Possibilities of chemical weed control in sorghum (Sorghum bicolor (l.) Moench) fields | Moznosti kemicnega zatiranja plevelov v posevkih sirka (Sorghum bicolor (L.) Moench)
2007
Vajs, S., Maribor Univ. (Slovenia). Agriculture and Life Sciences Fac. | Leskovsek, R. | Miklavc, J., Kmetijsko gozdarski zavod, Maribor (Slovenia) | Matko, B. | Lesnik, M.
A field experiment was conducted to evaluate herbicides in order to find suitable ones for the control of weeds in sorghum in Slovenia. 22 herbicide combinations based on pendimethalin, linuron, metolachlor, mesotrion, prosulfuron, 2,4-D, bentazon, dicamba, terbutylazin, isoksaflutole, bromoxynil, floralsulam, and penthoxamid were evaluated in terms of efficacy to control weeds and phytotoxicity for sorghum plants. The Cultivar 'Succrosorgho' (forage sorghum) was treated with a herbicide safener whereas the second cultivar 'Alföldi' (grain sorghum) was not. Yields of fresh green mass per hectare were also determined. Contrary to the cultivar Succrosorgho, a statistically significant correlation between the rate of herbicide phytotoxicity and the yield of sorghum plants was established in the case of cultivar Alföldi. The herbicides and/or herbicide combinations based on 2,4-D, pendimethalin, bentazon, dicamba, bromoxynil, pentoxamide and floralsulam could be recommended for the use in sorghum without safeners as they showed high yields with low phytotoxicities. Herbicide combinations based on linuron, isoksaflutole and mesotrion were severely phytotoxic to sorghum, therefore they can not be applied without specific safeners. Herbicides based on metolachlor and terbuthylasin could be used in sorghum untreated with specific safeners when, 5 to 10 % yield losses are tolerated.
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