Weeds of the irrigated wheat in Lorestan
1995
Mirkamali, H. | Shekarian, B.
Irrigated wheat fields in Lorestan province are mostly infested with weeds. Surveys were carried out in 1991 and 1992 to identify the major problem weeds. More than 32 weed species were listed, of which about 90 were broadleaves. Bedstraw Galium tricornutum, Vetchling Lathyrus spp. and Corn Buttercup Ranunculus arvensis occurred in more than 50 percent of the field. Bedstraw was dominant in all the three main areas Boroojerd, Khoram- Abad and Aleshtar; Great- But- Parsley Turgenia latifolia and Field Bindweed Convolvus arvensis were dominant in two areas and Field Poppy Papaver dubium, Vetch Vicia spp., Charlock Sinapis arvensis and Cornweed Centaurea depressa were each dominant in only one of the three areas. Common Rye Secale cereale and Wild Oats Avena ludoviciana (and A. fatua) occurred on 39 and 30 percent of the fields, respectively. Since Vetching species show some tolerance to 2,4-D (+MCPA), which is the most common herbicide applied in wheat in the province, continuous annual applications of the herbicide have to be prevented. With regards to Common Rye, since available selective grass killers are not effective against this grass, more attention has to be paid to preventive measures (mainly use of clean seed)
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