• Korean journal of applied entomology
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• v.46 no.1 s.145
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• pp.123-129
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• 2007

An artificial insemination instrument of bumblebee queens was firstly developed. This instrument consists of location tube, transfer tube, holding tube, head product, and probe apparatus for reproductive tract etc. This instrument was designed to minimize stress and damage of reproductive tract of bumblebee queens. The regulator handle apparatus in artificial insemination instrument was used the principle of lever, that manipulates easy, accurate and rapid insemination of bumblebee queens. By using this instrument, the insemination rate was over 90%. This instrument will be useful for the breeding and conservation of excellent character of bumblebees.

• Korean journal of applied entomology
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• v.41 no.3
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• pp.191-197
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• 2002

Seasonal occurrence and visiting flowers species of overwintered bumblebee queens were investigated during the spring season of 2000. A total of 1,277 overwintered bumblebee queens were collected, consisting of seven species of Bombus and one species of Psithyrus. The dominant species were Bombus ardens Smith and Bombus ignitus Smith. The heydays of their occuring season were the early April for B. ardens and the second half of the May for B. ignitus. B. ignitus was mainly collected on Prunus yedoensis Matsumura and Corydalis speciosa Min, and B. ardens on the Rhodldendron mucronulatum Turcz and Prunus yedoensis.