Greg Hunt of Purdue U. talks pesticides and mite-biting honeybees. See varroa under microscope





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Published on Feb 26, 2013

Dr. Greg Hunt of Purdue University, Dept. of Entomology visits Southeastern Indiana Beekeepers Association to lead a discussion on the affects of pesticides on bees. He is also studying mite-biting bees. These bees have some of the VSH (Varroa Sensitive Hygiene) trait, but also have bitten the legs off many of the mites. See these mites under a microscope for yourself. I have set up markers below to allow you to jump to various areas of the video.

Find out more about Dr. Hunt and his work at: http://extension.entm.purdue.edu/beehive
Visit Southeastern Indiana Beekeepers at: http://www.indianahoney.org

Highlights of the "Clothianidin pesticide and planting dust"
- What's the fastest route from the pesticide to the bee?
- 4ppb Clothianidin in the bees, highly contaminated (toxic to bees)
- Clothianidin is water soluble. When it rains, problem goes away for a while
- 99% of the corn is treated. 70-80% of soybeans are treated
- Growers don't have many choices in buying untreated seed
- Sub-lethal affects still in investigation
- Air-powered planters are a problem in that they blow the talc all over
- Morale of the story... if you are around agricultural, this is a very real problem for you
- Talk to the farmer to get a heads up and you can try to keep your bees inside
- You can put sprinklers out top make the bees think it's raining
- 12:35 during pollen season bees cycle pollen rapidly
- 12:56 Pollen feeding experiment
- 13:36 Neonicotinoids, good for us, bad for the bees

Highlights of "Mites, and bees that bite them!" 16:57
- Two traits in bees that are important to mite resistance (Grooming behavior, and VSH "Varroa Sensitive Hygiene)
- 18:13 The proportion of chewed mites is a reliable measure of grooming behavior
- 19:46 Look at these chewed mites under a microscope!
- Not sure yet how repeatable this is based on current data
- 26:39 Can you do this yourself in your own apiary?
- 26:58 The front legs on a mite are called pedipalps.
- Generally, Italians make a lot of brood... so they have a lot of mites :(
- 30:40 If mites are out of hand, Dr. Hunt's group treats with Api-Gard (syntehtic Thymol) and they re-queen.
- 33:52 Look for the VSH (Varroa Sensitive Hygiene) trait in your bees! (low mite reproduction)
- 37:12 Before mites, typical failure rate of hives was around 10%, now we're losing about 30%
- 37:50 How to use Oxalic acid, a naturally occuring acid in plants, effective for mite control when bees are broodless.
- 43:34 Deformed wing virus and the interaction with bees
- 45:20 Using drone frames to deal with mites
- 47:26 Last look at various mites under a microscope


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