Agri 2022

Evaluation of allelopathic property of alternathere brasiliana vegetative parts on seed germination attribute of okra (Abelmoscus esculentus) L. Moench

Ngonadi Emmanuel Nzube

Ngonadi Emmanuel Nzube, Speaker at Agriculture Conference
Chukwuemeka Odumegwu Ojukwu University, Nigeria
Title : Evaluation of allelopathic property of alternathere brasiliana vegetative parts on seed germination attribute of okra (Abelmoscus esculentus) L. Moench


Some weeds that have been reported to have allelopathic potentials are always found in association with field crops. This association might be inhibitory or stimulatory, some of these weeds however have the potentials of becoming invasive under certain cropping system and environmental conditions. The objective of this study was to evaluate the most effective aqueous extract from three vegetative part of Alternanthera brasiliana on seed germination of okra. An in vivo, experiment was conducted to study the effect of water extract of leaf, stem and root of Alternanthera brasiliana on the germination of okra, in a completely randomized design (CRD) with three replicates. Three concentrations(10%, 20% and 40%) of each ground plant parts were studied with distilled  water used as control. The aqueous extracts of the plant parts and control were used to germinate seeds of okra in petri-dish with 5ml of extracts administered to each petri dish. Data were collected on number of germinated seeds daily, from 3 Days after Sowing (DAS) to 8DAS. Also length of plumules and radicles were measured and recorded at 8 DAS on five randomly selected germinated seeds. Data were analyzed by ANOVA and the means separated using the Duncan’s Multiple Range Test (DMRT). Results showed that germination percentage, mean radicle length and mean plumule length decreased with increasing concentrations. Reduction in germination, length of radicles and plumules was more pronounced in the leaf extract.


Mr. Emmanuel Ngonadi graduated from University of Maiduguri in 2002 with B. Agric (Honours) degree in the Faculty of Agriculture  and Master of Science (MSc) degree in Crop protection and Environmental Biology University of Ibadan in 2012. He went for PhD in Weed Science Management in 2019 which is still in progress. He was employed at Chukwuemeka Odumegwu Ojukwu University (COOU), Anambra State Nigeria in 2019 as Assistant Lecturer in the Department of Crop Science and Horticulture, where he served as a tutor, academic adviser, editorial reviewer in some international journals like Cogent Biology, Integrity journal etc. He is a researcher and  prolific writer, a member of Nigeria Society of Plant Protection (NSPP), Weed Science Society of Nigeria (WSSN).

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