Wild Bumblebee (Bombus) Diversity and Nosema (Microsporidia: Nosematidae) Infection Levels Associated with Lowbush Blueberry (Vaccinium angustifolium) Production and Commercial Bumblebee Pollinators

Table 3

Nosema infection in bumblebee species collected in Maine blueberry fields over two years (2009-2010) based on microscopic and molecular examination.

Species	Number positive*/; number caught	% Infection*	Fraction of positive* bees without amplification; (see text)
B. terricola	6/13	46.2	0.33
B. perplexus	3/18	16.67	0
B. impatiens	7/102	6.86	0.72
Psithyrus	1/15	6.67	0
B. vagans	10/175	5.71	0.5
B. ternarius	14/374	3.74	0.57
B. bimaculatus	1/68	1.47	1

*Based on visual assessment under 400x magnification with phase contrast microscopy.