Article Sidebar
Article Details
NAJ supports free online communication and exchange of knowledge as the most effective way of ensuring that the fruits of research and development practice are made widely available. It is therefore committed to open access, which, for authors, enables the widest possible dissemination of their findings and, for readers, increases their ability to discover pertinent information. The Journal adopts and uses the CC: BY license and is open access. This license lets others distribute, remix, adapt, and build upon your work, even commercially, as long as they credit you for the original creation. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the Journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work. Copyright for articles published in this Journal is retained by the Journal.
Main Article Content
EVALUATION OF SOME BIO-PESTICIDES FOR THE CONTROL OF YAM TUBER ROT
Abstract
pathogens in Ebonyi State in 2017 cropping season. The laboratory study involved isolation and identification of
fungi associated with rots in yam tubers. The test fungi isolates include: Penicillium spp, Aspergillius spp,
Botryodiplodia thebromae, Rhizopus stolonifer, and Trichoderma spp were used for pathogenicity test on healthy
yam tubers. The effects of plant extracts of garlic, ginger and moringa were used for the inhibition of growth of
fungi isolates using pour plate technique. Data collected were subjected to one-way analysis of variance using the
SPSS statistical package and mean separation carried out using DMRT at p<0.05. The main rot causal
microorganism identified in stored yams was Botryodiplodia theobromae, which also had the least inhibition at
43.0% due to its virulence. Garlic extract showed the highest anti-microbial effect against all the test fungi,
especially on Trichoderma spp. at 89.8% and Panicillium spp. at 83.9%, followed by ginger extract on
Penicillium spp. at 68.7% and Aspergillius spp at 54.1%, moringa extract on Penicillium spp at 71.0% and
Aspergillius spp at 55.9%. All the extracts at 100% concentration inhibited the five fungi isolates with Penicilium
spp at 78.4%, Aspergillius spp. at 69.6%, Botryodiplodia theobromae at 37.5%, Rhizopus stolonifer at 40.5% and
Trichoderma spp at 62.5%, which was significantly different from the results at 90% concentration. Thus, water
based extraction technique was an effective method in inducing anti-fungal properties of garlic, ginger and
moringa extracts. This research findings concludes that garlic, ginger and moringa extracts at 100%
concentration possess anti-fungal properties to control fungal pathogens responsible for yam rots in Ebonyi
State.
