Fabiyi, O.AAtolani, O2023-06-132023-06-132011Fabiyi, O. A. and Atolani, O. (2011). Lawsonia inermis in the control of Meloidogyne spp on Corchorus olitorius. Electronic Journal of Environmental, Agricultural and Food Chemistry. 10 (3): 2000-2006.1579-4377https://uilspace.unilorin.edu.ng/handle/20.500.12484/11074Meloidogyne incognita ControlThe efficacy of cypress shrub, Lawsonia inermis L. in the control of root – knot nematodes, Meloidogyne spp was investigated in the laboratory and the Screenhouse. In the laboratory, only the aqueous extract of the test plant (Lawsonia inermis) was assessed for its effects on nematode egg hatch and juvenile mortality. For the Screenhouse, the experimental design was a 2x2x3 factorial experiment, fitted into a randomized complete block design, involving two levels of nematode population (0 and 300) and two forms of test plant application (aqueous extract and powdered form). In the laboratory, the aqueous extracts of Lawsonia inermis caused a significant reduction (P< 0.05) in nematode egg hatched. Egg hatch was 92.0% in the untreated control (0% extract) as compared to 11.7% in 25% crude extract of Lawsonia inermis (L) extract. Within two days of the experiment 98.4% mortality was observed in 100% crude concentration of Lawsonia inermis (L), as compared with 0% mortality in the control. All concentrations of the extract caused significantly higher mortality than the control. In the screenhouse, 15% aqueous crude concentration, significantly reduced nematode population in the root and in the soil. All treated plants were also less galled compared to the untreated control.enLawsonia inermis; Meloidogyne spp; nematodes; screenhouseArticle