Accordingly, chalkbrood is most common in spring and in small colonies.
因此，白垩孵化在春季和小群体中最常见。
2
Like their European honey bee relatives, alfalfa leafcutting bees are vulnerable to a disease known as “chalkbrood.”
像它的欧洲蜜蜂同类一样，苜蓿切叶蜂容易受到一种叫做“蜜蜂白垩病”的疾病侵袭。
3
Spraying an iprodione fungicide on the nests after they’re taken out of the nesting boards “reduced chalkbrood levels by up to 50 percent—with no measurable loss of young,” she reports.