. A manual of veterinary hygiene. Veterinary hygiene. FOOD 169 skin of the horse, that they have been believed by some to be capable of producing mange. This, however, is not correct. The Acari reduce the food to powder, and what they do not eat is soiled by their debris. They can easily be seen by placing some of the material on black paper. Fortunately they are them- selves exposed to the attacks of an enemy Psocus pulsatorius and veloce, both of which actively pursue and destroy them, and at the same time do no damage to the food. The weevil, Calandra gramma, is a very common pest of grain;
. A manual of veterinary hygiene. Veterinary hygiene. FOOD 169 skin of the horse, that they have been believed by some to be capable of producing mange. This, however, is not correct. The Acari reduce the food to powder, and what they do not eat is soiled by their debris. They can easily be seen by placing some of the material on black paper. Fortunately they are them- selves exposed to the attacks of an enemy Psocus pulsatorius and veloce, both of which actively pursue and destroy them, and at the same time do no damage to the food. The weevil, Calandra gramma, is a very common pest of grain; it is most destructive, reducing it to an empty shell. Weevils are generally found in grain which has been kept for some little time. The effect on animals partaking of food affected with vege-. Fig. 36.—Gamasus fenorum, magnified (Magne aud Baillet).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Frederick 1857-1929. New York : W. R. Jenkins
Size: 1581px × 1581px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkwrjenkins
