Evaluation of the effect of various concentrations of selected pyrethroids on the development of Dermacentor reticulatus eggs and larvae
Journal Title: Annals of Agricultural and Environmental Medicine - Year 2013, Vol 20, Issue 3
Abstract
The Palearctic three-host species[i] Dermacentor reticulatus [/i]contributes to the circulation of numerous pathogens in the environment. Reduction of its abundance may therefore decrease the risk of tick-borne diseases in a given area. The aim of the study is to determine the effect of various concentrations of three pyrethroids – deltamethrin (D), cypermethrin (C), and alpha-cypermethrin (AC) on the development of [i]D. reticulatus [/i]eggs and larvae. 217 engorged [i]D. reticulatus[/i] females were examined in the investigations. After the feeding period, they were sprayed with 0.015625%, 0.03125%, 0.0625%, and 0.125% solutions of D, C, and AC, and kept at a temperature of 25 o C and 90% relative humidity throughout the preoviposition and oviposition periods. Eggs laid by females were kept in the same conditions until larval hatch. Based on the results obtained, parameters of the course of maturation and oviposition, as well as parameters of embryonic development, were determined. The investigations showed that the pyrethroids tested prolonged the egg maturation period, reduced the number and weight of eggs, and caused disturbances in embryogenesis in [i]D. reticulatus[/i]. Upon treatment with as little as 0.015625% AC, larvae did not develop and all eggs died 1–2 days after oviposition. C led to a decreased percentage of normal larval hatch – 31.96%, 15.51% and 12.5%, respectively, after using three increasing concentrations (control 98.15%), and a high rate of egg and embryo mortality. The least detrimental effect on the [i]D. reticulatus[/i] maturation and embryonic periods was exerted by deltamethrin (82.74%, 84.37% and 16.80% of normal larvae in treatment with the three concentrations). Morphological anomalies were observed in larvae during the experimental period. AC appeared to have the most toxic effect during the maturity and egg development periods, while C exhibited lower toxicity. Application of these pyrethroids in engorged [i]D. reticulatus[/i] females exerts distant effects that lead to substantial reduction of tick offspring abundance.
Authors and Affiliations
Alicja Buczek, Katarzyna Bartosik, Paweł Kuczyński
Keywords
Related Articles
- EP ID EP80647
- DOI -
- Views 129
- Downloads 0
Evaluation of the effectiveness of neurofeedback in the reduction of Posttraumatic stress disorder (PTSD) in a patient following high-voltage electric shock with the use of ERPs
Background. The aim of our research was an evaluation of the effectiveness of neurofeedback in reducing the symptoms of Post-trauma stress disorder (PTSD), which had developed as a result of a high-voltage electric burn...
Relationships between personality traits, resting serum hormones and visuomotor ability in male judokas
[b]Introduction.[/b] The purpose of this research was to study the relationships between selected personality features, the speed and accuracy of visumotor ability and hormonal status in the blood of male judokas. [b]M...
Features of the first alcohol test – subsequent attitude of 6 th year students at the State Medical University in Grodno, Belarus
[b]Objective.[/b] To clarify the mechanism of initiation of young people to alcohol, determine what factors influence this process, and identify the particular attitude to alcohol at a young age. [b]Materials and metho...
Acetaminophen (Paracetamol) induced acute liver failure – A social problem in an era of increasing tendency to self-treatment
[b]Introduction.[/b]The widespread availability of medication without prescription, so-called over the counter (OTC), and the rapid development of health consciousness of Poles is associated with broad access to medical...
Selected aspects of a professional doctor-patient communication – education and practice
[b][i][/i][/b]Background: In the work of a physician, not only knowledge, and professional skills (technical/hard) are important, but also psychosocial skills (relational/soft). Objectives: The primary goal of the pres...