| Main Title |
Effect of Diflubenzuron on an Estuarine Crustacean. |
| Author |
Nimmo, D. R. ;
Hamaker, T. L. ;
Moore, J. C. ;
Sommers, C. A. ;
|
| CORP Author |
Environmental Research Lab., Gulf Breeze, FL. |
| Year Published |
1979 |
| Report Number |
EPA-600/J-79-059 ;CONTRIB-379; |
| Stock Number |
PB80-177041 |
| Additional Subjects |
Crustacea ;
Pesticides ;
Toxicology ;
Estuaries ;
Life cycles ;
Insecticides ;
Nitrogen organic compounds ;
Exposure ;
Reproduction(Biology) ;
Concentration(Composition) ;
Bioassay ;
Salinity ;
Reprints ;
Toxic substances ;
Dimilin ;
Benzamide/N-(((chlorophenyl)amino)carbonyl)-difluoro ;
Mysidopsis bahia
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB80-177041 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
6p |
| Abstract |
Data are reported for tests exposing a small, estuarine crustacean, Mysidopsis bahia, to diflubenzuron (Dimilin, TH-6040, (1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea)) in flowing seawater. Tests were conducted in intermittent flows from a diluter or continuous flowing water in which the toxicant was added by an infusion pump. Diflubenzuron was acutely and chronically toxic to M. bahia: the calculated 96-hr LC50 was 2.1 micrograms/l (95% fiducial limits, 1.6 to 2.7 micrograms/l at 24 to 25C and 23 to 29 parts per thousand salinity. In a life-cycle experiment, the 21-day LC50 was 1.24 micrograms/l (95% fiducial limits, 0.84 to 1.8 micrograms/l at 24 to 26C and 23 to 29 parts per thousand salinity). In the life-cycle studies, the reproductive success (number of young produced per female) was found to be a more sensitive criterion of effect than survival of adults. For example, only 13.5 young/female were produced in an estimated concentration of 0.075 micrograms/l whereas 21.4 and 21.0 young/female were produced in controls. As diflubenzuron concentrations increased, there was direct suppression of reproduction. |
| Supplementary Notes |
Pub. in Bull. Environm. Contam. Toxicol., v22 p767-770, 1979. |
| NTIS Title Notes |
Final rept.. |
| Title Annotations |
Reprint: Effect of Diflubenzuron on an Estuarine Crustacean. |
| PUB Date Free Form |
1979 |
| Category Codes |
6T; 6F; 8A; 57Y; 68E; 47D |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/04 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323778284 |
| Origin |
NTIS |
| Type |
CAT |
