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This article in AJ

  1. Vol. 48 No. 2, p. 71-73
     
    Received: Oct 12, 1955
    Published: Feb, 1956


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doi:10.2134/agronj1956.00021962004800020007x

The Relationships of Varieties and Fertilization to Observed Symptoms of Root Rots and Wilt of Alfalfa1

  1. R. K. Stivers,
  2. W. A. Jackson,
  3. A. J. Ohlrogge and
  4. R. L. Davis2

Synopsis

Synopsis

At 3 rates of N, P, and K, in north central Indiana, the stand of 3rd year Buffalo alfalfa was poorer than Ranger and Grimm at the lowest rate, with less difference at the higher rates. More Buffalo plants had rot from the crown into the root, and at greater severity, than the other 2. For all varieties, percentage of plants with rot into the roots was highest at the lowest fertilization rate; percentage infected plants with crown rot alone was highest at the highest fertilization rate. Stands and yields of Grimm were poorer than the other 2 in the 4th and 5th year at all rates. Bacterial wilt was more severe (non-significantly) at the lowest rate of fertilization.

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