Iranian Society of Weed Science Iranian Journal of Weed Science 1735-3548 18 1 2022 03 21 Evaluation of mesosulfuron-methyl+ iodosulfuron-methyl in the control of susceptible and resistant populations of Wild oat (Avena ludoviciana Durieu.) under the effect of adjuvant application Evaluation of mesosulfuron-methyl+ iodosulfuron-methyl in the control of susceptible and resistant populations of Wild oat (Avena ludoviciana Durieu.) under the effect of adjuvant application 91 99 128270 10.22092/ijws.2021.355728.1397 FA Alireza Ghafouri PhD candidate, Department of Agricultural Science, Mashhad Branch, Islamic Azad University, Mashhad, Iran Leila Alimoradi Department of Agricultural Science, Mashhad Branch, Islamic Azad University, Mashhad, Iran Mohammad Baghestani Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran Eskandar Zand Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran Mohamad Hassan Rashed Mohasel Faculty of Agriculture, Ferdowsi University of Mashhad, Iran. Journal Article 2021 09 08 A greenhouse study was conducted during 2020 at the Plant Protection Research Institute in Tehran. A completely randomized design in factorial arrangement with four replications was performed to evaluate the effects of five adjuvants (first factor), different doses combined with mesosulfuron-methyl+iodosulfuron-methylsodium (Atlantis OD 1.2%) herbicide (second factor) on the clodinafop-propargyl herbicide resistant and sensitive populations of wild oat (third factor). At the 2 to 3 leaf stages of the wild oat, 1.05, 1.2, 1.35 and 1.5 liters of herbicides per hectare with five types of additives (4, 2, 0.1, 0.04 and 0.03 liters per hectare were applied. Four weeks after spraying, percentage of fresh and dry weights and survival of the plants were measured. In all doses, Ino Alg NPK (NG) adjuvant had the greatest effect on reducing the fresh weight of sensitive and resistant wild oat biotypes. Among 4 doses of mesosulfuron-methyl+iodosulfuron-methylsodium herbicide, 1.5 and 1.05 times the recommended dose had the highest and lowest efficacy in fresh and dry weights reduction in sensitive and resistant populations of wild oat, respectively. According to the EWRC index data, the effectiveness of all adjuvants was the same on the sensitive populations (100%) but different on resistant populations. In general, Ino Alg NPK (NG) adjuvant and 1.5 times the recommended dose showed the highest efficiency in the control of both susceptible and resistant populations of wild oat. A greenhouse study was conducted during 2020 at the Plant Protection Research Institute in Tehran. A completely randomized design in factorial arrangement with four replications was performed to evaluate the effects of five adjuvants (first factor), different doses combined with mesosulfuron-methyl+iodosulfuron-methylsodium (Atlantis OD 1.2%) herbicide (second factor) on the clodinafop-propargyl herbicide resistant and sensitive populations of wild oat (third factor). At the 2 to 3 leaf stages of the wild oat, 1.05, 1.2, 1.35 and 1.5 liters of herbicides per hectare with five types of additives (4, 2, 0.1, 0.04 and 0.03 liters per hectare were applied. Four weeks after spraying, percentage of fresh and dry weights and survival of the plants were measured. In all doses, Ino Alg NPK (NG) adjuvant had the greatest effect on reducing the fresh weight of sensitive and resistant wild oat biotypes. Among 4 doses of mesosulfuron-methyl+iodosulfuron-methylsodium herbicide, 1.5 and 1.05 times the recommended dose had the highest and lowest efficacy in fresh and dry weights reduction in sensitive and resistant populations of wild oat, respectively. According to the EWRC index data, the effectiveness of all adjuvants was the same on the sensitive populations (100%) but different on resistant populations. In general, Ino Alg NPK (NG) adjuvant and 1.5 times the recommended dose showed the highest efficiency in the control of both susceptible and resistant populations of wild oat. https://ijws.areeo.ac.ir/article_128270_33665962c24cd29cbd8ccdf8c426311b.pdf