Vol. 5, Issue 5 (2020)
Study of the reproductive parameters of Corcyra cephalonica (Stainton) according to the type of food substrate
Author(s): Mamadou LO, Toffène Diome, Cheikh Thiaw, Mbacké Sembene
Abstract: Rice is a cereal strategy for Senegal given its place in the household and its weight on our trade balance. Imports of rice amounted in 2013 to 902526 tonnes worth of more than 191 billion CFA francs. In Africa, 70% of the production of mils comes from the west of the continent. Thus, it becomes imperative to pay more attention on the stocks of these cereals, which are often attacked by insect pests such as Corcyra cephalonica, to ensure the food security of the country. It is in this context that this study aims to determine the effect of the substrate on the reproduction of C. cephalonica. To achieve this objective, samples were collected in a packing station of the seed of Senegal, located in the centre of the groundnut basin in order to establish a mass rearing. Eggs from moths female from this breeding, were used to conduct tests necessary for the study of the reproductive potential of the moth. The results obtained showed that the difference of ranks between the number of egg-laying in the grain was significant (p-value = 0,0090 < 0,05), between the eggs laid in the grain was also high (p-value = 0,0237 < 0,05). However, the difference of rank between the hatch rates of eggs in the grains was not significant (p-value = 1 > 0,05). On the other hand, tests of correlations revealed that there was no relationship between the total number of eggs laid on mil and the longevity of female mites (Sig.= 0,904 > 0,05), the number of oviposition and the total number eggs laid on mil (Sig.= 0,785 > 0,05), the number of oviposition and the total number of eggs laid on rice (Sig.= 0,188 > 0,05), the total number of eggs laid on mil and the longevity of the moths on rice (Sig.= 0,589 > 0,05), the total number of eggs laid on mil and the total number of eggs laid on rice (Sig.= 0,742 > 0,05). However, there is a strong correlation between the total number of eggs laid on rice and the longevity of female mites on rice (Sig.= 0,021 < 0.05 and Spearman Correlation coefficient = 0,878).