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Prevalence of Borrelia burgdorferi in Ixodes ricinus ticks in Berlin (West).
In 1986, 1711 nymphal and adult Ixodes ricinus orginating from Berlin (West) forests were examined individually or in pools of up to 10 ticks for the presence of Borrelia burgdorferi, the etiologicExpand
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Equilibrium humidities and survival of some tick larvae.
  • W. Knülle
  • Biology, Medicine
  • Journal of medical entomology
  • 10 January 1966
Equilibrium humidities of the larvae of 3 medically important tick species, the Rocky Mountain wood tick, Dermacentor andersoni (Stiles), the American dog tick, Dermacentor variabilis (Say), and theExpand
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Water vapour uptake from subsaturated atmospheres by engorged immature ixodid ticks
Contrary to current opinion, fully engorged and detached larvae and nymphs of some ixodid ticks consistently take up substantial amounts of atmospheric water vapour and thereby display theirExpand
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Cold hardiness, supercooling ability and causes of low-temperature mortality in the soft tick, Argas reflexus, and the hard tick, Ixodes ricinus (Acari: Ixodoidea) from Central Europe.
Seasonal supercooling points (SCPs=temperature of crystallization) and cold hardiness were investigated in the indigenous hard tick, I. ricinus, and in A. reflexus, a soft tick introduced to CentralExpand
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The supercooling ability of ticks (Acari, Ixodoidea)
The supercooling capacity of nine laboratory-held species of ticks originating from different geographical areas, as well as five field-collected species from Germany, was investigated. All but oneExpand
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Significance of fluctuating humidities and frequency of blood meals on the survival of the spiny rat mite, Echinolaelaps echidninus (Berlese).
  • W. Knülle
  • Biology, Medicine
  • Journal of medical entomology
  • 10 August 1967
Water loss and water gain of females of the spiny rat mite, Echinolaelaps echidninus , are balanced at or above their equilibrium humidity (90% rh). Below this level water loss is drastic. WhenExpand
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Life cycle and seaonal development of postembryonicArgas reflexus (Acari: Argasidae) at two thermally different locations in Central Europe
Seasonal development was investigated in the pigeon tick,Argas reflexus (F.) over a 5-year period. The ticks were kept in desiccators at two deposition sites with different temperature conditions: aExpand
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A device for controlling temperature and relative humidity in small chambers.
An experimental set-up that permits an accurate control of relative humidity and temperature of slow-moving air is described. The apparatus consists of 2 air-conditioning units delivering wet and dryExpand
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Seasonal oviposition and temperature requirements of eggs may limit northern distribution of European Argas reflexus (Acari: Argasidae).
Seasonal reproduction and embryonic development was investigated in Argas reflexus (F.) throughout a 5-yr period. Ticks were kept in desiccators at approximately 76% RH at 2 experimental sites--anExpand
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The influence of physiological age of Argas reflexus larvae (Acari: Argasidae) and of temperature and photoperiod on induction and duration of diapause
Abstract The occurrence of diapause and quiescence was investigated in Argas reflexus engorged larvae, nymphs I and nymphs II. For diapause experiments, larvae were maintained at five differentExpand
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