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Journal of the South African Veterinary Association

versão On-line ISSN 2224-9435

Resumo

VENTER, Gert J.; LABUSCHAGNE, Karien; BOIKANYO, Solomon N.B.  e  MOREY, Liesl. Assessment of the repellent effect of citronella and lemon eucalyptus oil against South African Culicoides species. J. S. Afr. Vet. Assoc. [online]. 2014, vol.85, n.1, pp. 01-05. ISSN 2224-9435.

The use of insect repellents to reduce the attack rate of Culicoides species (Diptera: Ceratopogonidae) should form part of an integrated control programme to combat African horse sickness and other diseases transmitted by these blood-feeding midges. In the present study the repellent effects of a commercially available mosquito repellent, a combination of citronella and lemon eucalyptus oils, on Culicoides midges was determined. The number of midges collected with two 220 V Onderstepoort traps fitted with 8 W 23 cm white light tubes and baited with peel-stick patches, each containing 40 mg of active ingredient, was compared with that of two unbaited traps. Two trials were conducted and in each trial the four traps were rotated in two replicates of a 4 x 4 randomised Latin square design. Although more midges were collected in the baited traps, the mean number in the baited and unbaited traps was not significantly different. This mosquito repellent did not influence either the species composition or the physiological groups of Culicoides imicola Kieffer. The higher mean numbers in the baited traps, although not statistically significant, may indicate that this mosquito repellent might even attract Culicoides midges under certain conditions.

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