Biocidal Effect of Leaves of <i>Crataeva religiosa</i> Forst on a Resistant Strain of Groundnut Bean <i>Caryedon serratus</i> (Olivier)

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.

Biocidal effect of bio art biological product against Caryedon serratus (Olivier, 1789), seed pest in peanut stocks in Senegal

“…The sex ratio is in favour of females except for the lowest dose C3 where males are more numerous, which would increase the risks of population growth and competition between males in the second case. The same trend is observed with the work of Gningue et al [22], where the sex ratio is in favour of females of C. serratus with the application of A. indica extracts.…”

“…From these results, we can conclude that the predominance of females would increase the risks of population increase in stored seeds, hence the importance of damage in storage areas. The same trend is observed with Gningue et al [22], where the sex ratio is in favour of females with the application of A. indica extracts on C. serratus.…”

Comparative biocidal effect of BioArt and Crataeva religiosa extracts against the groundnut seed pest Caryedon serratus (OL.) in Senegal

“…From these results, we can conclude that the predominance of females would increase the risk of populations increasing in stored seeds, hence the importance of damage in storage areas. The same trend was observed with Gningue et al [17] and Thiaw [18], where the sex ratio was in favour of females with the respective application of A. indica and C. procera extracts on C. serratus.…”

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“…For the C2 dose, the effect is in favor of males, leading to a competition between males. The opposite effect was observed in the work of Gningue et al[16], where the sex ratio was in favor of males for doses C1 and C2; females for dose C3 with the application of C. religiosa extracts.Studies on the evolution of the adulticidal activity of C. religiosa extracts revealed mortality rates that varied according to the concentration and duration of the treatment. It showed an adulticidal efficacy between 46.66 and 53.33% with the application of all doses.…”

“…From these results, we can conclude that the predominance of females would increase the risks of population increase in stored seeds, hence the importance of damage in storage areas. The work of Gningue et al[16], shows a sex ratio in favor of males with the application of C. religiosa extracts on C. serratus.…”