Abstract
Groundnut (Arachis hypogaea L.) is a legume that is highly coveted by West African populations, particularly those in Senegal. However, it suffers enormous damage caused by a bruchidae beetle, Caryedon serratus. This lust rests on its richness in proteins, calories and the absence of major constraints for its production. Losses recorded can reach 83% for a period of 4 months of storage. To counter this damage, several authors have looked for alternative methods to the use of synthetic insecticides, often harmful to animal populations and the environment. In this logic, we tested the biological impact of a leaf-based formulation of plants indigenous to Senegal (Crateva religiosa) on the external forms of C. serratus. In this study, analysis of the biological parameters of strain C. serratus showed low adult mortality of C. serratus. On the other hand, the extract affects the viability of eggs and larvae and fertility is reduced. The effect of the C. religiosa plant also results in reduced fertility of surviving females and a sex ratio in favor of the males causing a risk of decreasing population growth. On the other hand, there is an extension of the total development time.
Highlights
Peasant agriculture occupies 60% of the active population and contributes 20% of GDP
In the face of the threat posed by insects, which are the main pests of stocks, farmers often resort to synthetic insecticides, which have a great deal of adverse effects, including the selection of resistant strains [5], poisoning, environmental pollution, environment and the reluctance of consumers to consume products treated with pesticides [6]
The specific purpose of this study is to evaluate the biocidal effect of aqueous extracts formulation of C. religiosa on adults of C. serratus
Summary
Peasant agriculture occupies 60% of the active population and contributes 20% of GDP. In the face of the perverse effects of synthetic insecticides, several authors today will rely on traditional methods of insect control, by the search for natural substances of plant origin adapted to the reduction of insect-induced damage without endangering the population and the environment [7] [8] [9] [10]. It is in the context of reducing groundnut postharvest losses by alternative methods of traditional control, that we put in place an effective and applicable pest management method. The aim of this study is to evaluate the biocidal effect of Crataeva religiosa on the main pest of peanuts, Caryedon serratus
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