Study on persistence causes of weeds in wheat fields of cold regions.
2014
Minbashi, Mehdi | Sabeti, Peyman | Veisi, Mozhgan | Safavi, Seyed Afshin | Mohammadi, Abdol Reza | Babakfard, Ahmad
In order to investigate the reason of poor chemical control of weeds in wheat fields of cold climate regions of Kermanshah province, some experiment were carried out during two years of 2010 and 2011. In these experiment based on designed instruction every year 100 fields (totally 200fields) were investigated. Our results indicated that the weeds oats (Avena ludoviciana), corn radish (Sinapis arvensis), wild mustard (Raphanus raphanistrum), field binweed (Convolvulus arvensis), hairy vetch (Vicia villosa), (Galium tricornatum), common lambsquarters (Chenopodium album), wild oat (Hordeum spontaneum), mouse barley (Hordeum murinum) and licorice (Glycyrrhiza glabra) are the most important weeds in wheat fields of Kermanshah province. Based of our perceptions 83 percent of the weeds in wheat fields are controlled effectively 3-tribenuron methyl, 2, 4-D + mcpa and clodinafop propargyl. Application of the herbicides against broadleaf weeds was 51%, against grasses was 8% and combination of both kinds of herbicides (mostly 3- benuron methyl and 2, 4-D + mcpa with clodinafop propargyl) allocated 37% of using of herbicides in wheat fields of kermanshah province. During former 5 years 3 cultiation patterns including wheat- wheat, fallow - wheat and wheat - barley were applied in above mentioned fields 65% of the weak points in weed management of wheat fields was due to no attention to the damage caused by weeds and no familiaity with spraying methods, no access to required instructions and non following of correct doses of herbicides. Key words: cultivation patterns, herbicide, weed management, sprayer
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