Journal
JOURNAL OF APICULTURAL RESEARCH
Volume 59, Issue 1, Pages 77-87Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00218839.2019.1654062
Keywords
Solitary bee; sweet cherry; fruit set; fruit quality; Osmia bicornis; pollination
Categories
Funding
- Biotechnology and Biological Sciences Research Council (BBSRC) CASE Award [BB/M503447/1]
- BBSRC [BB/M503447/1] Funding Source: UKRI
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The impact on pollination of supplementing wild pollinators with commercially reared Osmia bicornis in commercial orchards growing the self-fertile sweet cherry variety Stella was investigated in each of two years. The quality characteristics used by retailers to determine market value of fruit were compared when insect pollination was by wild pollinators only, or wild pollinators supplemented with O. bicornis released at recommended commercial rates. No effect of treatment on the number of fruit set or subsequent rate of growth was recorded. However, supplemented pollination resulted in earlier fruit set when compared to pollination by wild pollinators alone and offered the potential benefit of a larger proportion of the crop reaching optimum quality within a narrower time range, resulting in more consistent produce. Retailers use five key quality criteria in assessment of market value of cherries (the weight of individual fruit, width at the widest point, fruit colour, sugar content and firmness). Price paid to growers depends both on meeting the criteria and consistency between fruit in these characteristics. In both years, the commercial criteria were met in full in both treatments, but harvested fruit following supplemented pollination were consistently larger and heavier compared to those from the wild pollinator treatment. In the year where supplemented pollination had the greatest impact on the timing of fruit set, fruit size and sugar content were also less variable than when pollination was by wild species only. The implications for the commercial use of O. bicornis in cherry orchards are considered.
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