著者

大石 毅 本間 淳 日室 千尋 照屋 清仁

出版者

日本応用動物昆虫学会

雑誌

応動昆 (ISSN:00214914)

巻号頁・発行日

vol.62, no.2, pp.123-126, 2018

被引用文献数

5

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<p>To improve the larval artificial diet in a mass-rearing system of <i>Euscepes postfasciatus</i>(Fairmaire), we compared the yield and quality of weevils reared on artificial diets containing different types and amounts of commercial sweet potato powder, using their current diet as the control(made from peeled tubers). We compared a diet containing the same amount of an alternative sweet potato powder(made from the peel of tubers), a diet containing half the amount of the alternative sweet potato powder, and a diet containing no sweet potato powder. The resulting numbers of emerged adults, mean male mass, and rate of sexually matured females did not differ significantly between the diets. Moreover, the mass of females reared on a diet with half the amount of alternative sweet potato powder showed no significant difference from those reared on the control. However, the males reared on the control transferred significantly less sperm than those reared on the other diets. These results indicated that the diet with half the amount of alternative sweet potato powder was superior in terms of yield, quality, and production cost in the weevil mass-rearing system.</p>

著者

照屋 清仁 大石 毅 鶴井 香織

出版者

日本応用動物昆虫学会

雑誌

日本応用動物昆虫学会誌

巻号頁・発行日

vol.61, no.1, pp.32-35, 2017

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<p>Prevention or reduction of infection by the neogregarine parasite <i>Farinocystis</i> sp. is indispensable for effective mass-production of the West Indian sweet potato weevil <i>Euscepes postfasciatus</i>(Fairmaire). The established method of weevil collection, coercively drawing weevils from the larval rearing cage, was suspected to increase the risk of breaking infected individuals, which causes horizontal transmission of the parasite to uninfected individuals. Here, we developed a novel collection method in which the weevils were permitted to spontaneously leave the larval rearing cage. The significant decrease in infection rate and the significant increase in the fecundity of weevils collected by the novel method suggested that this method may improve the mass-production of weevils.</p>