[Sublethal action and aftereffect of DDT on Dermacentor silvarum 01. (Acarina, Ixodidae)]

Observations were conducted on the processes of feeding and oviposition in the females of Dermacentor silvarum poisoned with DDT, the ancestors of which had been subjected to this acaricide and had overcome the poisoning due to the feeding. The rise in the sensitivity to DDT in the females of the second generation and a number of pathological changes both in feeding females and in their progeny were noted.