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Everything connected to growing blueberries

Archive for October, 2016

Honeybees favor blackberry blossoms

Posted by blueberrytalk on October 25, 2016

Honeybees forage in the blueberries until the blackberry blossoms open. In the picture below the honey on the left is blueberry blossom honey. It crystalizes very quickly into crystals that are so fine that it is like creamed honey. We like to take it off as soon as it is produced so that it doesn’t blend with the next honey which is blackberry honey.

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The first blackberry blossoms appear well before the blueberry blossoms are over. The picture below was taken May 22. Draper blueberries are in bloom at this time and the Drapers begin to experience the migration of honeybee attention from blueberry blossoms to blackberry blossoms. We see few honeybees working in a late variety like Elliott.

The first blackberry variety sets out blossoms in a compressed period of time. You can see in the picture below that the second blossoms follow right on the heels of the first. It’s all over in a couple of weeks. The bees go right to it when it appears.

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This leads right into the well known Himalayan blackberry which blossoms gradually over the next couple of months. You can see the lineup of buds in the picture below.

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What can a grower do to help the pollination of late varieties? As the season progresses the wild bumblebee population explodes. We rely on worker bumblebees to pollinate the Elliott blossoms. Bumblebee populations can be increased by taking care of the environment they live in. But that’s another story!

Growers can also rely on Mason bees whose lifespan extends past the late blueberry varieties.

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Enhancing Blueberry pollination with Mason bees

Posted by blueberrytalk on October 21, 2016

For the last two years I had set out enough nests to accommodate a 2 ½ times increase in cocoons collected. It quickly became obvious that nests would be full well before the pollination was over. The measure of pollination success is not the cocoons placed in the field but the number of cocoons collected. Each cocoon collected represents something that began with a wad of pollen that was the start of a new cocoon. Each wad of pollen represents 1500 flower visits. Blueberry pollen is very distinctive as can be seen in the picture and the pollen can be easily seen when the bees enter their nest.

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I experienced a more than 2 1/2 times increase in cocoons from the number set out originally. What explains this increase? When cocoons are released in the field some will stay to use the nests that are available where they are released but some will fly away to seek opportunities elsewhere. This would be analogous to swarming in honeybees. On my farm there are so many nest locations (marked by arrows) that many bees will just relocate to another nest location on my farm.

the-farm

NOTE: IMPORTANT CHANGE TO THE NUMBERS  NOVEMBER 19, 2016

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Dealing with wasps

Posted by blueberrytalk on October 19, 2016

Wasps can be distracted  from trying to enter honeybee colonies. A container of cappings is placed on the inner cover to give the honeybees a couple of days to lick off whatever honey the can find. Then the container with others is placed on the top of a colony. Wasps will be drawn to this for the last remains of honey rather than run the risk of trying to enter a hive. If you want to reduce the wasp population the picture shows how.

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Preparing cocoons for winter storage

Posted by blueberrytalk on October 18, 2016

 

Separate good cocoons from infestations of pollen mites and store 500 at a time in plastic trays. The double layer of plastic is to protect from rodents. Storage for the present is in a closed carport that is a couple of degrees warmer that outside temperatures.

We are getting 5.7 cocoons average from a 6 inch nest.

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