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Growth inhibitory effect of extracts from Reynoutria sp. plants against Spodoptera littoralis larvae Agrociencia
Pavela,Roman; Vrchotová,Nadezda; Šerá,Bozena.
Laboratory studies were conducted to determine the effects of methanolic extracts from three Reynoutria species on feeding, development and mortality of larvae S. littoralis. The extracts of all three Reynoutria species did not reveal feeding deterrence in the Spodoptera littoralis larvae. However they significantly decreased the larvae growth and the efficiency of conversion of the ingested and digested food. Conversion of the ingested food was lower, when compared with control larvae. The use of food provoked prolongation of the larvae development and chronic toxicity. Even if extracts of all three plant species were effecting the larvae mortality with the same results (LC50 ranged from 0.5 to 1 mg g-1 in all extracts), the impact on growth inhibition in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Reynoutria; Spodoptera littoralis; Growth inhibition; Botanical insecticides; Toxicity test; Plant extracts.
Ano: 2008 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952008000500009
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Toxicite relative de deux insecticides organo-phosphores l'abate et le fenitrothion ArchiMer
Maggi, Pierre.
The effect of the 2 pesticides most frequently used against mosquitoes was tested on a number of marine organisms. Growth inhibition was tested using Phaeodactylum tricornutum and Gyrosigma spencer (algae). To 0.5 ml of culture inoculum containing similar to 100000 cells in exponential growth phase, 9.5 ml of insecticide in varying concentrations were added and the growth was recorded every 48 hour; LG sub(50) was determined. Muscular activity and filtration rate of Crassostrea angulata were tested. The acute toxicity was tested using 4 species of gastropods, 2 lamellibranchs, 5 crustaceans, 1 coelenterate and 3 fishes; the species used were: Gibbula umbilicalis, Purpura lapillus, Littorina littorea, Patella vulgata, Mytilus edulis, Cardium edule, Artemia...
Tipo: Text Palavras-chave: Marine organisms; Toxicity test; Fenitrothion; Abate; Pesticides.
Ano: 1973 URL: http://archimer.ifremer.fr/doc/1973/publication-2229.pdf
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Use of the burrowing amphipod Tiburonella viscana as a tool in marine sediments contamination assessment BABT
Abessa,Denis M.S.; Sousa,Eduinety C.P.M.; Rachid,Bauer R.F.; Mastroti,Ricardo R..
The acute toxicity of sediment samples from Santos Estuary was evaluated by using sediment toxicity tests with the burrowing amphipod Tiburonella viscana. Survival of amphipods acclimated for 2 and 15 days was also analyzed. The sensitivity of this species was evaluated by 48h-exposure tests using potassium dichromate (K2Cr2O7) as a reference substance. The sediment samples from Gonzaga Beach, Prainha and Paranapuã Beach were not toxic to T. viscana, whereas the samples collected at Santos Channel and São Vicente Bay were toxic. The acclimation period did not affect survival significantly, in spite of the higher mortality within the 15-day acclimated group. The estimated 48-h LC50 to K2Cr2O7 was 6.029 mg/L (3.27-11.12). Toxicity tests using T. viscana were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amphipoda; Tiburonella viscana; Toxicity test; Sediment.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000200009
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