Helen O. Imafidor

• B.Sc (Zoology), MSc., Ph.D (Parasitology)
• Professor (Full) at University of Port Harcourt

This study investigates pesticide residues in cucumber plants and their impact on soil nematode populations while evaluating the effect of pesticides on cucumber growth and yield. Gas Chromatography Tandem Mass Spectrometry (GC-MS/MS) was used to quantify pesticide residues, comparing the results to the Maximum Residue Limits (MRLs) defined by the...

This in vitro study is to establish phytochemicals and the nematicidal potential of organic extract from Datura stramonium and Gongronema latifolium on egg hatch inhibition of M. incognita for an effective root knot nematodes control. The tested botanical extract were found to possess alkaloids, flavonoids, saponins, steroids, phenols, terpenoids a...

The present in vitro study was to ascertain the phytochemicals and the nematicidal potential of organic extract of Datura stramonium and Gongronema latifolium on egg hatch inhibition of M. incognita for the effective control of root knot nematodes. The tested botanical extract are found to possess alkaloids, flavonoids, saponins, steroids, phenols,...

The current study was aimed at determining the nematicidal efficacy of Helianthus annuus and Chromolaena odorata in the management of M. incognita. The qualitative and quantitative screening of the phytochemicals present in the extracts of tested botanical was done with the gas chromatography flame ionization detector and spectrophotometric analysi...

Yam; Dioscorea species of cropsare multivariantstaples in Nigeria and are plagued by plant parasitic nematodes (PPNs).Four species of Dioscorea; D. rotundata (white yam), D. cayenensis (yellow yam), D. alata (water yam), D. dometerum were selected to determine therelationaship between PPNsload and the nutritional status of the tubers. Proximate ana...

Crude oil spill destroys biodiversity and adversely impacts the physicochemical characteristics of the terrestrial and aquatic environments. The population characteristics of soil nematodes can serve as indicators of alterations in the terrestrial environment. To determine the effects of crude oil spillage on the soil nematode fauna status; a study...

This study aimed at investigating the sex and age-related parasitic burden of Clarias gariepinus cultured in earthen ponds. Eighty-five (85) fish samples were selected randomly for analyses from three earthen ponds. Sexing was done by the observation of the urinogenital papillae. For parasitological analysis, skin and gill scrapes were taken for ex...

A study to compare the intensity and prevalence of parasites in the organs of pond cultured fish was carried out at the African Regional Aquaculture Centre, Aluu, Rivers State. A total of 85 Clarias gariepinus samples were examined from 3 earthen ponds. All Ponds had same water sources and were limed and screened. Fish were fed with processed feed...

This screen house study was conducted to investigate the effect of the application of cow dung to crude oil polluted soils. Four rates of cow dung (0, 1, 2 and 3g) and four rates (0, 5, 10 and 15ml) of crude oil per 10kg of soil were used, a total of sixteen (16) treatment combinations were applied. Each treatment was replicated three times, for a...

Background: This study was conducted to determine the effects of physico-chemical parameters of soils in environments used for open defecation on the abundance of geohelminths in Emohua, Rivers State, South South, Nigeria.

Biopesticides have found intrinsic application in the control of plant pests and diseases, due to their eco-friendly activities and bioavailability as opposed to synthetic pesticides. Nematode infestation has become a major problem associated with poor yield and low economic value of farm produce. The height and dry shoot weight (DSW), of C. annum...

A study to determine the response of nematodes as bio-indicators of environmental alterations was carried in the New Calabar River in the Niger Delta. Samples were randomly collected from the benthic zone of the River using the modified Baermann’s technique. The study yielded sixteen (16) nematodes belonging to three (3) families and eight (8) spec...

Abstract Plant parasitic nematodes especially Meloidogyne species are linked to global reduction or loss in the yield of agricultural produce. If plant diseases are left unchecked, it could lead to food shortage. Synthetic nematicide could induce toxicity, environmental degradation and are expensive. Root-knot nematodes (RKN) are devastating as it...

Abstract Plant-derived pesticides have become a mainstay in the control of pest, due to the fact that synthetic pesticides induce environmental degradation. The effective control of plant nematode has been found to improve the yield and economic value of farm produce. Certain growth parameters are visible in diseased plant, these in turn affects th...

Abstract. The plant parasitic nematode status of four yam species; D. alata, D. cayensis, D. dometurum and D. rotundata in four communities in Khana LGA, Rivers State, Nigeria was carried out. 160 randomly selected seed yams comprising 40 yam samples from each of the communities in the study area were sampled. 40 yam samples from each of the commun...

A study to determine the influence of agro-related anthropogenic activities on soil nematode spatial distribution in the Niger Delta was carried out in three designated areas with different cropping practices. Soil samples were randomly collected from the Niger Delta Development Commission (NDDCF) farm: mixed-cropping (Site A); Rivers State Oil Pal...

Introduction Adaptation is the evolutionary process whereby an organism or a population becomes better suited to its habitat. Knowledge of specific habitats is also critical in the study of the distribution and adaptation of plants and animals. Adaptation may be a feature which is especially important for an organism's survival and such adaptation...