Daniel Kosini

• PhD
• Senior Lecturer at Faculty of Medicine and Biomedical Sciences of the University of Ngaoundere

Aims: This study was conducted to evaluate the insecticidal effects of aqueous extracts from Carica papaya, Tithonia diversifolia, and Strychnos spinosa leaves on Aphis gossypii population density and Apis mellifera foraging activity in an experimental field of Capsicum annuum. Study Design: The trials were arranged in a completely randomized block...

Synthetic pesticides present risks of pollution of the environment, humans and livestock and the alternative proposed today is to use botanical extracts in the fields against crop pests. But in North Cameroon, little information exists concerning the effect of these extracts on useful pollinating insects in general and no information exists in part...

The protection of foodstuffs against insect pests constitutes a serious problem across the world. Synthetic chemical insecticides are the most widely used method for grain protection. Unfortunately, the harmful effects of these insecticides on human health and environment have increased the interest of researchers for botanical insecticides which a...

The impact of aqueous extracts from the leaves of Callistemon rigidus, Lippia multiflora and Plectranthus glandulosus on the foraging behavior of Apis mellifera on Glycine max flowers were evaluated in Ngaoundéré Cameroon, during two successive agricultural seasons. The search was conducted in 1064 m2 experimental field with treatments arranged in...

Introduction. Recently in 2017, the WHO estimated the incidence of HIV-Tuberculosis co-infection at 99 cases per 100,000 inhabitants with an estimated death rate of 43%. A better knowledge of the aspects relating to this co-infection will help to fight and stop its progression. The study of the epidemiological, clinical, and biological profile of c...

Cowpea plants are damaged by insects in North-Cameroon. During ecological survey (2021 and 2022) in 44 plots of 4x3.5 m each, insects were captured on stems, leaves, flowers and pods, stored in vials containing 70° alcohol, identified in laboratory and the community structure was characterized. We captured 26,015 adults belonging to six orders, 13...

Aims: Because of the problems in agroecosystems following the anarchic use of synthetic insecticides, studies propose an alternative, the use of botanical biopesticides against pests. Study Design: The present study was conducted to evaluate (1) the potential of leaf extract of Calotropis procera (Gentianales: Apocynaceae), Eucalyptus camaldulensis...

There is a frightening decline in the population pollinators around the world due to the over usage of synthetic pesticides, leading to the directly reduce of plant production. Plant extracts with insecticidal properties could be eco-friendly alternatives to synthetic pesticides in maintaining the pollinator population and the diversity of the ecos...

One of the most important global problems is protecting food from insect pests. The negative effects of synthetic insecticides on human health led to a resurgence of interest in botanical insecticides due to their minimal ecological side effects. Therefore, the insecticidal potential of hexane, acetone, and methanol extracts of Gnidia kraussiana Me...

The response of pests to the effects of a botanical insecticide can vary spatially and temporally. To test whether efficacy of botanicals differed spatially, the insecticidal efficacy of Gnidia kaussiana and Ocimum canum against Callosobruchus maculatus was investigated in two different agro-ecological zones of Cameroon, i.e. Maroua and Ngaoundéré...

Aims: This research aimed at selecting indigenous Bambara groundnut varieties with high nutritional value and inherent resistance to insect attack for cultivation in sudano-sahelian (SS) and sudano-guinean (SG) zones of Cameroon. Study Design: The susceptibility of varieties to insect attack was assessed by adopting the standard evaluation of Dobie...

Aims: This research aimed at selecting indigenous Bambara groundnut varieties with high nutritional value and inherent resistance to insect attack for cultivation in sudano-sahelian (SS) and sudano-guinean (SG) zones of Cameroon. Study Design: The susceptibility of varieties to insect attack was assessed by adopting the standard evaluation of Dobie...

There is a need to improve research and extension documentation to assist farmers in making better use of the available resistant cowpea genotypes to insects attack during storage. A study was conducted to determine the resistance of ten cowpea genotypes [Vigna unguiculata (L.) Walp.] to Callosobruchus maculatus F. attack in the Sudano-Guinean and...

There is a need to improve research and extension documentation to assist farmers in making better use of the available resistant cowpea genotypes to insects attack during storage. A study was conducted to determine the resistance of ten cowpea genotypes [ Vigna unguiculata (L.) Walp.] to Callosobruchus maculatus F. attack in the Sudano-Guinean and...

Biological investigations were conducted at the laboratory of Applied Zoology, University of Ngaoundere, Adamawa Region between August 2016 to March 2017. The aim of this research was to evaluate the insecticidal and protectant efficacy of Cameroonian Hemizygia welwitschii leaf powder against Callosobruchus maculatus and Sitophilus Zeamais and germ...

The present study was carried out to evaluate the insecticidal, protectant and repellent potentials of hexane, acetone and methanol extracts of leaves of Ocimum canum Sims (Lamiaceae) against Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae). 【Methods】 Cowpea and soybean were coated with extracts from O.canum at dosages of 1 and 5 g/kg grai...

Biological investigations were conducted at the laboratory of Applied Zoology, University of Ngaoundere, Adamawa Region between August 2016 to March 2017. The aim of this research was to evaluate the insecticidal and protectant efficacy of Cameroonian Hemizygia welwitschii leaf powder against Callosobruchus maculatus and Sitophilus Zeamais and germ...

Experiments were conducted to determine the host preference of cowpea weevils Callosobruchus maculatus F. (Coleoptera: Chrysomelidae) using three pulses (Vigna unguiculata (L.) Walp., Vigna subterranea (L.) Verdc and Glycine max (L.) Merr.) and the susceptibility of these seeds to the beetle. Susceptibility was assessed using parameters like fecu...

The weevil, Sitophilus zeamais (Motschulsky), is a devastating pest of stored maize, especially in the warm humid tropical regions. The objective of this study was to test the insecticidal properties of fractionated Ocimum canum and Laggera pterodonta extracts used as natural alternatives to synthetic insecticides in the management of maize S. zeam...

Hexane, acetone, and methanol extracts from Gnidia kaussiana Meisn (Thymeleaceae), each at two dosages (0.2 and 1 ml/50 g grains corresponding, respectively to 1 and 5g/kg), and neem seed oil (NSO), used as standard insecticide were evaluated for repellence, toxicity to Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae) adults, F1 progeny in...

Aims: This research aimed at selecting indigenous Bambara groundnut varieties with high nutritional value and inherent resistance to insect attack for cultivation in sudano-sahelian (SS) and sudano-guinean (SG) zones of Cameroon. Study Design: The susceptibility of varieties to insect attack was assessed by adopting the standard evaluation of Dobie...

Botanicals could be eco-friendly alternatives to chemical pesticides in stored product protection. Ocimum canum leaf powder was sequentially extracted in hexane, acetone and methanol, and the fractions were tested for their potential in protecting stored Bambara groundnut seeds against the infestation of Callosobruchus maculatus. Bambara groundnut...