SUMMARY Simazine loss from soil to surface runoff water produce both a decrease in the effectiveness of the soil chemical treatment and a water quality hazard in receiving waters. Simazine has been found in 30% of wells sampled in Fresno and Tulare counties, California and some contamination has been attributed to simazine use in citrus orchards. Contamination of receiving water from herbicides...

field experiments were conducted in zanjan, markazi, esfahan, and chaharmahal va bakhtiari provinces to evaluate imazetapyr herbicide efficiency for weed control in common bean (phaseolus vulgaris l.) in 2006. there were four replications at each site and treatments were arranged in a randomized complete block design. in zanjan, maximum weed biomass reduction by 91 and 88 percent were achieved ...

Site-specific weed management requires sensing of the actual weed infestation levels in agricultural fields to adapt the management accordingly. However, sophisticated sensor systems are not yet in wider practical use, since they are not easily available for the farmers and their handling as well as the management practice requires additional efforts. A new sensor-based weed detection method is...

chickpea (cicer arietinum) is the third most important pulse crop in the world, grown widely across asia and the middle east. weed is one of the main limiting factors in chickpea (cicer arietinum) production. several characteristics of chickpea (cicer arietinum), such as slow plant emergence, short plant height, and chickpea morphology allow weeds to compete effectively. to investigate the effe...

Soil seedbanks drive infestations of annual weeds, yet weed management focuses largely on seedling mortality. As weed seedbanks increasingly become reservoirs of herbicide resistance, species-specific seedbank management approaches will be essential to weed control. However, the development of seedbank management strategies can only develop from an understanding of how seed traits affect persis...

a two year field experiment was carried out to evaluate the effects of municipal waste compost (c), composted cattle manure (m), and nitrogen (n) on growth and composition of weeds in a corn field in shiraz using a split-split plot design with 3 replicates. visual inspection of the plots showed that the manure treatments neither introduced new weed species nor increased weed density more than t...

in order to investigate the effects of common lambsquarters (chenopodium album l.) competition on corn (zea mays l.) morphological and physiological characteristics, an experiment was conducted in 2005-2006 at the research station of agricultural faculty, ferdowsi university of mashhad, iran. the experimental design was split plot based on randomized complete block design (rcbd) with three repl...