Deltamethrin Persistence on Textiles Used to Make Visual Targets for Tsetse Fly Control is Positively Correlated With Their Polyester Content
| Autor: | Armelle Vallat, Emmanuel Kamba Mebourou, Patrick M. Guerin, Francis Oloo, Martine Bourquin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Insecticides Textile Tsetse Flies Polyesters 030231 tropical medicine Glossina pallidipes Insect Control 01 natural sciences Persistence (computer science) Lethal Dose 50 Toxicology 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Nitriles Pyrethrins medicine Animals African trypanosomiasis Viscose General Veterinary biology business.industry Textiles Tsetse fly medicine.disease biology.organism_classification Polyester 010602 entomology Infectious Diseases Deltamethrin chemistry Insect Science Female Parasitology business |
| Zdroj: | Journal of Medical Entomology. 57:1525-1531 |
| ISSN: | 1938-2928 0022-2585 |
| DOI: | 10.1093/jme/tjaa057 |
| Popis: | Insecticide-impregnated traps and visual targets are used for tsetse (Diptera, Glossinidae) population control. Such devices are made with textiles and deltamethrin is frequently the insecticide of choice. However, persistence of an insecticide on textiles is affected by exposure to weather. Here we examine the effect of weathering on the capacity of four textiles with increasing proportions of polyester (0, 35, 65, and 100%) with cotton and viscose to retain deltamethrin. Textiles tested were those used to make visual targets in a pan-African program to maximize target efficiency for controlling tsetse vectors of African trypanosomiasis. Following impregnation in an aqueous suspension of deltamethrin at 1,000 mg/m2, textiles were weathered for 18 mo at Lambwe Valley, Kenya and sampled every 3 mo to make knockdown tests on the tsetse fly Glossina pallidipes Austen. Deltamethrin content of the textiles was established using gas chromatography mass-spectrometry at impregnation and after 9 mo of weathering. Textiles with higher proportions of polyester retained deltamethrin better: respectively, 100% polyester and 65:35 polyester/viscose textiles retained deltamethrin at 17 and 11 mg/m2 9-mo post-treatment that caused 100% knockdown in G. pallidipes after 1 h, and killed 67 and 47% of flies, respectively, after 24 h. Eighteen-month weathered 100% polyester treated textile still knocked down all tsetse exposed to it within 2 h. The LD50 for deltamethrin on filter paper for G. pallidipes was estimated at 28.8 mg/m2, indicating that deltamethrin is more available on polyester to kill tsetse. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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