ABSTRACT This study sought to determine the most effective concentration and favourable temperature at which Methanol and Diethyl ether extracts of Eucalyptus sp leaf are most effective in the control of Sitophilus zeamais in stored maize. Bioassay on efficacy of Methanol and Diethyl ether extract of Eucalyptus sp leaf was carried out with 4 treatment concentrations of 0.2%, 0.4%, 0.8% and 1.2% dissolved in acetone at 0.5 g/L of solvent. The extract was replicated three times and stored at te...
ABSTRACT The effect of different soil amendment strategies, and neem products for the management of insect pests of okra was studied in the field at the Ashaiman irrigation project site. The insect pests encountered fell into seven orders belonging to twenty-three families. The important ones among these were Aphis gossypii (Glov.), Bemesia tabaci (Genn.), Dysdercus spp. Podagrica uniformis (Jac.), Heliothis armigera (Hb.) synonym Helicoverpa armigera (Hb,), Sylepta derogata (Fab.), Anthonomu...
ABSTRACT The effect of Neem Seed Water Extract (NSWE) on insects and growth performance of eggplant (local garden egg) was evaluated in the field from June to October 1998 at Ekoso in the Eastern region, Ghana. The extract was applied at the rate of 75 g of seed per litre of water and compared with a standard insecticide (Karate), a registered Bacillus thuringiensis Berl. (Biobit) and water only as control. The effect of each treatment on leaf, shoot and fruit damage caused by defoliators, sh...
ABSTRACT Livestock are important contributors to food production in Ghana, providing meat, milk and a source of income for many. Rearing of livestock is practiced by the majority of the farming communities in which they are considered as an investment and insurance against risk and to meet seasonal and emergency purchases such as food crop, improved seed, fertilizers and medicine. However, production of animals is constrained by compound effects of parasitic infestation, diseases, poor feedin...
Abstract Resistance to the cowpea aphid is important component of integrated pest management of cowpea cropping systems most especially at the vegetative stage. The objective of this study was to demonstrate the effectiveness of the aphid resistance locus identified in advanced breeding line SARC 1-57-2 in reducing damage from the cowpea aphid in Ghana. Using an F2 population developed from Apagbaala x SARC 1-57-2, the resistance locus was tagged with the SSR marker CP 171F/172R with a recom...
ABSTRACT Cocoa is one of the most important cash crops in West Africa especially Ghana. It contributes 23% of the foreign export earnings from the agricultural sector in Ghana. Cocoa beans are fermented and dried before exporting. The fermentation period in Ghana is 6 to 7 days but some cocoa farmers under-ferment their cocoa beans leading to the development of purple cocoa beans. This study was carried out at CRIG and African Regional Postgraduate Programme in Insect Science (ARPPIS) at the ...
ABSTRACT Extracts of two indigenous Ghanaian medicinal plants Clausena anisata and Hyptis spicigera were bioassayed against housefly (Musca domestica L.) and cockroach (Periplaneta americana (L)) for various insect control activity. The extractives bioassayed were the petroleum ether and methanol extracts and essential oil of the plants. The lethal toxicity of the plant extractives were bioassayed using topical application and petri dish residual method against adult flies and cockroach nymph...
ABSTRACT The temporal distribution of four important cocoa mirid species (Distantiella theobroma Dist, Sahlbergella singularis Hagl, Helopeltis bergothii and Bryocoropsis laticollis) was studied in three differently managed cocoa farming systems from May 2013 to April 2014. In addition, the incidence of Bathycoelia thalassina, Characoma stictigrapta, Anomis leona, Earias biplaga, Eulophonotus myrmeleon, Oecophylla longinoda and Crematogaster africana, were recorded. The three systems were: Or...
ABSTRACT Surveys were conducted to identify the natural enemies of the oil palm leafminer, Coelaenomenodera lameensis Berti and Mariau (Coleoptera: Chrysomelidae). Different developmental stages were recovered from infested leaflets and reared for the emergence of parasitoids. Four parasitoids all belonging to the order Hymenoptera and family Eulophidae were identified. They were Neochrysocharis species, Chrysocharis species, Pleurotroppopsis species and Apleurotropis species. Parasitism on C...
ABSTRACT A study was conducted to develop a quick and efficient laboratory mass-rearing method for the cocoa aphid Toxoptera aurantii (Boy) and to screen cocoa genotypes for their resistance to the aphid. In a similar experiment, two cocoa genotypes were screened to determine their level of attractiveness to the cocoa capsid Sahlbergella singularis Hagl and the results compared with those from the aphid study. The study formed part of an on-going programme being conducted by the Cocoa Researc...
ABSTRACT Studies were conducted on some aspects of the biology of Chilo aleniellus (Strand) and Sesamia nonagrioid.es botanephaga Tams and Bowden in Southern Ghana. The life cycle of S. n. botanephaga revealed 8 developmental stages; the egg, 5 larval instars, a prepupa and a pupa. Female S. n. botanephaga was found to lay 330 ± 17.7 eggs within a period of 5 days. She required three surfaces to lay her eggs, which were mainly deposited, on the inner side of the leaf sheath fitting tightly...
ABSTRACT Thrips are crop pests causing damage to a wide range of crops ranging from fruits to vegetables to ornamentals through direct feeding or oviposition on plants. The main objective of this study was to determine the species composition of thrips and their host range in some selected parts of Greater Accra and Eastern Regions of Ghana. Thrips were collected from flowers, leaves and twigs of vegetable, ornamental and tree crops by beating and jarring and identified to species level. Fi...
ABSTRACT The efficacy of Waste Brewers‟ Yeast (WBY) + Imidacloprid (Akape® ) (insecticide) as food bait was compared with the novel fruit fly food bait, commercially available as SUCCESS APPAT® (GF-120) in the field as attractants for the management of fruit flies in mango orchards at the Coastal Savanna ecological zone for two major seasons (2010/2011 and 2011/2012). Randomised Complete Block Des...
ABSTRACT Malaria is a threat to more than 40% of the world's population accounting for more than 300 million acute cases and between 1.1 and 2.7 million deaths annually. Over 90% of the malaria cases are in sub-Saharan Africa, constituting 10% of the total disease burden. Currently activities support the extensive use of insecticide treated materials for malaria control. However these efforts are threatened by the evolution of resistance in the main malaria vectors, Anopheles gambiae s.l. tow...
ABSTRACT The rapid increase in bed bug resistance to pyrethroids call for the development of novel control strategies. Products combining pyrethroids and neonicotinoids have become very popular for bed bug control in Ghana and around the world. However, concerns about evolution of resistance to these compounds have been scantly reported in Ghana. Over the years, various control measures have been employed to control bed bug populations of which chemical insecticides are the most common metho...