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This article in JEQ

  1. Vol. 2 No. 3, p. 333-334
     
    Received: Sept 15, 1972


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doi:10.2134/jeq1973.00472425000200030003x

Leaf Pubescence of Field Grown Wheat: A Deterrent to Oviposition by the Cereal Leaf Beetle1

  1. R. L. Gallun,
  2. J. J. Roberts,
  3. R. E. Finney and
  4. F. L. Patterson2

Abstract

Abstract

Leaf pubescence, a deterrent to oviposition by the cereal leaf beetle [Oulema melanopus (L.) Diptera Cecidomyiidae], is being bred into wheats in an attempt to replace insecticides as a means of controlling damage by this insect pest. Experimental wheats (Triticum aestivum L.) having more than 71 trichomes/mm2 of flag leaf surface were nonpreferred for oviposition by the cereal leaf beetle compared with Arthur wheat which has 28 trichomes/mm2. The leaf pubescence of three Purdue wheats was responsible for over 94% reduction in the number of eggs that were laid by the beetle and the number of leaves damaged by feeding larvae.

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