OBJECTIVE: Because the prevalence and pattern of IgE-mediated hypersensitivity to inhalant allergens may vary between different European regions, our goal was to evaluate ragweed aeroallergen sensitization in allergic rhinitis patients from the central part of the Romanian Plain, located in the southern part of the country. MATERIAL AND METHODS: In a two-year period we recruited patients with a...

the study was performed for assess the environmental factors affecting weed species diversity and composition of wheat (triticum aestivum l.) fields in jajarm, north-khorasan of iran, in 2009. the crop management (herbicide, amount of nitrogen applied and preceding crop type) and edaphic factors (ph, texture and content of phosphorus) of 16 fields were collected. shannon’s diversity index, spec...

Environ. Enlomol. 12: 2%-298 (1983) ABSTRACT Sweep-nel sampling and pilfalllrapping were used 10 survey insects in weedy and weedfree soybean habitals. Weedy soybean habitats consisted of (I) grassy soybeans; (2) soybeans with broadleaf weeds; and (3) soybeans with broadleaf weeds and grasses. Insect species diversity was greater in weedy soybean habitats than in weed-free soybeans. Greatest di...

(Phenology, fruit set and dispersal of Cordia multispicata Cham., an important weed shrub of abandoned pastures in eastern Amazonia). The reproductive ecology of the distylous tropical shrub Cordia multispicata was studied in an abandoned pasture in Paragominas County , Pará state, Brazil. It is a common species in the Amazon basin where it occurs as a weed in open and disturbed habitats. C. mu...

Red rice is a troublesome weed in rice-growing areas of the southern U.S. Red rice in Arkansas may be diverse enough to warrant some adjustments in weed control programs. A study was conducted at the Rice Research and Extension Center (RREC), Stuttgart, Ark., in 2003 to determine the phenotypic diversity of red rice in Arkansas. One hundred thirty-six red rice accessions were collected from 26 ...

BACKGROUND Aeroallergens are the most common causes of allergy. AIM The aim of this study was to determine hypersensitivity to aeroallergens in patients with nasobronchial allergy. METHODS This retrospective population study included 2254 patients with nasobronchial allergy, from late adolescents to adults. Their response to aeroallergens was assessed by skin prick tests. RESULTS More pat...

In cropping systems, integrated weed management is based on diversification. Rather than relying solely on one or two herbicides, a multiplicity of weed control strategies is employed. Yet, integrated weed management as currently practiced is far from integrated; every weed is still managed the same regardless of location or season. The recent development of precision application technology is ...

Almost all available sets of height growth reference values are constructed in a cross-sectional manner, except for a few studies in which longitudinal sampling was used. Such reference values are, however, flawed because of considerable individual variation in the timing of puberty, especially among children with early or late pubertal maturation. An additional complicating factor is that the ...

Reducing herbicide use may result in residual weed flora arable fields, increasing crop–weed competition for resources. In temperate cropping systems, light and nitrogen are the main resources which plants compete. As increases, soil mineral might become less abundant as of fertiliser is reduced environmental reasons (pollutions biodiversity loss). Better understanding crops weeds competitive a...