Iranian Society of Weed Science Iranian Journal of Weed Science 1735-3548 8 2 2012 12 21 Evaluation of Some Herbicides to Weed Control in Seedling Alfalfa Evaluation of Some Herbicides to Weed Control in Seedling Alfalfa 13 24 2725 FA Ebrahim Mamnooie Parviz Shimi Journal Article 2013 07 09 of Jiroft in a randomized complete blocks design with 3 replications and 8 treatments for two years. Treatments included Imazethapyr %10 SL at 0.5, 0/75 and 1 Lit/ha + Cytogate at 1Lit/ha in 10-15 cm alfalfa, post emergence of weeds + Cycloxydim %10 EC at 2 Lit/ha post emergence of grass weeds, Pendimethalin %33 EC at 2 and 3 Lit/ha (pre- emergence), Chlorthal-dimethyl %75 WP at 6 and 8 kg/ha + Cycloxydim at 2 Lit/ha, weed free check. The results showed that Chlorthal-dimethyl and Pendimethalin controlled Malva parviflora better than Imazethapyr, and Imazethapyr controlled Brassica tourenforti better than Chlorthal-dimethyl and Pendimethalin. All herbicides showed similar efficiency on Chenopodium and Digera muricata control. Imazethapyr was the best herbicide of the experiment and at 0.5 and 0.75 Lit/ha produced the highest alfalfa biomass in<span> the </span>first and second harvests. Chlorthal-dimethyl increased alfalfa biomass at second harvest, but Pendimethalin caused phytotoxocity on alfalfa and reduced its biomass. of Jiroft in a randomized complete blocks design with 3 replications and 8 treatments for two years. Treatments included Imazethapyr %10 SL at 0.5, 0/75 and 1 Lit/ha + Cytogate at 1Lit/ha in 10-15 cm alfalfa, post emergence of weeds + Cycloxydim %10 EC at 2 Lit/ha post emergence of grass weeds, Pendimethalin %33 EC at 2 and 3 Lit/ha (pre- emergence), Chlorthal-dimethyl %75 WP at 6 and 8 kg/ha + Cycloxydim at 2 Lit/ha, weed free check. The results showed that Chlorthal-dimethyl and Pendimethalin controlled Malva parviflora better than Imazethapyr, and Imazethapyr controlled Brassica tourenforti better than Chlorthal-dimethyl and Pendimethalin. All herbicides showed similar efficiency on Chenopodium and Digera muricata control. Imazethapyr was the best herbicide of the experiment and at 0.5 and 0.75 Lit/ha produced the highest alfalfa biomass in<span> the </span>first and second harvests. Chlorthal-dimethyl increased alfalfa biomass at second harvest, but Pendimethalin caused phytotoxocity on alfalfa and reduced its biomass. https://ijws.areeo.ac.ir/article_2725_fc6083902b7beca9ff5749399ef31e3a.pdf