Comparative toxicity of pyrethroid insecticides to two estuarine crustacean species, Americamysis bahia and Palaemonetes pugio

Abstract

Pyrethroid insecticides are widely used on agricultural crops, as well as for nurseries, golf courses, urban structural and landscaping sites, residential home and garden pest control, and mosquito abatement. Evaluation of sensitive marine and estuarine species is essential for the development of toxicity testing and risk-assessment protocols. Two estuarine crustacean species, Americamysis bahia (mysids) and Palaemonetes pugio (grass shrimp), were tested with the commonly used pyrethroid compounds, lambda-cyhalothrin, permethrin, cypermethrin, deltamethrin, and phenothrin. Sensitivities of adult and larval grass shrimp and 7-day-old mysids were compared using standard 96-h LC50 bioassay protocols. Adult and larval grass shrimp were more sensitive than the mysids to all the pyrethroids tested. Larval grass shrimp were approximately 18-fold more sensitive to lambda-cyhalothrin than the mysids. Larval grass shrimp were similar in sensitivity to adult grass shrimp for cypermethrin, deltamethrin, and phenothrin, but larvae were approximately twice as sensitive to lambda-cyhalothrin and permethrin as adult shrimp. Acute toxicity to estuarine crustaceans occurred at low nanogram per liter concentrations of some pyrethroids, illustrating the need for careful regulation of the use of pyrethroid compounds in the coastal zone.

Exploring alternative insecticide delivery options in a “lethal house lure” for malaria vector control

“…PermaNet 3.0 is impregnated with type II pyrethroid deltamethrin, whereas Olyset Plus is treated with type I pyrethroid permethrin. There is evidence that type II pyrethroids, which contains an alpha cyano group, are more toxic than type I pyrethroids 51 . This is supported by the results of the WHO susceptibility assays with deltamethrin killing significantly higher proportion (95%) of pyrethroid resistant mosquitoes pre-exposed to PBO compared to permethrin (38%).…”

Golf course living leads to a diet shift for American alligators

“…Crustaceans are a highly diverse and abundant group of animals on Georgia's barrier islands (Dorjes, 1977 ; Prezant et al, 2002 ), especially in the salt marshes and brackish wetlands normally frequented by alligators, but golf courses have the potential to impact local crustacean communities. The topography and hydrology of the landscape are both affected by golf course construction (Winter & Dillon, 2005 ), which may alter habitats on which crustaceans rely, and pesticides used on golf courses can be acutely toxic to crustaceans (DeLorenzo et al, 2014 ; Rainwater, 2002 ). Conversely, multiple studies have reported that golf courses can support higher insect species richness and abundance than nearby habitats (Tanner & Gange, 2005 , Mata et al, 2017 , Saarikivi et al, 2015 ).…”

Exploring alternative insecticide delivery options in a “Lethal House Lure” for malaria vector control

“…PermaNet 3.0 is impregnated with type II pyrethroid deltamethrin, whereas Olyset Plus is treated with type I pyrethroid permethrin. There is evidence that type II pyrethroids, which contains an alpha cyano group, are more toxic than type I pyrethroids 53 . This is supported by the results of the WHO susceptibility assays with deltamethrin killing signi cantly higher proportion (95%) of pyrethroid resistant mosquitoes pre-exposed to PBO compared to permethrin (38%).…”