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<br />96-h LC50 96-h LC50
<br />Test Stage or Temp 95% Cl Test Stage or Temp 95% CI
<br />organism wt (g) (C) (mg/L) organism wt (g) (C) (µg/L)
<br />
<br />Carp' 1.1 12 12.0 Cutthroat trout' 1.2 10 1,580
<br />10.2-14.2 1,290-1,930
<br />Bluegill' 0.5 12 4.3 Lake trout' 2.0 10 1,900
<br />3.2-5.0 1,700-2,020
<br />848-h EC50. Cypridopsis' M 21 18a
<br />bTested in hard water, 272 ppm CaCO..
<br /> Palaemonetes' M 21 10°
<br />NOTE: Variations in temperature (7° to 17°C), pH (6.5 7.1-14.0
<br />to 9.0), or water hardness (12 to 300 ppm) did not effec-
<br />tively alter the toxicity to fish. Toxicity to brown trout Coho salmon' 0.4 13 1,320
<br />did not change after periods of up to 3 weeks of 1,020-1,680
<br />aqueous degradation.
<br /> Rainbow trout' 1.0 13 930
<br /> 750-1,150
<br /> Brown trouts 1.1 13 1,330
<br />FENTHION 966-1,820
<br /> Carp' 0.5 18 1,160
<br />Chemical Name: 0,0-Dimethyl 0-[4-(methylthio)-m- 532-2,550
<br />tolyl] phosphorothioate
<br /> Fathead minnow' 0.9 18 2,440
<br />Alternate Names: Bay 29493, Baytex, CAS 55-38-9, 1,830-3,270
<br />DMPT, ENT-25540, Entex, Lebaycid, Quelatox, S-
<br />1752, Tiguron Black bullhead' 1.2 18 1,350
<br /> 1,020-1,800
<br />Principal Use: Insecticide
<br />Channel catfish'
<br />1.1
<br />18
<br />1,600
<br /> 1,250-29060
<br />Sample Description: Technical material, 97%1; Baytex
<br />spray concentrate, 46%'; Baytex spray concentrate, Green sunfish' 1.1 18 2,340
<br />47.5%3 1,750-3,130
<br />SUMMARY OF ACUTE TOXICITY
<br /> 96-h LC50
<br />Test Stage or Temp 95% CI
<br />organism wt (g) (C) (µg/L)
<br />Simocephalus' I1 21 0.628
<br /> 0.44-0.87
<br />Daphnia pulex' I1 15 0.808
<br /> 0.56-1.20
<br />Asellus' M 21 1,800
<br /> 1,100-4,900
<br />G.lacustris' M 21 8.4
<br /> 5.0-12.0
<br />Orconectes' IE 21 50b,-
<br /> 35-90
<br />Pteronarcys' YC2 15 4.5
<br /> 3.3-6.7
<br />Yellow perch' 1.4 18 1,650
<br /> 1,350-2,020
<br />Goldfish' 0.9 18 3,404
<br /> 1,775-6,536
<br />Bluegill' 1.5 18 1,380
<br /> 1,080-1,770
<br />Largemouth bass' 0.9 18 1,540
<br /> 1,430-1,660
<br />848-h EC50.
<br />bFive-day LC50.
<br />Hard water, 272 ppm CaCO,.
<br />NOTE: Toxicity to fish did not change within a pH
<br />range of 6.0 to 9.0 or a water hardness range of 44 to
<br />272 ppm. The time-independent LC50 for cutthroat
<br />trout was 460 µg/L. The cumulative toxicity index of
<br />2.5 indicated a low level of cumulative toxicity.
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