Decreased bacterial contamination of artificial diet of the West Indian sweetpotato weevil, Euscepes postfasciatus (Coleoptera: Curculionidae), by eliminating eggs sinking into the saltwater before egg inoculation.

概要

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Our recent study revealed that the majority of Euscepes postfasciatus eggs that sink into 14% saltwater were dead. We examined the effect of eliminating the eggs sinking into the saltwater before egg inoculation on the bacterial contamination of the artificial diet of the species. The mean rate of contamination when the sunken eggs were eliminated (51%) was significantly lower than that when sunken eggs were not eliminated (60%). The contamination rate of the diet was 2% when the eggs were not inoculated, which is much lower than that when the eggs were inoculated in the absence of sunken eggs. Although eliminating the sunken eggs alone could not sufficiently suppress the contamination, we considered that this method could be used as one of the useful techniques for integrated management of bacterial contamination in the artificial rearing of E. postfasciatus.
九州病害虫研究会の論文