Research Papers/Topics in Entomology

Effects Of Variety And Processed Forms Of Cassava Chips On The Development Ofprostephanhs Truncates (Horn) (Coleoptera: Bostrchedae) And Araeceriis Fa Sc 1c Ula Tl Fs (Degeer) (Coleoptera Ant

ABSTRACT Studies were earned out on the effects of variety and processed form of cassava chips on the development of Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) and Araecerus fasciculatus (Degeer) (Coleoptera: Anthribidae). Additionally, changes in the nutrient composition of the chips due to infestation, and the influence of major nutrients on the population parameters of these insects were also studied Statistical analysis of insect preference to the processed chips in a ...

Assessment Of The Damage Caused By Corcyra Cephalonica (Stainton) (Lepidoptera: Pyralidae) And Araecerus Fasciculatus (Degeer) (Coleoptera: Anthribidae) To Stored Cocoa Beans In Ghana

ABSTRACT The damage caused by Corcyra cephalonic a and Araecenus fasciculatus to cocoa beans was studied at the Research Department o f Quality Control Division o f COCOBOD, Tema. The study included breeding o f the two insects on cocoa beans to investigate the biology, fecundity and progeny production o f the two insect species. The free fatty acid level o f cocoa beans was also determined and the change in this level due to insect damage was calculated with respect to undamaged ones. ...

Investigations Into The Ecological Determinants of Distribution of Anopheles Gambaie S.S. (DIPTERA: CULICIDAE) Larvae Populations in Urban Accra,Ghana

ABSTRACT Anopheles gambiae s.s. larval habitats are important determinants of adult distribution and abundance, which also determines the geographical pattern of malaria disease. Information on their habitat characteristics can contribute greatly to better planning of its control strategies through environmental management. To identify the environmental parameters, which influence the distribution of An. gambiae s.s. larval populations in urban Accra, Ghana, 30 habitats with An. gambiae...

Resistance Mechanisms And Susceptibility to Organophosphates, Carbamates And Pyrethroids in Anopheles Gambiae S.L. GILES (DIPTERA: CULICIDAE) IN Hohoe District, Ghana.

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 ...

The Biology of Ceranisus Menes (WALKER) (HYM., EULOPHIDAE), A Parasitoid of The BEAN flower THRIPS MEGALUROTHRIPS SJOSTEDTI (TRYBOM) (THYS., THRIPIDAE): A Comparison Between African And Asian

Abstract Cowpea is an important food crop in Africa but suffers from a variety of insect pests. Among those is Megalurothrips sjostedti (Trybom), a major pest that is not successfully controlled by its local natural enemies. One of them, Ceranisus menes (Walker), a cosmopolitan endoparasitoid of thrips larvae provides efficient control of thrips populations in Southeast Asia. This has necessitated a study of this insect which involves a comparison of the biology of the African and Asian...

Studies On Damage By Prostephanus Tr Unca Tus(Jhorn) (Coleoptera: Bostrichidae) And Araecerus Fascicula Tus Pe G E E R ) (Coleoptera: Anthribidae) To Dried Yam Chips

In West Africa, especially Nigeria, Benin Republic, Togo and Ghana, dried yam chips constitute an important food material. The recent introduction of the larger grain borer into Africa and its devastating effect on cassava chips necessitated a study of the biology and damage caused by Prostephanus truncatus (Horn) (Coleoptera: Bostrichidea) and Araecerus fasciculatus (Degeer) (Coleoptera: Anthribidea) on dried yam chips in Ghana. Three yam varieties were investigated ...

A Search For Indigenous Parasitoids For The Control Of The Larger Grain Borer, Prostephanus Truncatus (Horn) (Coleoptera: Bostrichidae)

ABSTRACTThis study was conducted to identify indigenous parasitoids for the control of the larger grainborer, Prostephanus truncatus (Horn) (Coleoptera : Bostrichidae). A search was conducted atvarious market stores in the Greater Accra and Volta Regions to collect and identify parasitoidsassociated with stored product pests. Anisopteromalus calandrae (Howard)(Hymenoptera : Pteromalidae) and Dinarmus basalis (Rondani) (Hymenoptera : Pteromalidae)associated respectively with Sitophilus zeamais...

Control Of Prostephanus Trunca Tvs (Horn) (Coleoptera: Bostrichidae) Through The Treatment Of Wood Used For The Construction Of Maize Storage Barns

ABSTRACT The ability of the Larger Grain Borer (LGB), Prostephanus truncatus (Horn ). to bore and survive for several weeks in various wood materials led many pest control specialists to conclude that the quick and early build up of the pest in stores results from residual populations from previous infestation that survived in the wooden store structure. The relative susceptibility to P. truncatus infestation of five wood species: stems of borassus/fan palm (Borassus aethiopium (War...

