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This article in CS

  1. Vol. 8 No. 4, p. 419-421
     
    Received: Mar 14, 1968
    Published: July, 1968


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doi:10.2135/cropsci1968.0011183X000800040007x

Evaluation of Mechanical Damage to Roots of Commercial Varieties of Corn (Zea mays L.)1

  1. Paul J. Fitzgerald,
  2. Eldon E. Ortman and
  3. Terry F. Branson2

Abstract

Abstract

The roots of six commercial varieties of corn, (Zea Mays L.), in 1963 and eight varieties in 1964 and 1965 were mechanically injured to simulate feeding of rootworm larvae. Approximately 0, 25, 50, and 75% of the roots were removed by cutting with a sharpened spade on 1, 2, or 3 dates. Highly significant differences in grain yield and percent lodging resulted from treatments in 1964 and 1965. Differences in percent moisture were significant only in 1964. A highly significant treatment X variety interaction was also present in 1964. The implications of these results in breeding for resistance or tolerance to the corn rootworm are discussed.

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