. Diseases of poultry; their etiology, diagnosis, treatment, and prevention. Poultry. External Parasites 229 pest. The following notes are taken from a paper by Laurie.^ These parasites belong to the group of mites Acari. In the adult stage they have four pairs of legs but in the larval stages only three pairs (Figs. 49 and 50). These ticks are nocturnal in habit. During the day they secrete themselves in cracks and crevices and are rarely seen. At night they come out on to the roosts and fasten. Fig. 50. — The poultry tick. Larva, showing the three pairs of legs. (After Laurie.) themselves up
. Diseases of poultry; their etiology, diagnosis, treatment, and prevention. Poultry. External Parasites 229 pest. The following notes are taken from a paper by Laurie.^ These parasites belong to the group of mites Acari. In the adult stage they have four pairs of legs but in the larval stages only three pairs (Figs. 49 and 50). These ticks are nocturnal in habit. During the day they secrete themselves in cracks and crevices and are rarely seen. At night they come out on to the roosts and fasten. Fig. 50. — The poultry tick. Larva, showing the three pairs of legs. (After Laurie.) themselves upon the birds. After gorging themselves with blood they return to the cracks to digest their meal. An adult tick feeds only about once a month, as it requires that time to digest fully one meal. During the growing periods they undergo a molt after digesting each meal. These ticks breed very prolifically, so that a poultry house once infested soon becomes overrun by them. 1 Laurie, D. F. The Poultry Tick. Dept. of Agric. of South Australia, Bui. No. 74, pp. 1-32, 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 Pearl, Raymond, 1879-1940; Surface, Frank M. (Frank Macy), 1882- joint author; Curtis, Maynie R. (Maynie Rose), b. 1880, joint author. New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpoultry, bookyear1915
