Diseases of bees / Ministry of Agriculture and Fisheries.

Date:
1948
Catalogue details

Licence: Public Domain Mark

Credit: Diseases of bees / Ministry of Agriculture and Fisheries. Source: Wellcome Collection.

    18/36 (page 14)
    Fic. 3. AMERICAN FouL Broop. Note many sealed cells with dark, sunken or perforated cappings. Fic. 4. AMERICAN FouLt Broop. Many of the open cells have had _ their cappings removed by bees and contain scales (not visible in the photograph),