• Korean Journal of Weed Science
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• v.3 no.1
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• pp.100-104
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• 1983

Responses of barley cultivars including 8 covered barley cultivars and 8 naked barley cultivars to butachlor, terbutryn, and methabenzthiazuron were evaluated by determinating crop injury, dry weight and chlorophyll content of barley seedlings. Most barley cultivars were tolerant to butachlor at 1478 ai/10a (recommended rate) but Olbori, Dongbori, and Gangbori were slightly sensitive to butachlor at 294g ai/10a. Sensitivity to terbutryn was generally greater in naked barley cultivars than hulled barley cultivars. Dongbori, Buhobori, and Bunong of hulled barley and Bangsa #6, Kwangseung, Nonsangwa # 1-6, and Iri #4 of naked barley were highly sensitive to terbutryn at 350g ai/10a (double dosage). Most barley cultivars were relatively tolerant to methabenzthiazuron except Iri #4. Dry weight of barley seedlings was not reduced by butachlor, terbutryn, and methabenzthiazuron at recommended rate. However, terbutryn at 350g ai/l0a greatly reduced dry weight of all barley cultivars, especially naked barley cultivars. Chlorophyll content of Owealbori, Dongbori #1, Jogangbori, Bangsa #6, Backdong, and Kwangseung was slightly reduced by butachlor. Terbutryn at 175g ai/10a reduced chlorophyll content of Owealbori, Olbori, and Nonsangwa #1-6 and all cultivars were greatly reduced by terbutryn at 350g ai/10a. Methabenzthiazuron slightly reduced chlorophyll content of Jogangbori, Dongbori #1, Owealbori, Backdong, Kwangseung, and Nonsangwa # 1-6.