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  • Title: Managed and Wild Bee Flower Visitors and Their Potential Contribution to Pollination Services of Low-Chill Highbush Blueberry (Vaccinium corymbosum L.; Ericales: Ericaceae).
    Author: Campbell JW, Kimmel CB, Bammer M, Stanley-Stahr C, Daniels JC, Ellis JD.
    Journal: J Econ Entomol; 2018 Sep 26; 111(5):2011-2016. PubMed ID: 30010801.
    Abstract:
    Highbush blueberry (Vaccinium corymbosum L.; Ericales: Ericaceae) is an important crop grown throughout the eastern United States and Canada. Cross-pollination by insects greatly enhances pollination and fruit set in highbush blueberry. In Florida, low-chill cultivars that flower during the winter when most bees are dormant are used, thus, making it difficult to utilize and depend on unmanaged bees. We investigated flower visitation rates by managed and wild bees and the subsequent berry formation, berry weight, and number of seeds/berry in highbush blueberry fields in north-central Florida. Additionally, we tested three pollinator treatments: 1) pollinator-excluded flowers, 2) open-pollinated treatments that were available to managed and wild bees, and 3) flowers that were hand pollinated. Overall, we found seven native bee species that contribute to highbush blueberry pollination in Florida, but managed honey bees and bumble bees were the main flower visitors. Additionally, 14.5 times more blueberries formed in the open treatments than in the pollinator exclusion treatments, thus illustrating the economic impact bees have on blueberry pollination. Most of the wild bees observed visiting blueberry flowers were ground-nesting species that need uncultivated areas for nesting sites. Therefore, leaving field edges uncultivated and some undisturbed habitat may increase native bee numbers within blueberry farms over time.
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