Effect of Environmental Conditions and Toxic Compounds on the Locomotor Activity of Pediculus humanus capitis (Phthiraptera: Pediculidae)

Journal of Medical Entomology
I Ortega-InsaurraldeM I Picollo

Abstract

In this work, we evaluated the effect of environmental variables such as temperature, humidity, and light on the locomotor activity of Pediculus humanus capitis. In addition, we used selected conditions of temperature, humidity, and light to study the effects of cypermethrin and N,N-diethyl-3-methylbenzamide (DEET) on the locomotor activity of head lice. Head lice increased their locomotor activity in an arena at 30°C compared with activity at 20°C. When we tested the influence of the humidity level, the locomotor activity of head lice showed no significant differences related to humidity level, both at 30°C and 20°C. Concerning light influence, we observed that the higher the intensity of light, the slower the movement of head lice. We also demonstrated that sublethal doses of toxics may alter locomotor activity in adults of head lice. Sublethal doses of cypermethrin induced hyperactivated responses in adult head lice. Sublethal doses of DEET evocated hypoactivated responses in head lice. The observation of stereotyped behavior in head lice elicited by toxic compounds proved that measuring locomotor activity in an experimental set-up where environmental conditions are controlled would be appropriate to evaluate compounds of bi...Continue Reading

References

Jan 1, 1988·Annual Review of Entomology·K F Haynes
Mar 29, 2001·Archives of Insect Biochemistry and Physiology·R A Alzogaray, E N Zerba
Jul 27, 2002·Australian and New Zealand Journal of Public Health·Rick SpeareChris Cahill
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Aug 3, 2011·Journal of Insect Physiology·Gastón Mougabure-CuetoClaudio R Lazzari
Jan 1, 2014·PloS One·Valeria SfaraRaúl A Alzogaray

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Citations

Dec 25, 2016·Journal of Medical Entomology·Isabel Ortega-InsaurraldeMaría Inés Picollo
Oct 28, 2019·Journal of Medical Entomology·F G GalassiP Gonzalez-Audino

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