Background Amaranthus hybridus, a common agricultural weed in Brazil, has been associated with complications the management of major crops. Recently, A. hybridus biotypes suspected resistance to herbicide glyphosate have observed state Paraná. Objective To characterize glyphosate-resistant biotypes. Methods Three independent experiments were conducted evaluate four hybridus. Twelve doses applie...

abstract in order to determine the critical period of weed control in euro-flour variety of sunflower (helianthus annus, l.) an experimental was conducted with a randomized complete block design with 10 treatments and three replications in islamic azad university astara-branch-agricultural college in 2006 growing season. experimental treatments were conducted in two sets, the first set included...

introduction:the prevalence of atopic diseases has increased in recent decades dramatically. the most common aeroallergens in northeastern iran have not been fully defined. define the most common aeroallergens in allergic patients based on the skin prick test (spt) was aimed in this investigation.materials and methods:this cross-sectional study enrolled 1,006 allergic patients (aged 1–86 years)...

the performance of different yield loss models from an exponential family was evaluated in safflower-redroot pigweed systems in two field experiments conducted during 2007 and 2008 growing seasons at the research field of agricultural college of shiraz university, iran. the yield loss of safflower was recorded as relative yield loss in experimental plots laid out in split plot design with three...

Sanguinaria canadensis L., commonly known as bloodroot, red puccoon, Indian paint, redroot, pauson, or tetterwort, is found throughout most of North America east of the Rocky Mountains (Reed 1999). This herbaceous perennial is a member of the Papaveraceae (poppy family) (Reed 1999). It reaches a maximum of ten inches in height, has basal leaves that can be as wide as eight inches, and a white a...

this experiment was set to study the allelopatic effect of aqueous and alcoholic extracts of artemisia, coriander, eucalyptus and cumin on growth of red root pigweed and lambsquarters weeds at laboratory and field in the university of tehran (karaj-iran) in 2008. the herbal plant samples were ground and powdered for extraction preparation, and were mixed with distilled water in a beaker. the ex...

Recebido para publicação em 29/10/2008 Aceito para publicação em 16/5/2009 (003913) 1 Departamento de Nutrição, Faculdade de Saúde Pública, Universidade de São Paulo – USP, Av. Dr. Arnaldo, n. 715, CEP 01246-904, São Paulo – SP, Brazil, E-mail: [email protected] 2 Instituto do Coração (Heart Institute) (InCor), Faculdade de Medicina, Universidade de São Paulo – USP, São Paulo, SP, Brazil *A quem ...

in order to examine of the weed damage on corn and determination of the most suitable index for corn (zea mays l.) yield reduction in field condition and multi-species weed competition, an experiment as an interval mapping was carried out in the researching field of mashhad university during 2008-2009. treatments were complete control (pre-planting treflan and hand weeding), no control (no herb...