Correlation Studies On Meloidogyne – Induced Galls And Some Growth Parameters Of Elite Varieties Of Okra Abelmoschus Species

Comparative Effect of Rotylenchulus reniformis and Meloidogyne incognita on the Productivity of okra in Nigeria

“…Cracks occurring on the large galls has an implication for secondary pathogen invasion, possibly causing further losses. This is similar to the findings of (Nwanguma, 2002) on okra, where the study demonstrated how heavy galls on okra plants led to reduced growth and yield parameters and predisposed plants to secondary invasion. The rating for reniform nematode in this study was at the maximum for the field experiment.…”

“…R. reniformis is usually found in mixed populations with M. incognita and the disease symptoms in such situation is often only associated with root-knot nematodes. Many authors in Nigeria have found the reniform nematode in moderate populations associated with various crops (Adegbite et al, 2006;Olabiyi et al, 2009;Afolami et al, 2014;Daramola et al, 2015) but they did not consider the nematode to be damaging. This implies that the reniform nematode can be present in damaging populations and be left undiagnosed and uncontrolled due to lack of association as a potential pest problem.…”

“…Yield increases on okra, tomato, and lettuce of 19, 15, and 57% were obtained with treatment of granular nematicides, respectively on Rotylenchulus reniformis infested soil (Sikora and Fernandez, 2005). R. reniformis has been reported to be associated with various crops (Adegbite et al, 2006 ;Daramola and Afolami, 2014 ;Olabiyi et al, 2009) in Nigeria but has not been clearly connected to any quantitative loss of yield in Nigeria. The aim of this study was to assess the effect of the reniform and root-knot nematodes associated with the infection of okra.…”

Management of Root-Knot Nematode (Meloidogyne incognita) in Okra (Abelmoschus esculentus L.) Moench) using Trichoderma Species and Poultry Manure

“…The okra variety (Clemson spineless) used in this study was found to be highly susceptible to Meloidogyne incognita with gall index of 5.00 in soils without poultry manure and uninfested with either species of Trichoderma. This observation is in line with the report of Nwanguma (2002). Severe galling on the roots of okra plants by Meloidogyne incognita could be attributed to a conducive soil environment as nematodes activity is generally enhanced in sandy soils as reported by Agu (2008) and Olewe (2005).…”

“…Increase in the rate of poultry manure led to a significant reduction in root galls, nematode density in both soil and okra plant and the reproduction factor (Rf ) compared with soils without amendment. Generally, application of organic amendments either of plant or animal origin has been reported by many authors to suppress nematode population in the soil as well as their damage potentials (Nwanguma, 2002;Radwan et al, 2007;Oka, 2010;Renco, 2013). Various mechanisms have been advanced for the possible effects of organic amendments on the tripartite interaction of nematode-plant soil system (Oka, 2010;Mcsorley, 2011;Renco, 2013).…”