Assessement of Aqueous Plant Extract for the Control of Kola Weevils (Balanogastris kolae & Sophrorhinus spp) (Coleoptera: Curculionidae) in Stored Cola nitida
Journal Title: European Journal of Medicinal Plants - Year 2015, Vol 7, Issue 4
Abstract
Kola nuts do not undergo any other additional form of post harvest processing before storage and consumption, hence there is an urgent need to develop new post harvest storage pest control strategies that are safe, of low cost, convenient to use, and environmentally / user friendly. Water extracts from seven (7) medicinal plants including Nicotiana tabacum L., Vernonia amygdalina Delile, Eucalyptus camaldulensis Dehnh, Hyptis sauvolens Poit, Cymbopogon citrtus Stapf, Lantana camara L. and Musa paradisiaca L., were evaluated for their toxicity on kola we evils development and emergence in storage. The Balanogastris kolae development and emergence from treated stored kolanuts at the various treatment levels decreased with increased concentration of the extracts applied at 25% (7.08 – 14.63), 50% (6.70 – 12.70) and 100% (4.95 – 8.75). The mean numbers of adult Sophrorhinus spp emergence at 25% treatment level (0.33 – 0.40) was not significantly different (p > 0.05) from their control treatment (0.85). However, at 50% and 100% treatment levels, all the seven plant extracts achieved a low level of Sophrorhinus spp emergence (0.15 – 0.25) and (0.13 – 0.18) respectively, which was significantly (p < 0.05) different from their control (0.85). The mean number of weevil exit holes recorded for extracts of the various plants decreased with increased concentrations of the extracts applied 25% (30.85 – 41.67), 50% (21.93 – 30.60) and 100% (16.83 -28.10). The few colour changes recorded in the stored kola nuts did not increase with the increased concentration of the extracts 25% (0.75 – 3.05), 50% (0.23 – 3.35) and 100% (0.95 – 2.48). The 7 aqueous extracts can be used at 50% and 100% treatment levels to minimally reduce the menace of kola weevils.
Authors and Affiliations
E. U. Asogwa, T. C. N. Ndubuaku, O. O. Awe, I. U. Mokwunye
Keywords
Related Articles
- EP ID EP350093
- DOI 10.9734/EJMP/2015/13462
- Views 101
- Downloads 0
In vitro Antibacterial Activity of Aqueous Extracts of Cashew (Anacardium occidentale L.) Fruit Peels Using Bioautography Method
Aims: Bark, leaves and gum of cashew (Anacardium occidentale L.) have been reported to be effective in curtailing the growing problems of resistance of bacterial pathogens. The in vitro activity of aqueous extracts of ca...
Paulownia as a Medicinal Tree: Traditional Uses and Current Advances
Paulownia is one of the most useful and sought after trees, in China and elsewhere, due to its multipurpose status. Though not regarded as a regular medicinal plant species, various plant parts (leaves, flowers, fruits,...
Investigation of Antioxidant Potential of Methanolic Extract of Swertia chirata Buch. Ham.
Aim: To evaluate the in vitro antioxidant potential and total phenolic contents of the methanolic extract of Swertia chirata. Place and Duration: Department of Botany, Dr. H. S. Gour University (HSGVV), Sagar, between Fe...
Medicinal Plants Used in Alternative Medicine to Treat Cancer in Bukavu
Current modern anticancer therapies are costly, inaccessible and even unavailable for poor populations living in resources-limited countries. The alternative way of treatment consists of using herbal remedies offered by...
Antidiabetic Activities of the Aqueous Root Bark and Flower Extracts of Terminalia catappa on Streptozotocin - Induced Diabetes in Male Wister Rats
Diabetes mellitus is a disease associated with the increase in Blood glucose level caused by the abnormalities of glucose receptors in the uptake of glucose or total destruction of the β pancreatic cell, with approximate...