Abstract
In Senegal, millet (Pennisetum glaucum (L.) R. Br.) and rice (Oryza sativa (L., 1753)) are the most widely consumed foods. This study is part of improving the conservation of these two cereals in Senegal by assessing the quantitative and qualitative losses caused by a lepidopteran, Corcyra cephalonica (Stainton) subservient to millet and rice stocks. For this purpose, samples of millet and rice from an area of the center of the groundnut basin (Diourbel) were collected, sterilized in the cold and infected with C. cephalonica eggs from the same locality. These infected samples were tracked during a development period of two successive generations. The samples were scrutinized before being infected and after a larval cycle of codling moth. The results showed that rice grains are richer in water (10.75% ± 0.4249%, on average) than millet (9.40% ± 0.3944%, on average) and the difference in rank is very significant (p-value = 0.0001 Moreover, the attack percentage on millet grains is three times higher (36.31% ± 25.18%) than rice (12.95% ± 6.69%) with a non-significant difference (p-value = 0.296 > 0.05). A similar trend is observed at the loss percentage, which is four times higher with millet grains (8.67% ± 5.07%) than rice (2.86% ± 2.75%) with a non-significant difference (p-value = 0.835 > 0.05). A multiple linear regression showed a generation effect on millet for the attack percentage and a generation and cereal effect for the percentage of weight loss on rice.
Highlights
Losses occur at all stages, from harvesting to consumption: first at the producer, whether they are products for self-consumption, seed or waiting to be marketed; during transport to storage locations and during storage; in the reserves of traders
The water content of millet and rice grain samples was determined and the results showed that the highest water content was obtained with rice grains ranging from a minimum of 10% to a maximum of 11.50% and an average of 10.75% ± 0.4249%, and the lowest on millet grains ranged from 8.5% to 10% with an average of 9.40% ± 0.3944%
Losses Caused by C. cephalonica on Millet and Rice Stocks
Summary
Losses occur at all stages, from harvesting to consumption: first at the producer, whether they are products for self-consumption, seed or waiting to be marketed; during transport to storage locations and during storage; in the reserves of traders. Governments in developing countries, as well as many international NGOs, bilateral and multilateral cooperation organizations, and FAO in particular, have been engaged for several years in projects aimed at preventing food loss Experiences gained through these interventions have often highlighted the need to improve production processes, and to raise awareness among producers and interested institutions about the problem of post-harvest losses [2]. We find those which draw relevant attention and step in post crops stage Their infest is at the beginning the cause of enormous qualitative losses as well as quantative noted in warehouses or storage places so reducing to almost nothing all effort devoted to the production [3]. How can we reliably assess the losses of C. cephalonica grains due to insects on millet and rice dur-
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