Individual study: Use of natural pyrethrum to control the red swamp crayfish Procambarus clarkii in a rural district of Italy
Cecchinelli E, Aquiloni L, Maltagliati G, Orioli G, Tricarico E & Gherardi F (2012) Use of natural pyrethrum to control the red swamp crayfish Procambarus clarkii in a rural district of Italy. Pest Management Science, 68, 839-844
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Procambarus crayfish control: Add chemicals to the water
One replicated, controlled study in 2009 in Italy (Cecchinelli et al. 2012) found that natural pyrethrum (Pyblast) concentrations of 0.05mg/l and higher resulted in 100% mortality of red swamp crayfish Procambarus clarkii under laboratory conditions, 95% mortality when 0.05mg/l Pyblast was applied to a drainage channel, but no mortality following application of 0.05 mg/l Pyblast into active crayfish burrows. For the drainage channel study, two 50m-long upstream control transects were compared with two downstream transects treated with 0.05 mg/l Pyblast, and mortality of crayfish in each transect was monitored recorded every 24 h for 96 h. For the burrow study, a 0.3 l solution of 0.05 mg/l Pyblast was injected up to 2 m inside active crayfish burrows after the channel had been drained. Crayfish population changes were assessed by comparing capture rates in four replicated, baited traps before and after the treatment.