Folia Parasitologica 49[4] 314-318 (2002) | DOI: 10.14411/fp.2002.058

Nymphal diapause and its photoperiodic control in the tick Ixodes scapularis (Acari: Ixodidae)

Valentin N. Belozerov1, Rudolf L. Naumov2
1 Biological Research Institute, St. Petersburg State University, Oranienbaumskoe Shosse 2, Stary Peterhof, St. Petersburg, 198504, Russia
2 E.I. Martsinovsky Institute of Medical Parasitology and Tropical Medicine, Malaya Pirogovskaya Street 20, Moscow, 119435, Russia

It is shown experimentally that the option between developmental diapause and non-diapause development in nymphs of Ixodes scapularis Say, 1821 (Middle Atlantic population) is determined by photoperiodic conditions according to a two-step photoperiodic reaction of short-day long-day type. Diapause arrest of development is induced by an impact of either long day upon unfed nymphs, or short day upon engorged nymphs, while non-diapause development completed in 2-2.5 months at 20°C needs the change from short-day to long-day conditions. Some ecophysiological aspects of mechanisms controlling seasonal development of ticks belonging to Ixodes ricinus complex are discussed.

Keywords: developmental diapause, photoperiodic response, nymphal stage, ixodid ticks, Ixodes scapularis

Received: December 27, 2001; Accepted: July 22, 2002; Published: December 1, 2002  Show citation

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Belozerov, V.N., & Naumov, R.L. (2002). Nymphal diapause and its photoperiodic control in the tick Ixodes scapularis (Acari: Ixodidae). Folia Parasitologica, 49(4), 314-318. doi: 10.14411/fp.2002.058
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