Seasonal activity of adult ticks Ixodes persulcatus P. Sch. in the eastern part of the Russian Plain
Zemskaya, A.A.
Folia Parasitologica 31(3): 260-276
1984
ISSN/ISBN: 0015-5683 PMID: 6541178 Document Number: 224852
In the TBE tick-borne encephalitis focal region in the eastern part of the Russian Plain, the beginning of the adult I. persulcatus activity is usually registered in the last 10 days of April, when the upper soil layers get warmed thoroughly up to -5.degree. or 10.degree. C. The period of activity is dissimilar in different years, varying between 65-95 days. The duration of the activity period is associated with the tick number and seasonal weather. The most favorable years for the activity of adult I. persulcatus are those whose climatic data correspond with mean long-term data. The temperature deviations of each year from the mean long-term values cause the change of the seasonal tick activity. The diurnal rhythm of adult I. persulcatus activity changes during the season.