Synopses & Reviews
Synopsis
Excerpt from The Review of Applied Entomology, Vol. 4: Series B: Medical and Veterinary
The non-parasitic stages vary with season and temperature. The pre-oviposition period varies from 2 to 56 days, the Oviposition period from 9 to 122 days. Engorged adults are negatively phototropic. The rate Of Oviposition varies with the temperature. Engorged adults exposed to temperatures Of 24 F. Or lower may be killed by freezing. Under dry conditions, they will survive at lower temperatures. Experiment showed that all eggs exposed to a temperature Of 2 F. Were killed. Within the humid portion Of the tick area, humidity is probably not an important factor in larval longevity when the eggs hatch during the same season as they are laid. The average longevity Of larvae hatching from overwintering eggs is 94 days, that Of larvae from eggs hatching before winter is 176 days. Larvae are able to survive the ordinary winter temperatures of the tick area, except along the northern border. A temperature of 4 F. Is fatal to all larvae.
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