Abstract

The results of the reported studies show that incomplete feeding is more harmful to larvae than to nymphs of Dermacentor variabilis (Say) (Acarina: Ixodidae); more partially fed larvae than nymphs die and fewer insufficiently fed larvae than nymphs accept a 2nd blood meal. Deprivation results in miniature nymphs and adults, the latter having little or no scutal ornamentation. Data on minimum feeding time and nutritional requirements for satiation and molting are reported. The presumed ecological significance of the experimental results is discussed.

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