International Journal of Agroforestry and Silviculture

International Journal of Agroforestry and Silviculture ISSN: 2375-1096 Vol. 13 (1), pp. 001-004, January, 2025. Available online at www.internationalscholarsjournals.org © International Scholars Journals

Full Length Research Paper

Growth and Development of Shoots from Gongronema latifolia Benth Stem Cuttings in Various Rooting Media

Agbo, C.U.* and C.M. Omaliko

Department of Crop Science, University of Nigeria, Nsukka, Nigeria.

Accepted 11 November, 2024

Abstract

Vegetative propagation of Gongronema latifolia Benth commonly used as a forest leafy vegetable and spice, was studied in three rooting media (sawdust, ricehull and soil) under two seasons in Nsukka. The study showed that G. latifolia could be effectively propagated by stem cuttings. There was significant reduction in number of days to shoot initiation and growth in sawdust medium in the wet season. Sawdust and soil gave a better performance of the cuttings in opening of apical buds, initiation of shoots, percentage of rooted cuttings, number of vines, vine length and number of opposite leaves on vines in both seasons. Even though, both media performed similarly in most of the attributes, sawdust medium will be preferred to soil because it is readily available and affordable. Effective and high percentage rooting of G. latifolia stem cuttings, which will provide excellent conservation of a selected clone derived from virgin forest and hybridization, could be achieved in sawdust medium during the dry season.

Key words: Gongronema latifolia, rooting media, propagation, stem cuttings.

International Journal of Agroforestry and Silviculture ISSN: 2375-1096 Vol. 13 (1), pp. 001-005, January, 2025. Available online at www.internationalscholarsjournals.org © International Scholars Journals

Full Length Research Paper

Analyzing the Effectiveness of Forest Policy in Nigeria: A Case Study of Edo State

Kalu, C.* and Izekor, D. N.

Department of Forestry and Wildlife, Faculty of Agriculture, University of Benin, Benin City, Nigeria.

Accepted 10 October, 2024

Abstract

The research was undertaken from 1997-2000 to investigate how forest policy has faired in meeting the set objectives in forestry contexts and development in study area. The result showed that deforestation and consolidation of forest reserves accounted for 73.64 and 3.10%, respectively. The result also revealed that there was significant difference in the participation of professional foresters and taskforce as well as regeneration and exploitation of forest resources (P<0.05). It also revealed that there were significant differences among the threats to forest protection (P<0.05) and further analysis with LSD identified trespass as the most dominant threats. The result also showed that the increase in employment, creation of man made forest and encouragement of private forestry accounted for 41.65, 19.85 and 10.19% respectively. It was observed that there was no significant difference among the various rates of decline of the forest estates under review.

Keywords: Policy evaluation, environmental protection, consolidation, exploitation, pervasive issues.
 

International Journal of Agroforestry and Silviculture ISSN: 2375-1096 Vol. 12 (1), pp. 001-006, January, 2024. © International Scholars Journals

Full Length Research Paper

Assessment of fallow and cover crops for nematode control in diverse agroecological zones of Southwestern Nigeria

J. A. Adediran*, A. A. Adegbite, T. A. Akinlosotu, G. O. Agbaje, L. B. Taiwo, O. F. Owolade, and G. A. Oluwatosin

Institute of Agricultural Research and Training, Obafemi Awolowo University, PMB 5029, Moor Plantation, Ibadan, Nigeria.

Accepted 25 October, 2023

Abstract

A study was conducted in three agroecological zones of south-western Nigeria to evaluate the effect of siam weed (Chromolaena odorata) and mucuna (Mucuna utilis) cover/fallow crops on plant-parasitic nematode population. The natural bush regrowth was used as control. Plant-parasitic nematodes were identified and counted during the fallow periods. Eleven genera of nematodes were identified and three (Meloidogyne, Pratylenchus, and Helicotylenchus) species were predominant across the trial locations. Other important genera present were Scutellonema, Tylenchorhynchus and Rotylenchus species. Nematode population densities of pre-crop were lowest in Alagba soil (Rhodic lixisols) at Ikenne in the wet forest zone of Nigeria. The populations in Iwo soil (Rhodic haplustalf) at Ibadan, a dry forest zone was lower than in the Temidire soil (Plinthic luvisol) at Ilora in the derived savannah of south-western Nigeria. There was significant suppression of nematode population densities under the different crops as the fallow period increased. The population reduction in the different locations depended on the nematode species and the cover crops. The natural bush re- growth had the least effect on the nematode suppression at the end of the fallow period. On the average, siam weed fallow reduced nematode population densities by 67-79%, mucuna by 64-72% and the natural bush by 30-49% across the trial locations. For effective nematode suppression with fallow cropping, proper determination of the principal nematode species predominant in an environment is essential.

Key words: Cover crop, fallow crop, nematode population, nematode species, nematode suppression, soil type.

