We investigated the distribution, sex ratio, natural enemies, and nesting competition insects of mason bees, Osmia spp. in 32 apple orchards during 2006 to 2008. The rate of bee nested was 14.0±1.7%, and "Yeongju" and "Chungju" were the highest rate of nested among 10 locations, which were 2 times ...
We investigated the distribution, sex ratio, natural enemies, and nesting competition insects of mason bees, Osmia spp. in 32 apple orchards during 2006 to 2008. The rate of bee nested was 14.0±1.7%, and "Yeongju" and "Chungju" were the highest rate of nested among 10 locations, which were 2 times higher than average rate of nested. The rate of fauna nested were 66.0% for Osmia spp., 21.7% for natural enemies and 11.6% for nesting competition insects. We collected five species of Osmia spp. consisting of Osmia cornifrons, O. pedicornis, O. taurus, O. satoi and O. jacoti. In case of collected five Osmia spp, O. cornifrons was 69.6%, which was the dominant species and O. pedicornis was 13.0% and O. taurus was 11.2%, respectively. The collecting rate of Osmia spp. was significant difference among each year and 10 locations. The sex ratio of Osmia spp. were 1:1.9 in O. cornifrons, 1:5.1 in O. pedicornis and 1:2.2 in O. taurus. The sex ratio of O. cornifrons was significant difference among each year and 10 locations. Seven species of natural enemies that attack Osmia spp. were collected in apple orchard. Trogoderma and Chaetodactylus showed the highest rates with 48% and 38% among 7 natural enemies. Also, we collected nine species of nesting competition insects. Anterhynchium flavomaginatum showed the highest rates with 38.6% among 9 nesting competition insects.
We investigated the distribution, sex ratio, natural enemies, and nesting competition insects of mason bees, Osmia spp. in 32 apple orchards during 2006 to 2008. The rate of bee nested was 14.0±1.7%, and "Yeongju" and "Chungju" were the highest rate of nested among 10 locations, which were 2 times higher than average rate of nested. The rate of fauna nested were 66.0% for Osmia spp., 21.7% for natural enemies and 11.6% for nesting competition insects. We collected five species of Osmia spp. consisting of Osmia cornifrons, O. pedicornis, O. taurus, O. satoi and O. jacoti. In case of collected five Osmia spp, O. cornifrons was 69.6%, which was the dominant species and O. pedicornis was 13.0% and O. taurus was 11.2%, respectively. The collecting rate of Osmia spp. was significant difference among each year and 10 locations. The sex ratio of Osmia spp. were 1:1.9 in O. cornifrons, 1:5.1 in O. pedicornis and 1:2.2 in O. taurus. The sex ratio of O. cornifrons was significant difference among each year and 10 locations. Seven species of natural enemies that attack Osmia spp. were collected in apple orchard. Trogoderma and Chaetodactylus showed the highest rates with 48% and 38% among 7 natural enemies. Also, we collected nine species of nesting competition insects. Anterhynchium flavomaginatum showed the highest rates with 38.6% among 9 nesting competition insects.
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