Response of okra (Abelmoschus esculentus (L.) Moench) to weed control by mulching

The effects of mulching material on okra performance during the rainy seasons of 1999 and 2000 were evaluated at the Teaching and Research Farm of the Ladoke Akintola University of Technology, Ogbomoso, Nigeria. Three mulch types–plastic mulch, grass mulch (Panicum maximum) and wood shavings (of Tectonia grandis)– were compared with hand weeding and no weeding control in a randomized complete block experiment with three replications. Growth and yield characteristics of okra were assessed together with weed control efficiency under the five treatments. Okra growth and yield were significantly (P hoe weeding > wood shavings > grass mulch.Les expériences se sont déroulées au champ d'enseignement et de recherche de l'Université de Technology de Ladoke Akintola à Ogbomoso pour évaluer les effets de matériel de paillis sur le rendement de gombo pendant les saisons des pluies de 1999 et 2000. Trois types de paillis-paillis en plastique, paillis en herbe (Panicum maximum) et paillis en copeaux de bois (de Tectonia grandis) étaient comparés avec le désherbage à la main et le contrôle de non désherbage dans une expérience de bloc complet choisi au hasard avec trois reproductions. Les paramètres de croissance et de rendement de gombo étaient évalués ensemble avec l'efficacité du contrôle de mauvaise herbe sous les cinq traitements. La croissance et le rendement de gombo étaient considérablement (P sarclage > copeaux de bois > paillis en herbe. Ghana Journal of Agricultural Science Vol. 39 (1) 2006: pp. 35-4

Effect of Plant Population Density on Growth and Weed Smothering Ability of Cowpea (Vigna unguiculata (L.) Walp.)

Akidi (cowpea), a landrace of Vigna unguiculata, was grown at densities of 30,121 (D1), 40,323 (D2), 50,000 (D3), 60,976 (D4), 80,645 (D5), and 0 (D6) plants/hectare in a randomized complete block design to assess the effect of intraspecific (between cowpeas) on its performance and weed smothering ability in the instance of utilizing it in intensive fallow management. At 10 weeks after sowing (WAS), the low-density plants (D1) were shorter (127.55 ± 1.84cm), produced highest stem diameter of 11.59 ± 0.86mm, and shoot dry weight/plant (12.46 ± 0.70g). The high-density cowpea treatment (D5) had the longest vines (197.93 ± 1.54cm) and relatively low shoot dry weight/plant (9.22 ± 0.64g). The D5 treatment was significantly better than other treatments in weed control and dry matter yield per unit area. Tithonia diversifolia and Sida acuta which are heliophytes were encountered in low-density treatments of D1 and D3, where the highest light intensities reached the soil

Effects of cowpea (Vigna unguiculata L. Walp.) as a Live mulch on weed management in maize cropping

Weed interference is a major constraint in maize cultivation. Living mulch as an alternative weed control strategy has been established to be environmentally safe but has not been widely used in maize cultivation. The aim of this research was to evaluate the weed management attributes of Vigna unguiculata in maize cropping. A field study was carried out in the crop garden of the Department of Crop Protection and Environmental Biology, University of Ibadan, Nigeria. The treatments were maize interplanted with Cowpea at 20,000 (M1), 30,000 (M2), 40,000 (M3) plants/hectare, hoe weeding (M4), weedy check (M5) and Primextra-2.5 L/ha (M6). The treatments were arranged in randomized complete block design, each replicated four times. Weed Dry Weight (WDW) and Weed Control Efficiency–WCE (%) were calculated following standardized methods. Data were analysed using descriptive statistics and ANOVA at α0.05. The treatment plots were dominated by weed species in the Asteraceae, Fabaceae and Poaceae families. The M5 accounted for the highest WDW (126.30 g). The WCE was highest in M3 (94.8%) and least in M5 (66.4%). Maize and cowpea interplant at 40,000 plants/hectare suppressed weed. Hence, cowpea is an ideal weed suppressant and can be inter-planted as a cover crop in maize cropping systems