<div dir="ltr"><i>Habrapoda laboriosa</i> is a native bee that is important for pollination of SE blueberry crops. This paper suggests that it is bee species diversity is important too.<div><br></div><div><a href="http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0097307">http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0097307</a><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 9, 2015 at 1:34 PM, Clement Kent <span dir="ltr"><<a href="mailto:clementfkent@gmail.com" target="_blank">clementfkent@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>Cranberries: Broussard et al 2011 (<a href="http://hortsci.ashspublications.org/content/46/6/885.short" target="_blank">http://hortsci.ashspublications.org/content/46/6/885.short</a>) found honeybees and bumblebees in cultivated cranberries in a 2:1 ratio but pollen collection was in a 1:2 ratio. In other words, if pollen collected predicts pollinator impact, bumblebees and honeybees were about even in this study.<br><br></div>Blueberries: Buzz pollination is important in highbush blueberries, and bumblebees are therefore more effective than honeybees. "Bumble bees and other species of wild bees are the most effective pollinators of blueberry." (<a href="http://pollinator.ca" target="_blank">pollinator.ca</a>, <a href="http://www.pollinator.ca/bestpractices/blueberries.html" target="_blank">http://www.pollinator.ca/bestpractices/blueberries.html</a>, and references therein). Lowbush blueberries were predominantly pollinated by bumblebees and other native bees until introductions of pesticide spraying for spruce budworm in Eastern Canada reduced their numbers greatly. The attendant crop losses showed they were important to the crop (Kevan 1975 et seq). In very large commercial lowbush blueberry fields which have little alternative forage, honeybees are indeed imported to maintain yields, but local agricultural agents note that this will not be required if farmers maintain forage strips of wildflowers around blueberry fields.<br><br></div>So yep, honeybees are often used with both crops, but they aren't as good as bumblebees at it. Honeybees are used where excessive pesticide and herbicide used has made native pollinators less abundant.<span class="HOEnZb"><font color="#888888"><br><br></font></span></div><span class="HOEnZb"><font color="#888888">Clement Kent<br></font></span></div>
<br>_______________________________________________<br>
Pollinator mailing list<br>
<a href="mailto:Pollinator@lists.sonic.net">Pollinator@lists.sonic.net</a><br>
<a href="https://lists.sonic.net/mailman/listinfo/pollinator" rel="noreferrer" target="_blank">https://lists.sonic.net/mailman/listinfo/pollinator</a><br>
<br></blockquote></div><br></div>