Revista do Instituto de Medicina Tropical de São Paulo | |
Lethality of triatomines (Hemiptera: Reduviiae), vectors of Chagas' disease, feeding on blood baits containing synthetic insecticides, under laboratory conditions | |
Marli Maria Lima2  Luis Rey2  Rubens Pinto De Mello1  | |
[1] ,FIOCRUZ Instituto Oswaldo Cruz Departamento de Biologia | |
关键词: Trypanosomiasis; Triatomines; Vector control; Blood feeding; Insecticides; Lethality rate; | |
DOI : 10.1590/S0036-46651991000600002 | |
来源: SciELO | |
【 摘 要 】
A laboratory study was conducted to test the toxicity of synthetic insecticides added to defibrinated sheep blood kept at room temperature and offered as food to the following triatomine species: Triatoma infestans, Panstrongylus megistus, Triatoma vitticeps, Triatoma pseudomaculata, Triatoma brasiliensis and Rhodnius prolixus. The insecticides used, at a concentration of 1g/l, were: HCH, DDT, Malathion and Trichlorfon, and the lethalithy observed at the end of a 7-day period varied according to the active principle of each. HCH was the most effective by the oral route, killing 100% of the insects, except P. megistus (95.7%) and T. pseudomaculata (94.1%). Trichlorfon killed the insects at rates ranging from 71.8% (T. vitticeps) to 98% (R. prolixus). Malathion was slightly less efficient, killing the insects at rates from 56.8% (T. vitticeps) to 97% (T.brasiliensis). DDT was the least effective, with a killing rate of 10% (T. vitticeps) to 75% (T.brasiliensis). Since the tests were performed at room temperature, we suggest that baits of this type should be tried for the control of triatomines in the field.
【 授权许可】
CC BY-NC
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