to 5th october 2006 on eggplant crop, with the interaction (density dependence) between the aphid and either of the predators determined. the reliable sample size (number of leaves) with a maximum variation of 6.73% was about ...

Population distribution has been long studied. There are no clear answers as to what the major influential factors that drive population density are. Using ArcGIS 9.1, this study focuses on global population distribution and it’s relationship to selected biological and environmental factors. Using geoprocessing techniques such as reclassify, weighted overlay and modelbuilder, models where creat...

the turkmans are one of the iranian ethnic population. hla typing (class i and ii) was performed in this population. the data obtained from this study was compared with different populations of the world. we observed that the turkman population is most similar to the northern chinese and uigur population. the distributions of hla antigens in turkmans are somewhat between iranian population, nor...

contact dermatitis is frequent skin pathology and eyelids are one of the more frequent locations of this pathology. the objective of the present work was to study the population distribution of periocular dermatitis, determine the allergens which most frequently indicate positive in patch tests and in provocative use tests, and analyse the clinical relevance of the positive tests. patients with...

abstract in order to investigate density fluctuation and spatial distribution of the main aphidophagous predators and develop a fixed-precision sequential sampling plan, a weekly sweepnet sampling was conducted at five winter wheat fields in gorgan region in northern iran, during two growing seasons of 2006 and 2007. spatial distribution of the predators was described by fitting data to poisson...