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1 February 2007 Sublethal Effects of Mosquito Larvicides on Swimming Performance of Larvivorous Fish Melanotaenia duboulayi (Atheriniformes: Melanotaeniidae)
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Abstract

Laboratory studies were conducted to determine the sublethal effects of exposure to selected larvicides on the critical swimming speed (Ucrit) of crimson-spotted rainbowfish, Melanotaenia duboulayi (Castlenau). This native fish is common throughout southeastern Queensland, and it is increasingly being distributed as a biological control agent of mosquitoes. The selected larvicides included, two organophosphate (OP) compounds (temephos and pirimiphos-methyl), two microbial larvicides (Bacillus thuringiensis spp. israelensis [Bti] de Barjac and Bacillus sphaericus [Bs] Neide), and an insect growth regulator (IGR) (s-methoprene). Exposure to the OP temephos at 10 times the effective field concentration (EFC; 0.33 mg/liter), and OP pirimiphos-methyl at the EFC (0.50 mg/liter), resulted in a significant reduction in the Ucrit of M. duboulayi under controlled conditions. Conversely, exposure to the microbial (Bti and Bs) and IGR (s-methoprene) larvicides at 10 times the EFC had no effect on the Ucrit of M. duboulayi. Accordingly, these products are suitable for integrated pest management programs in Australia.

T. P. Hurst, B. H. Kay, P. A. Ryan, and M. D. Brown "Sublethal Effects of Mosquito Larvicides on Swimming Performance of Larvivorous Fish Melanotaenia duboulayi (Atheriniformes: Melanotaeniidae)," Journal of Economic Entomology 100(1), 61-65, (1 February 2007). https://doi.org/10.1603/0022-0493(2007)100[61:SEOMLO]2.0.CO;2
Received: 24 April 2006; Accepted: 13 September 2006; Published: 1 February 2007
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