Journal of Economic Entomology (2007) 100, 61-65

T. P. Hurst, B.H. Kay, P.A. Ryan and M.D. Brown (2007)
Sublethal effects of mosquito larvicides on swimming performance of larvivorous fish Melanotaenia duboulayi (Atheriniformes: Melanotaeniidae)
Journal of Economic Entomology 100 (1), 61-65
Abstract: Laboratory studies were conducted to determine the sublethal effects of exposure to selected larvicides on the critical swimming speed (U _crit) 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 U _crit 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 U _crit of M. duboulayi. Accordingly, these products are suitable for integrated pest management programs in Australia.
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Database assignments for author(s): Timothy P. Hurst, Peter A. Ryan, Brian H. Kay

Research topic(s) for pests/diseases/weeds:
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Melanotaenia duboulayi (predator)			Australia (NT+QLD)