<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>L. L. Marking</dc:contributor>
  <dc:contributor>J.J. Rach</dc:contributor>
  <dc:creator>T.D. Bills</dc:creator>
  <dc:date>1985</dc:date>
  <dc:description>Eggs and nymphs of mayflies (Hexagenia  sp.) were exposed to the lampricides 3-trifluoromethyl-4- nitrophenol (TFM) and 2',5-dichloro-4'-nitrosalcylanilide (Bayer 73) and to a mixture of 98% TFM and 2%  Bayer 73 (TFM-2B) to determine the sensitivity of various life stages to these compounds. Some eggs and newly  hatched nymphs survived concentrations of TFM up to 10 mg/L; and nymphs of the other groups tested (7, 16,  23, and 27 mm long) died at concentrations of 5 mg/L or more. Eggs and nymphs were unaffected by Bayer 73  concentrations up to 0.4 mg/L, the highest concentrations tested.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:language>en</dc:language>
  <dc:title>Toxicity of the lampricides 3-trifluoromethyl-4-nitrophenol (TFM) and 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73) to eggs and nymphs of the mayfly (Hexagenia sp.)</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>