Period of Weed Control in Okra [Abelmoschus esculentus (L.) Moench] as Influenced by Varying Rates of Cattle Dung and Weeding Regimes

Abstract

Field trials were conducted during 2005 and 2006 planting seasons to investigate the influence of cattle dung and the critical period of weed interference on growth and yield components of okra [Abelmoschus esculentus (L). Moench]. The study was a factorial trial laid out in a split plot design and replicated three times. The main plot comprised of four levels of cattle dung and the sub plots were three regimes of weeding. The growth attributes viz; plant height, number of leaves, leaf area and dry matter production differed significantly due to different treatments. These attributes increased significantly owing to application of cattle dung which leads to continuous availability of nutrients to the plants as well as appropriate timing of weeding which reduced the influence of weed interference on the okra. Yield and yield components were influenced significantly by application of cattle dung and weeding regimes. Highest fresh fruit yield (102.93 t ha-1) was observed in plots that received 8 t ha-1cattle dung and weeded at 3 and 6 weeks after sowing. Application of 8 t ha-1 of cattle dung as well as weeding at 3 and 6 weeks after sowing significantly enhanced okra growth and fruit yield. However, plots with sub-optimal cattle dung rate and infested with weeds till harvest produced least dry matter and fresh fruit yield.