Efficacy of S-metolachlor and flumetsulam (triazolopyrimidine sulfonanilide)+S-metolachlor (chloro-acetanilide) as pre-emergence herbicides in controlling weeds in maize at Chisumbanje Estate

Field trials were conducted during the 2019-2020 cropping season to assess efficacy of S-metolachlor and flumetsulam (triazolopyrimidine sulfonanilide)+S-metolachlor (chloro-acetanilide) pre-emergence herbicides in controlling weeds maize at Chisumbanje estate. The experiment was laid out as a randomised complete block design (RCBD) with three treatments replicated thrice. Treatments used include hand weeding (control), herbicide. data collected based on weed density, plant height, grain yield indicating significant differences (p<0.05) amongst treatments. Flumetsulam scored least density per m-2 compared showing that it is an effective herbicide (33, 27 22) Mexican marigold (Tagetes minuta), shamva (Rottboellia cochinchinensis) grass wild jute (Corchorous tridens) respectively. control (hand weeding) highest m-2, method not 10 tonnes/hectare whilst 7.6 5.6t/ha Herbicides reduced spectrum resulting realisation higher sulfonanilide) + followed by S-metolachlor. Farmers are recommended use so realise yields low density.