Mengistu Bogale - Oromia Agricultural Research Institute (OARI), Cereal Crops Agronomist, Sinana Agricultural Research Center P.O. Box-۲۰۸, Bale-Robe, Ethiopia
Amare Biftu - Oromia Agricultural Research Institute (OARI), Agricultural Research-Extensionist, Sinana Agricultural Research Center P.O. Box-۲۰۸, Bale-Robe, Ethiopia
Ayalew Sida - Oromia Agricultural Research Institute (OARI), Agricultural Research-Extensionist, Sinana Agricultural Research Center P.O. Box-۲۰۸, Bale-Robe, Ethiopia

On-farm demonstration of post-emergence herbicide (Axial ۰۴۵ EC) was conducted at two districts (Goba and Dinsho) of Bale zone for the control of grass weeds in malt barley in the highlands of Bale during ۲۰۱۷/۱۸ main cropping season. Test crop used was improved malt barley variety IBON ۱۷۴/۰۳ at the rate of ۱۲۵ kg/ha. Fertilizer used was NPS at the recommended rate for the area (۱۰۰ kg ha-۱). The treatments consisted of ۲ ۴-D, ۲ ۴-D + Axial ۰۴۵ EC and weedy check. The result obtained from the two districts indicated that the herbicides (۲ ۴-D + Axial ۰۴۵ EC) are remained the most effective against the broad leaves and grass weeds in malt barley. Maximum barley grain yield was recorded at both districts (۲۷۲۰ kg ha-۱) at Dinsho and (۳۶۸۰ kg ha-۱) at Goba in plots treated with ۲ ۴-D + Axial ۰۴۵ EC with grain yield advantage over check (۵۸.۸۲%) and (۶۷.۳۹%) at Dinsho and Goba respectively. The second maximum grain yield was recorded at both districts in plots treated with ۲ ۴-D. The lowest grain yield was recorded in weedy check at both districts (۱۱۲۰ kg ha-۱) at Dinsho and (۱۲۰۰ kg ha-۱) at Goba. The Cost- benefit analysis also revealed that plots treated with ۲ ۴-D + Axial O۴۵EC gave the maximum net benefit at both districts. The lowest was recorded from weedy check plots. Hence, it is recommended that farmers should have to use both herbicides (۲ ۴-D + Axial O۴۵ EC) for the control of weeds (broad leaves and grass weeds) in malt barley. Farmers participated on demonstration and evaluation also selected (۲ ۴-D + Axial O۴۵ EC) as promising herbicides in controlling weeds in malt barley.On-farm demonstration of post-emergence herbicide (Axial ۰۴۵ EC) was conducted at two districts (Goba and Dinsho) of Bale zone for the control of grass weeds in malt barley in the highlands of Bale during ۲۰۱۷/۱۸ main cropping season. Test crop used was improved malt barley variety IBON ۱۷۴/۰۳ at the rate of ۱۲۵ kg/ha. Fertilizer used was NPS at the recommended rate for the area (۱۰۰ kg ha-۱). The treatments consisted of ۲ ۴-D, ۲ ۴-D + Axial ۰۴۵ EC and weedy check. The result obtained from the two districts indicated that the herbicides (۲ ۴-D + Axial ۰۴۵ EC) are remained the most effective against the broad leaves and grass weeds in malt barley. Maximum barley grain yield was recorded at both districts (۲۷۲۰ kg ha-۱) at Dinsho and (۳۶۸۰ kg ha-۱) at Goba in plots treated with ۲ ۴-D + Axial ۰۴۵ EC with grain yield advantage over check (۵۸.۸۲%) and (۶۷.۳۹%) at Dinsho and Goba respectively. The second maximum grain yield was recorded at both districts in plots treated with ۲ ۴-D. The lowest grain yield was recorded in weedy check at both districts (۱۱۲۰ kg ha-۱) at Dinsho and (۱۲۰۰ kg ha-۱) at Goba. The Cost- benefit analysis also revealed that plots treated with ۲ ۴-D + Axial O۴۵EC gave the maximum net benefit at both districts. The lowest was recorded from weedy check plots. Hence, it is recommended that farmers should have to use both herbicides (۲ ۴-D + Axial O۴۵ EC) for the control of weeds (broad leaves and grass weeds) in malt barley. Farmers participated on demonstration and evaluation also selected (۲ ۴-D + Axial O۴۵ EC) as promising herbicides in controlling weeds in malt barley.

Demonstration, Malt barley, Axial ۰۴۵ EC, ۲ ۴-D, Grain yield, Net benefit, IBON ۱۷۴/۰۳