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Mohassel, Mohammad Hassan Rashed,Aliverdi, Akbar,Hamami, Hossein,Zand, Eskandar The Korean Society of Weed Science and The Turfgra 2010 Weed Biology and Management Vol.10 No.1
Optimizing the herbicide dose by the addition of adjuvants is an acceptable way to reduce the risk of side-effects from herbicides. Therefore, to detect a suitable adjuvant for diclofop-methyl, cycloxydim, and clodinafop-propargyl against littleseed canarygrass (Phalaris minor) and wild oat (Avena ludoviciana), six dose. response experiments were conducted. The treatments consisted of diclofop-methyl at 0, 112, 225, 450, 675, and 900 $g\;ai\;ha^{-1}$, cycloxydim at 0, 15, 30, 60, 90, and 120 $g\;ai\;ha^{-1}$, and clodinafop-propargyl at 0, 8, 16, 32, 48, and 64 $g\;ai\;ha^{-1}$ with and without the adjuvants of Frigate, olive oil, and castor oil at 0. 2% (v/v) in order to control both littleseed canarygrass and wild oat. Tested herbicides performance was enhanced by all adjuvants against littleseed canarygrass and wild oat. The addition of Frigate and the vegetable oils had the lowest and the highest effect on the performance of all of the herbicides on both littleseed canarygrass and wild oat, respectively, which confirms the solubilizing nature of the cuticular waxes by vegetable oils. A comparison between the two vegetable oils revealed that olive oil exerted a greater control of littleseed canarygrass than did the castor oil. In contrast, castor oil exerted a greater control of wild oat than did the olive oil, which can be related to differences in the leaf surface micromorphology of the weeds.
Genetic diversity of Iranian wild barley (Hordeum spontaneum Koch.) populations
Hosseini Mojtaba,Yassaie Mohsen,Rashed-Mohassel Mohammad Hassan,Ghorbani Reza,Niazi Ali 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.3
An efective weed management program requires a comprehensive knowledge of a weed’s genetic diversity. Wild barley (Hordeum spontaneum Koch) is known as an invasive weed that is rising in commercial cereal felds of Iran. Genetic diversity of 31 populations of Iranian wild barley consisting of 27 populations from Fars province along with four collected from Alborz, Kermanshah, Khuzestan, and Lorestan provinces was investigated using 15 ISSR markers. Cluster analysis showed that populations were divided into six main groups based on 88.5% similarity level. According to PCoA results, seven groups were determined based on populations’ data. The maximum similarity is recorded between Fasa and Darab populations (95.6%) and the minimum was noted between Sepidan and Mohr (78.6%). Genetic variation within the investigated wild barley populations (53%) was higher than between populations (47%). Results of Mantel test revealed a correlation between population distance and latitude, rainfall, annual temperature, and population geographic distances. Generally, latitudes, annual mean temperature, and annual mean rainfall are infuenced by genetic diversity of wild barley in Iran.