introduction: increasing costs of herbicide inputs in intensive crop production systems and the incidence of herbicide resistance in weeds have renewed interest in exploiting crop competitiveness to reduced herbicide use. two factors contribute to crop competitiveness against weeds: ability to withstand competition (awc), or the ability to maintain high yields in the presence of weeds, and weed...

agrobacterium rhizogenes causes hairy root disease in plants. these hairy roots are ge-netically stable and grow rapidly. transformed hairy roots of hyoscyamus muticus in-duced by the bacterium can produce tropane alkaloids in trace amounts of intact plant tissues. in this research, in order to compare growth and biosynthetic stability of hairy roots with wild type ones, leaf and nodal segments...

to compare the reproductive performance of the wild and cultured stocks of beluga, huso huso males, some spermatological parameters were measured including: sperm motility, sperm density, spermatocrit and also fertilization rate, hatching rate and larval growth and survival rates. the semen samples were sampled from 11 wild spawners and 12 cultured brooders. a half of each semen sample was allo...

abstract the aim of this study is to determine the level of people’s awareness and willingness towards the protection of persian wild ass (equus hemionus onager), to recommend solutions that can improve management and conservation of this species. in this descriptive-analytical study, 660 people from fars province were chosen via the clustered method. a questionnaire comprising items about the ...

to evaluate the effect of different levels of nitrogen fertilizer on growth indices and competitive ability of canola (brassica napus l.) against wild mustard (sinapis arvensis l.), a split plot trial based on a randomized complete block design with three replications, was carried out at agricultural faculty of bu-ali sina university, during 2008-2009. experimental factors were amounts of nitro...

to investigate the effect of wild mustard plant density and nitrogen fertilizer on morphological characters, yield and yield components of canola a split-plot experiment based on a randomized complete block design with 3 replications was carried out in bu-ali sina university of hamedan, in 2009. 4 levels of nitrogen fertilization (100, 150, 200 and 250 kgn h-1) were assigned to main-plots and p...

to evaluate the role of effective factors on competition of two wheat cultivars against two species of narrow leaf and broad leaf weeds this study was conducted as two separated experiments based on a randomized complete block design with 3 replications at agricultural faculty of bu-ali sina university, in 2008-2009. in both experiments, alvand and sayson cultivars were planted with densities o...

Leishmania infantum, an etiologic agent of zoonotic visceral leishmaniasis (VL), is spreading in Iran. Dogs are the main reservoirs but L.infantum has been detected in jackals, foxes and wild rodents too. Despite high number of rodents in the world, the exact role of them in epidemiology of VL is not clear. In recent years the number of sporadic cases of dogs and humans VL has been increased in...