Susceptibility Of Two Spotted Spider Mite Tetranychus Urticae Koch (Acari; Tetranychidae) To Some Selected Insecticide In The Greater Accra Region Of Ghana

ABSTRACT The two-spotted spider mite Tetranychus urticae is a pest of several plants including vegetables, fruits, ornamentals and field crops. Damage done to the host plant can cause leaf and fruit loss, complete defoliation and death of the host plant. They are mostly managed by the use of acaricides. Acaricides resistance has been reported in several countries, this is due to the fact that T. urticae fully becomes resistant to an insecticide after two to four years of use. The presen...

Field Evaluation Of The Bio-Efficacy Of Three Brands Of Pyrethroid-Based Mosquito Coils Against Anopheles Gambiae Sensu Lato, A Malaria Vector, At Pokuase In The Ga West District Of Greater A

ABSTRACT As a result of the increasing demand for the use of mosquito coils in Ghana, as a means of personal protection against Anopheles gambiae sensu lato, it was important to evaluate the effectiveness of three selected mosquito coils under field conditions and also determine the resistance status of Anopheles gambiae sensu stricto against pyrethroid-based mosquito coils. Three bands of pyrethroid-based mosquito coils; Angel Jumbo coil®, Lord Insecticide antimosquito coils® and Hea...

Insecticide Use Pattern, Residues In Soil And Water And Kjdr Resistance In Anopheles Gambiae S.L. On Rice Farms In Okyereko, Central Region.

ABSTRACT Indiscriminate use of insecticides in controlling insect pests of agricultural crops has been implicated in the development of resistance in disease vectors such as the Anopheles gambiae s.l Giles (Diptera: Culicidae) populations that breed within farming areas. Since vector control strategies are insecticide based, it is important to study insecticide resistance in farming areas such as irrigation sites where vectors are breeding. The aim of the study was to investigate insect...

Studies On The Biology And Activity Levels Of Carboxylesterase As An Indicator Of Insecticide Resistance In Populations Of Diamondback Moth, Plutella Xylostella (L.) (Lepidoptera: Plutellidae

ABSTRACTBiology of Diamondback moth, Plutella xylostella (L.) (Lepidoptera:Plutellidae) was studied in the laboratory under controlled conditions, i.e.28 ±1 °C, 65-70 % r.h and a photoperiod of 12L: 12D hours. The resultsindicated that the developmental time of P. xylostella from egg to adultemergence took on the average 17.5 days. About 59 % of the eggs were laidon the first night of oviposition. Additionally females were generally larger(5.0mm) than males (4.5 mm).Effects of temperature, ...

Host Plant Suitability Of The Papaya Mealybug, Paracoccus Marginatus Williams And Granara De Willink (Hemiptera: Pseudococcidae), And The Host Specificity Of Its Natural Enemy, Acerophagus Pa

ABSTRACTThe papaya mealybug Paracoccus marginatus Williams and Granara De Willink (Hemiptera: Pseudococcidae) is an invasive pest insect that can damage a wide range of agricultural crops. Successful biological control of this pest strongly relies on its mass rearing in order to produce its introduced natural enemy, Acerophagus papayae. Host susceptibility studies of P. marginatus were done on four different host plants: Manihot esculenta (cassava), Solanum macrocarpon (African egg-plant), Ve...

Effects Of Different Control Strategies On Maize Plant Recovery And Yield After Fall Armyworm Infestation

ABSTRACT The larvae of Fall Armyworm (FAW), Spodoptera frugiperda (J. E. Smith), (Lepidoptera:Noctuidae), can cause significant damage to crops such as maize if not well managed. The purpose of this study was to determine the levels of natural infestation of FAW along the phenology of maize under field conditions, investigate the critical stages for FAW control along maize phenology, and to ascertain the effect of different treatments on maize recovery and yield after FAW infestatio...

Characterisation Of Bemisia Tabaci (Gennadius) (Homoptera: Aleyrodidae) Biotypes Associated With Some Selected Crops In Southern Ghana.

ABSTRACT Intraspecific variation and biological heterogeneity in the whitefly Bemisia tabaci make it a major pest in diverse agricultural systems worldwide. The economic burden of this insect pest owes to its apparent polyphagy, vectorial capacity for viruses, and propensity for insecticide resistance development. Ecological specialisation has been observed in the species, which compounded with the variability, and adaptability pose serious impediments in its control. Effective descript...


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