European Foulbrood (EFB)

Worker cleaning her proboscis.

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, … Continue reading

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 … Continue reading

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. … Continue reading

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 … Continue reading

Unknown 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, … Continue reading

Spring Sampling in Northern California 2013

Sampling large numbers of beekeepers takes considerable behind-the-scenes planning and work and this aspect of the project usually goes unseen and is underappreciated. I want to shed some light on what we all do to prepare for a hectic and … Continue reading