Oecologia

, Volume 80, Issue 2, pp 211–214 | Cite as

Effects of experimental design and nitrogen on cabbage butterfly oviposition

  • D. K. Letourneau
  • L. R. Fox
Original Papers

Summary

To test the prediction that P. rapae egg densities increase with N fertilizer in large-scale systems as they do in model systems with potted plants, we used field experiments with Brassica oleracea var. acephala L. (collards and kale) planted in pots or large field plots, and treated with different levels of nitrogen fertilizer. In small-scale field experiments with potted kale and collards, egg densities were significantly higher on plants with high N than those with low N. But in larger scale experiments with field-grown collards, average seasonal P. rapae egg densities were not significantly correlated with leaf N content. These differences among experiments did not depend on the magnitude of the difference in foliage N levels.

Key words

Pieris rapae Nitrogen Brassica Insect-plant interactions Nutritional ecology 

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • D. K. Letourneau
    • 1
  • L. R. Fox
    • 2
  1. 1.Board of Environmental StudiesUniversity of CaliforniaSanta CruzUSA
  2. 2.Department of BiologyUniversity of CaliforniaSanta CruzUSA

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