International Journal of Agroforestry and Silviculture ISSN: 2375-1096 Vol. 12 (1), pp. 001-004, January, 2024. © International Scholars Journals

Full Length Research Paper

Biocontrol of Zonocerus variegatus population using Beauveria bassiana and Metarhizium sp.

O.E. Fagade¹, S.A. Balogun² and C.J. Lomer³

¹Environmental and Biotechnology Unit, Department of Botany and Microbiology, University of Ibadan, Ibadan, Nigeria.

²Environmental Microbiology Unit, Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Nigeria.

³International Institute for Tropical Agriculture, Biological Control and Functional Biodiversity Centre, BP 08-0932 Cotonou, Benin Republic.

Accepted 13 October, 2023

Abstract

Microbial control of caged populations of Zonocerus variegatus was carried out using indigenous fungal entomopathogens isolated from the grasshopper’s cadaver. Bioassay response indicated a dose-dependent mortality coupled with drastic reduction in food consumption among spores infected grasshoppers. Lethal time (LT₅₀) of 4.6 days for 10³ spores/ml and 3.8 days for 10⁷ spores/ml of oil formulation of Beauveria bassiana were observed. While Metarhizium sp recorded LT ₅₀ of 9.0 days and 2.8 days for 10³ and 10⁷ spores/ml, respectively. The results obtained were discussed in relation to use of the isolates in the control Z. variegatus infestation in forest agro-ecosystem of south west, Nigeria.

Key words: Microbial control, entomopathogenic fungi, Beauveria bassiana, Zonoccrus variegatus, Metarhizium sp.

International Journal of Agroforestry and Silviculture ISSN: 2375-1096 Vol. 11 (7), pp. 001-009, July, 2023. © International Scholars Journals

Full Length Research Paper

Identifying the factors influencing Anacardium Occidentale L. (cashew) survival at juvenile stage for the resilient and productive cashew-based agroforestry systems in Burkina Faso (West Africa)

Saye Traoré¹, Thomas Lamizana² and Ayub Djibo³

¹Institut de l’Environnement et de Recherches Agricoles (INERA), station de recherches environnementales et agricoles de Farako-Bâ, 01 BP 910, Bobo-Dioulasso, Burkina Faso

²Projet d’Appui au Développement de l’Anacarde dans le bassin de la Comoé pour la Réduction des Emissions dues à la Déforestation et la Dégradation des forêts (PADA-REDD+), 01 BP 337, Bobo-Dioulasso, Burkina Faso

³Université Joseph Ki-Zerbo, Ecole doctorale sciences et techniques, 03 BP 7021, Ouagadougou 03, Burkina Faso.

Accepted 28 March, 2023

Abstract

The cashew seedlings survival after planting is a major factor affecting the productivity of the cashew-based agroforestry systems. This research investigated the factors influencing the cashew seedlings survival at juvenile stage for the resilient and productive cashew-based agroforestry systems in Burkina Faso. Different cashew seedlings clones were planted in three field experiment plots in the south west region. The living, dead, stressed percentages and numbers of seedlings were evaluated after 15 months to assess the survival. The seedlings survival was sensitive to the rainfall, temperature and soil conditions and under the genetics factors control. The application of the good sylvicultural practices would improve the seedlings survival. The cashew adaptation to the rainfall, temperature and soil conditions was under the genetics factors control. The farmers training and awareness increase about the good sylvicultural practices and the intensification of the research for selecting and promoting the cashew clones that are adapted to the rainfall, temperature and soil conditions of the different regions of the cashew production could improve the seedlings survival contributing to the productive and resilient cashew-based agroforestry systems. Further research to investigate the cashew nuts production and quality of the clones is required to recommend the performant clones.

Keywords: improvement, genetics, ecophysiology, soil, climate.

International Journal of Agroforestry and Silviculture ISSN: 2375-1096 Vol. 11 (2), pp. 001-006, February, 2023. © International Scholars Journals

Review

Biotechnology, genetic conservation and sustainable use of bioresources

Uyoh E. A.¹, Nkang A. E.²* and Eneobong E.E.³

¹Department of Genetics and Biotechnology, University of Calabar, Nigeria.

²Department of Botany, University of Calabar, Calabar, Nigeria.

³School of Applied Sciences, Cross River State University of Technology, Calabar, Nigeria.

Accepted 17 November 2022

Abstract

The loss of Africa’s forests and bioresources is occurring at an alarming rate, a consequence of increasing population pressure, agricultural land degradation, urbanization and neglect. There is a growing recognition worldwide that conservation and sustainable management of bioresources are pressing priorities in the world today. The choice of conservation methods and techniques depend on the objectives of the particular conservation effort, the breeding system and behaviour of the species in question as well as the available resources including funds, trained personnel, infrastructure and technologies. The use of biotechnological tools and “bioprospecting” will open new vistas in medicine, agriculture, silviculture, horticulture, environment and other important issues. This paper reviews some biotechnological tools that could be harnessed in promoting conservation and sustainable use of bioresources.

Key words: Bioresources, genetic conservation, biotechnology.