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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.
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