Posts Tagged: honey bee

Know your honey bee colonies: non-destructive testing for varroa mites

http://beeinformed.org/2015/03/know-your-honey-bee-colonies-non-destructive-testing-for-varroa-mites/

Varroa mites (Varroa destructor) were accidentally introduced into the U.S. in 1987 and rapidly became a destructive pest of honeybees. Not only do varroa mites suck the blood (haemolymph) of the bees, they transmit disease through this feeding and generally weaken colonies (Rosenkranz et al. 2010).  Low infestations of varroa mites left without mitigation can…

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European Foulbrood (EFB)

http://beeinformed.org/2013/12/european-foulbrood-efb/

EFB is often found when nectar flows are sporadic or there is an insufficient number of nurse bees to attend brood. How does EFB spread? European Foulbrood (Melissococcus plutonius) is transmitted when the bacteria become mixed with the bee bread, nectar or diluted honey, and then fed to young larvae. The bacteria then replicate in…

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Chalkbrood

http://beeinformed.org/2013/11/chalkbrood/

Chalkbrood (Ascosphaera apis) is typically observed during the spring but symptoms can be seen throughout the year. Chalkbrood contaminates larvae when the spores are mixed with brood food. The fungus will outcompete larvae for food and eventually turn the larvae into a “chalk-like” mummy. The color of chalkbrood ranges from white to grey then starts…

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Sacbrood Virus (SBV)

http://beeinformed.org/2013/10/sacbrood-virus-sbv/

SBV or Sacbrood Virus (Morator aetatulas) often appears during spring or colony buildup and causes larval death. The pupa fails to pupate and has a “shrunken head” appearance. When you see perforations in the sealed brood with the infected larvae inside, the perforation is usually choppy or jagged indicating a problem. If the SBV pupa…

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Parasitic Mite Syndrome (PMS)

http://beeinformed.org/2013/10/parasitic-mite-syndrome-pms/

PMS or Parasitic Mite Syndrome is a condition that causes a honey bee colony to deteriorate and eventually dwindle away and die. There has not yet been a pathogen detected which causes the brood symptoms that appear with this syndrome. However there are always varroa mites present with this syndrome. The brood symptoms look similar…

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Neglected Drone Brood

http://beeinformed.org/2013/07/neglected-drone-brood/

Throughout the year several honey bee diseases can be noted in stressed or sick colonies. There are also other stress factors that cause colony conditions to deteriorate and look very similar to sick or diseased colonies. One condition is neglected drone brood. It is caused by either a drone laying queen, laying workers, poorly mated…

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Know Your Local Pollinators!

http://beeinformed.org/2013/04/know-your-local-pollinators/

Today I am posting on behalf of one of our undergrads, Tyler Connine. He is a pre-med biochemistry major at University of Maryland with a unique awareness of the natural world. Tyler is part of our ongoing Nosema project which is focused on the examination of individual bees for Nosema spores. Aside from his growing interest…

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Unknown Brood Damage

http://beeinformed.org/2013/04/insecticide-brood-damage/

Posted 4/17/2013 This blog was changed from the original post. The title has changed from Pesticide brood Kill to Unknown Brood Damage. This change was in response to the comments I have received both on this blog and by emails, I want to clarify a few of my comments. First, I regret the original title…

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