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A Combination Method of Cold Treatment and CO2-Narcosis for Breaking Diapause of Bombus ignitus and Bombus terrestris Bumblebee Queens
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/287566
Bumblebees are important pollinators of crops and wildflowers. Bumblebees generally produce one generation per year. One of the key stages for year-round rearing of bumblebees is breaking diapause. To evaluate the effects of a combination method of CO2-narcosis and cold treatment to break the diapause of B. ignitus and B. terrestris queens, we determined whether this method affected their ability to establish a colony after the diapause break. The diapause treatment regimes that were utilized were CO2(CO2– narcosis), CT-1M(cold treatment at 5°C for 1 month), CT-1M-CO2(CO2–narcosis after cold treatment for 1 month), CT-2M-CO2(CO2–narcosis after cold treatment for 2 months), CT-2M (cold treatment for 2 months), CT-2.5M-CO2(CO2–narcosis after cold treatment for 2.5 months) and CT-2.5M (cold treatment at 5°C for 2.5 months). In view of the effects on the colony developmental characteristics of B. ignitus queens, the most favorable diapause treatment was CT-1M-CO2. A combination method of CO2– narcosis and cold temperature treatment yielded better results than that of single CO2–narcosis or cold temperature treatment on the colony development of diapause-broken B. ignitus queens. In the case of B. terrestris queens, we concluded that a combination method of CO2 and cold temperature treatment yielded better results than that of a single cold-temperature(up to2 months) treatment. In conclusion, the findings of the present study indicated that the combined application of CO2 and cold temperature was a favorable method for the colony development of diapause-broken B. ignitus and B. terrestris queens compared with only CO2–narcosisorcoldtemperaturetreatments. A combination method of CO2 and cold treatment reduced the side effect of CO2–narcosis and shortened the duration of cold treatment by at least 1month.
