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This article in CS

  1. Vol. 12 No. 1, p. 117-118
    Received: Apr 29, 1971

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Perennial Ryegrass Varietal Response to Maleic Hydrazide1

  1. L. W. Nittler and
  2. T. J. Kenny2



Maleic hydrazide applied as a soil drench to 13-day-old perennial ryegrass (Lolium perenne L.) caused leaves of many plants to become chlorotic. Varieties differed in percentage of chlorotic plants and conversely in percentage of green plants. ‘Manhattan’ had significantly fewer chlorotic plants than other varieties tested. Photoperiods (ranging from 9.5 to 14 hours) and concentrations (300 ppm compared to 600 ppm) did not alter varietal response greatly.

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