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Repellency of deet to nymphs of Triatoma infestans
Author(s) -
Alzogaray R. A.,
Fontan A.,
Zerba E. N.
Publication year - 2000
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1046/j.1365-2915.2000.00213.x
Subject(s) - deet , nymph , triatoma infestans , reduviidae , biology , instar , toxicology , nuisance , zoology , veterinary medicine , hemiptera , ecology , medicine , larva , parasite hosting , trypanosoma cruzi , world wide web , computer science
Summary 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.