Main Title |
Short-Term Amphibian Toxicity Tests and Paraquat Toxicity Assessment. |
Author |
Linder, G. ;
Barbitta, J. ;
Kwaiser, T. ;
|
CORP Author |
Corvallis Environmental Research Lab., OR. ;NSI Technology Services Corp., Corvallis, OR. ;Detroit Univ., MI. |
Publisher |
1989 |
Year Published |
1989 |
Report Number |
EPA/600/D-89/223; |
Stock Number |
PB90-134305 |
Additional Subjects |
Toxicity ;
Anura ;
Amphibia ;
Exposure ;
Tables(Data) ;
Paraquat ;
Teratogen
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-134305 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
30p |
Abstract |
Changes in agricultural practice may alter agrichemical effects on nontarget wildlife. Because of routine practice in various forms of conservation tillage, paraquat (1,1'-dimethyl-4,4'-bipyridinium dichloride) has increasingly been used for weed control in agricultural fields and in supporting management practices. Though highly adsorbed by soil and foliage, paraquat may gain increased notice as an agrichemical potentially impacting wetlands which surround much of the farmland across the country; consequently, amphibian toxicity evaluations may be incorporated into wildlife hazard assessments conducted for chemicals finding increased use in conservation tillage. Using amphibians representative of two anuran families, early life stage toxicity tests (96 hr modified FETAX) were performed. Acute and subacute exposures were completed, and toxicity endpoints (mortality and teratogenicity) were evaluated for exposure to technical-grade and formulation-grade paraquat. These preliminary toxicity assessments suggested that acute and subacute endpoints for each form of paraquat may be significantly different, since the commercial formulation was three times as acutely toxic as the technical-grade chemical. Furthermore, it appeared that species and familial differences must be regarded with increased caution until a comparative toxicity data base is developed for amphibians. |
Supplementary Notes |
Pub. in Proceedings of ASTM (American Society for Testing and Materials) Aquatic Toxicology and Risk Assessment Symposium (13th), Atlanta, GA., April 1989. Prepared in cooperation with NSI Technology Services Corp., Corvallis, OR., and Detroit Univ., MI. |
NTIS Title Notes |
Symposium paper. |
Category Codes |
57Y; 68G |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/02 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
005317141 |
Origin |
NTIS |
Type |
CAT |