Acarina (1999) 7, 121-124

A.K. Dobrotvorsky, A.A. Alekseev and A.V. Tkachev (1999)
Toxic effect of pyrethroids on the taiga tick Ixodes pepsulcatus Schulze: Relationships between dose and knockdown time
Acarina 7 (2), 121-124
Abstract: The use of pyrethroids for personal protection against ticks is based on the knockdown effect, e.g. locomotor activity disorders and paralysis developing in a short period of time after contact with the toxicant. So the knockdown time (KT) is one of the critical characteristics of reliability of a pyrethroid as anti-tick clothing treatment agent. The present study is aimed to establish relationships between a dose and the KT for certain marketable pyrethroids (permethrin, alpha-cypermethrin, and flumethrin) which are used (or could be used) for protection against taiga ticks Ixodes persulcatus Schulze.
For all these pyrethroids the KT varied within a wide range at every dose used. We observed similar unimodal distributions of the KT in all experiments. The KT reduced with the increase of the dose, and this relationship was non-linear for all the compounds tested. Flumethrin at high doses caused knockdown developing in the shortest time, although its KT was longest at lower doses. In contrast, KT of permethrin and alpha-cypermethrin were less dependent to dosage.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Ixodes persulcatus