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Abstract

 

This article in AJ

  1. Vol. 57 No. 6, p. 599-602
     
    Received: Apr 7, 1965


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doi:10.2134/agronj1965.00021962005700060025x

Effects of Nitrogen Level and Osmotic Pressure of the Nutrient Solution on Incidence of Puccinia graminis and Helminthosporium sativum Infection in Merion Kentucky Bluegrass1

  1. Jerry H. Cheesman,
  2. Eliot C. Roberts and
  3. Lois H. Tiffany2

Synopsis

Synopsis

Merion bluegrass grown in solution culture produced lower yields of foliage under low levels of nitrogen and high levels of osmotic pressure than when treated with high nitrogen and low osmotic pressures. Turf was resistant to inoculation with Puccinia graminis Pers. at all treatment combinations. Numbers of Helminthosporium sativum Pammel, King, and Bakke lesions per leaf blade and average size of lesions increased with increasing levels of nitrogen and decreasing osmotic pressure.

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