Exposure to anti-mosquito insecticides utilized in rice fields affects survival of two non-target species, Ischnura elegans and Daphnia magna
| Autor: | Marco Cucco, Aldo Viarengo, Erica Subrero, Susanna Sforzini |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Hatching fungi Daphnia magna Zoology 04 agricultural and veterinary sciences 010501 environmental sciences Biology biology.organism_classification 01 natural sciences Daphnia Acute toxicity Cypermethrin chemistry.chemical_compound Damselfly Diflubenzuron Cladocera chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Paddy and Water Environment. 17:1-11 |
| ISSN: | 1611-2504 1611-2490 |
| Popis: | Insecticides are commonly utilized to control mosquito larvae in rice fields. They can, however, have negative effects on both vertebrates and non-target invertebrate species. In this study, we examined the effects of pulse exposition to different concentrations of cypermethrin (0.15, 0.015, 0.0015 mg/L) and diflubenzuron (0.15, 0.015, 0.0015 mg/L) on egg hatching rate, larval growth, and larval survival in a damselfly, Ischnura elegans, and on survival of a crustacean, Daphnia magna. Insecticide exposure had significant negative effects on hatching rate in damselfly eggs. Exposed damselfly larvae also grew less and showed a higher mortality than control larvae. In Daphnia, the acute toxicity test (ISO 6341 in Water quality—determination of the inhibition of the mobility of Daphnia magna Straus (Cladocera, Crustacea)—acute toxicity test, Int Organ Stand Geneve, Geneva, 2012) showed an increased inhibition of mobility in the presence of insecticides. We observed a proportional response in relation to insecticide concentration, such that the highest exposure levels showed the largest reduction of vital performances. Our highest tested values correspond to those currently employed in agriculture. This study suggests that exposure to two common insecticides strongly affects non-target invertebrates even at very low concentration levels (cypermethrin 0.0015 mg/L and diflubenzuron 0.0015 mg/L). |
| Databáze: | OpenAIRE |
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