Repellency of deet to nymphs of Triatoma infestans.
The repellency of N,N-diethyl-3-methylbenzamide (deet) to Triatoma infestans (Klug) (Hemiptera: Reduviidae) was evaluated using third-instar nymphs and a video tracking technique. Three experimental designs were used: (a) the test arena floor was divided into two halves, only one of which was treated with deet; (b) the arena floor was divided into an inner circle and an outer ring, only the latter treated with deet; (c) half of the test arena was covered by a filter paper roof treated with deet (out of reach of the nymphs). In all three types of experiment, a repellent effect was demonstrated proportional to the dose of deet. When a host (pigeon) was shielded by deet-treated gauze, the rate of blood-feeding by the nymphs was inhibited. Topical pre-treatment of the nymphs with N-ethylmaleimide, to block chemoreception, inhibited the repellency.
Alzogaray
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Centro de Investigaciones de Plagas e Insecticidas (CIPEIN-CITEFA/CONICET), Villa Martelli, Prov. Buenos Aires, Argentina.
Fontan
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Zerba
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D000818:Animals; D014355:Chagas Disease / Q000517:prevention & control; D003671:DEET; D007300:Insect Control; D007302:Insect Repellents; D007303:Insect Vectors; D014224:Triatoma; D014743:Videotape Recording
D007302:Insect Repellents; D003671:DEET