It only infects larvae that are three to four days old. There are no chemical treatments for this disease. Instead, it can be controlled by bee breeding and good management. The larva in the cell will resemble a chunk of chalk, hence, the name of the disease chalkbrood . Bee stocks selected for hygienic behavior can be expected to minimize outbreaks of this disease.
Hygienic queens are available from nationally-advertised queen breeders.
Another w ay to minimize the disease is to maintain a warm, dry hive interior. Hives that are drafty, damp, lying in low spots, or heavily overgrown with vegetation are susceptible to chalkbrood disease. Hives should lean forward slightly so that rain water runs out the entrance instead of accumulating inside. If a hive is moist, prop the lid to air out the interior. Old equipment should be replaced or repaired if it has large gaping holes that permit entry of moisture and drafts.