7941

• UCREFRP Catalog Number: 7941
• Author: Johnson, W. W. and M. T. Finley
• Title: Editor
• USFW Year: Series
• USFW - Doc Type: 1980
• Copyright Material: NO

18

Test
organism
Stage or
wt (g)
Temp
(C) 96-h LC50
95% CI
(µg/L)
Yellow perch' 0.6 12 5,100
4,520-5,760
Skwala' YCl 7 9.2
7.4-12.0
Brook trout' 1.3 12 4,500
3,948-5,066
Bluegill' 0.7 17 39,000
29,732-51,157
848-h EC50.
bFlow-through test.
SUMMARY OF ACUTE TOXICITY

Test
organism
Wt
(g)
Temp
(C) 96-h LC50
95% CI
(µg/L)
Coho salmon' 0.6 12 530
432-650
Rainbow trout' 1.5 12 380
272-531
Brown trout' 0.5 12 560
475-660
Lake trout' 0.5 12 1648
119-226
Fathead minnow' 1.3 17 872
479-1,590
Channel catfish' 1.0 20 248
94-649
Yellow perch' 0.6 12 147
115-188
Bluegill' 0.8 18 240
186-310
NOTE: Little or no alteration in toxicity resulted when
temperatures were increased from 10° to 21°C for
daphnids or from 7 ° to 17 °C for cutthroat trout and
Atlantic salmon. Conversely, toxicity to brook trout
and yellow perch was significantly increased (4- to 11-
fold) by similar temperature increases. Increases in the
pH of test solutions from 6.5 to 8.5 decreased toxicity
to stoneflies by one-half. However, alkaline test solu- eFlow-through toxicity test.
tions (pH 8.5 to 9.0) were 1.4 to 11.4 times more toxic
to trout, salmon, and yellow perch than were test solu- CARBOPHENOTHION
tions with lower pH (6.5 to 7.5). Variations in hardness
(12 to 300 ppm) did not appreciably alter toxicity to Chemical Name: S-(p-Chlorophenyl) methylthio 0,0-
scuds, trout, or yellow perch. Test solutions aged for 3 diethyl phosphorodithioate
weeks were less toxic to stonefly naiads, yet more
toxic to cutthroat trout. Exposures of channel catfish Alternate Names: Acarithion, CAS 786-19-6, Dagadip,
for 28 days to '*C-labeled carbaryl in the diet (2.8 ENT-23709, Garrathion, Lethox, Nephocarp, R-
mg/kg) or by bath (0.25 mg/L) produced whole body 1303, Trithion
residues of 9 and 11 ng/g, respectively. Within 28 days,
78% of these residues were eliminated by the diet- Principal Use: Insecticide
exposed fish but only 11% by the bath-exposed fish.
Sample Description: Technical material, 95.3%
SUMMARY OF ACUTE TOXICITY
CARBOFURAN
Chemical Name: 2,3-Dihydro-2,2-dimethyl-7-
benzofuranyl methyl carbamate
Alternate Names: Bay 70142, CAS 1563-66-2,
Curaterr, D-1221, ENT-27164, FMC 10242,
Furadan, NIA-10242
Principal Use: Insecticide
Sample Description: Technical material, 99%';
wettable powder, 50%'
96-h LC50
Test Stage or Temp 95% CI
organism wt (g) (C) (µg/L)
G.lacustris M 21 5.2
4.1-6.5
G. fasciatus M 16 10-100
Palaemonetes M 21 1.2
0.8-1.4
Channel catfish 1.1 18 6,000
5,740-6,270