CFW are active for about 5 weeks and they cannot be controlled with only one post-pollination spray. Make arrangements for pollination. While blueberries are self-fruitful, but cross pollination increases the size of the fruit. Pollinators are needed for this cross pollination. Different varieties vary in their attractiveness to bees and therefore require either more or fewer hives per acre to successfully pollinate them.
Bumblebees are better pollinators for blueber-ries but are more expensive to get.
Call me for more information on numbers of bee hives needed for good pollination. Early Season Disease Managemnt - Peter V. Oudemans, Rutgers University Blueberries are well into bloom at this time. Mummy berry, anthracnose and blossom blight are the major fungal diseases that currently need to be managed. For mummy berry, shoot strikes should be visible and in areas where these primary in-fections are severe the flowers will require protection from secondary infection. For maximum control, fungicide applications should made prior to mid-bloom and should not be applied post bloom.