Title : Risk assessment of etofenprox (Vectron) on non-target aquatic fauna compared with other pesticides used as Simulium larvicide in a tropical environment - Yameogo_2001_Chemosphere_42_965 |
Author(s) : Yameogo L , Traore K , Back C , Hougard JM , Calamari D |
Ref : Chemosphere , 42 :965 , 2001 |
Abstract :
Within the rotational scheme developed by the Programme to fight the resistance of Simulium damnosum to chemical larvicides, there was an operational gap at discharges between 5 and 70 m3 s(-1) for the treatment of rivers where resistance to organophosphates was present. The use of permethrin and carbosulfan was precluded because of risk of environmental impact and, Bacillus thuringiensis ser. H-14 treatments were not envisageable due to cost and logistics constraints. Among the possible complementary groups of larvicides tested, the pseudo-pyrethroids, held promise, because of a mode of action similar to that of pyrethroids, but along with a usually lower toxicity for fish. Etofenprox, one of the pseudo-pyrethroids tested, shows a global detachment of non-target insects in 24 h close to that of pyraclofos, an organo-phosphorus compound (27 against 23%). In laboratory conditions, six times the operational dose which is 0.03 mg l(-1) 10 min, is needed to cause 50% mortality of Caridina sp. (a small shrimps species) and 30 times this same dose for 95% mortality. For fish species, a safety margin of 400-800 times the operational dose is observed for Oreochromis niloticus and 200-400 times for Tilapia zillii. |
PubMedSearch : Yameogo_2001_Chemosphere_42_965 |
PubMedID: 11272920 |
Inhibitor | Pyraclofos |
Yameogo L, Traore K, Back C, Hougard JM, Calamari D (2001)
Risk assessment of etofenprox (Vectron) on non-target aquatic fauna compared with other pesticides used as Simulium larvicide in a tropical environment
Chemosphere
42 :965
Yameogo L, Traore K, Back C, Hougard JM, Calamari D (2001)
Chemosphere
42 :965