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46 LEPTOPHOS SUMMARY OF ACUTE TOXICITY 96-h LC50 Chemical Name: 0-(4-Bromo-2,5-dichlorophenyl) 0- Test Wt Temp 95% CI methylphenylphosphonothioate organism (g) (C) (mg/L) Alternate Names: Abar, Lepton, MBCP, Phosvel, VCS Rainbow trout' 0.9 12 1.6 5-d, VDS-506 1.2-2.1 Principal Use: Insecticide Fathead minnow' 0.9 22 > 100 Channel catfish' 0.8 22 0.022 Sample Description: Technical material, 87.2%1; emul- 4-00. 0.0114- .034 sifiable concentrate, 2.7V Bluegill' 0.9 22 > 100 SUMMARY OF ACUTE TOXICITY Rainbow trout$ 1.0 12 0.56 0.42-0.74 96-h LC50 Test Stage or Temp 95% CI Channel catfish' 0.8 22 0.019 organism wt (g) (C) (µg/L) 33-0-0. 0.011 .028 Procambarus' IE 12 > 7,000 Bluegill' 0.6 22 14.0 9.4-21.0 Cutthroat trout' 0.6 10 5.3 4.2-6.8 Rainbow trout' 1.0 12 20 12-32 Lake trout' 2.2 12 30 21-43 Fathead minnow' 0.5 5 > 30,000 Bluegill' 1.4 5 22 14-35 Rainbow trout' 0.6 12 35 29-42 NOTE: Alterations in pH and hardness did not appre- ciably affect the toxicity to fish. Aging of test solu- tions for 7 to 21 days lowered toxicity by about one- half. LIGNASAN LIME SULFUR Chemical Name: Calcium polysulfide Alternate Names: Eau Grison, Orthorix Principal Use: Fungicide, acaricide Sample Description: Liquid concentrate, 29% SUMMARY OF ACUTE TOXICITY 96-h LC50 Test Stage or Temp 95% CI organism wt (g) (C) (mgt) Simocephalus 11 15 11a 9-14 Daphnia pulex Il 15 10a 7-15 Rainbow trout 0.8 12 8 Fathead minnow 1.2 18 32b 24-42 Bluegill 1.0 18 49 44-53 Chemical Name: Methyl 2-benzimidazolecarbamate phosphate Alternate Names: Correx, Lignasan BLP Principal Use: Fungicide Sample Description: Technical material, 98.1% ; a48-h EC50. liquid, 0.7%' bTested in hard water, 272 ppm CaCO,.