. Sanitary entomology; the entomology of disease, hygiene and sanitation. Plate XXVII.—The cattle tick, Boophilus annukdus. Fig. 1 (I>eft)—Fully engorgedfemale. Fig. 2 (Right)—Engorged female depositing eggs. (Bishopp.) passed on the host. The females deposit from 2,500 to 4,500 eggs. Insummer these hatch in from 20 to 30 days, while in the fall and winterthe incubation period ma}^ extend to 200 days. The longevity of the seedtick varies according to temperature and humidity from about two toeight months, and the period from dropping of the engorged female tothe death of all of her progeny,
. Sanitary entomology; the entomology of disease, hygiene and sanitation. Plate XXVII.—The cattle tick, Boophilus annukdus. Fig. 1 (I>eft)—Fully engorgedfemale. Fig. 2 (Right)—Engorged female depositing eggs. (Bishopp.) passed on the host. The females deposit from 2,500 to 4,500 eggs. Insummer these hatch in from 20 to 30 days, while in the fall and winterthe incubation period ma}^ extend to 200 days. The longevity of the seedtick varies according to temperature and humidity from about two toeight months, and the period from dropping of the engorged female tothe death of all of her progeny, or the nonparasitic period, raiiges from28 days in summer to 279 days in cooler weather. The period of attach-ment of the seed tick to the host until the engorged female detachesranges from 20 to 59 days. Both of these periods are of considerableimportance in connection with control by the so-called pasture rotationmethods. The Geinis Rhipicephalus.—This group, though small, contains many 436 SANITARY ENTOMOLOGY species of importance. The species are most abun
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbenefic, bookyear1921
