Effects of fertilization on thrips and downy mildew incidence and on the yield of onion

Authors

  • Paulo Antônio de Souza Gonçalves Epagri/Estação Experimental de Ituporanga
    • João Américo Wordell Filho Epagri/Estação Experimental de Ituporanga
      • Claudinei Kurtz Epagri/Estação Experimental de Ituporanga

        DOI:

        https://doi.org/10.52945/rac.v22i1.808

        Keywords:

        Thrips tabaci, Peronospora destructor, All, nitrogen, phosphorus, potassium

        Abstract

        The objective of this research was to evaluate the effect of fertilization with nitrogen, phosphorus and
        potassium on thrips (Thrips tabaci) and downy mildew (Peronospora destructor), and on the yield of onion crop. The treatments were controls, half, one, two and four times the recommended amount of N, P2O5 e K2O. In the experiment with nitrogen the turkey manure was included to supply the recommended amount of nutrients. The onion thrips and downy mildew incidence were not influenced by the nutrients; only phosphorus had a positive linear tendency with the development of the insect. The yield increased mainly as a result of the use of phosphorus.

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        Published

        2009-01-26

        Issue

        Vol. 22 No. 1 (2009)

        Section

        Scientific article

        License

        Copyright (c) 2009 Agropecuária Catarinense Journal

        Creative Commons License

        This work is licensed under a Creative Commons Attribution 4.0 International License.

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        How to Cite

        Effects of fertilization on thrips and downy mildew incidence and on the yield of onion. (2009). Agropecuária Catarinense Journal, 22(1), 57-60. https://doi.org/10.52945/rac.v22i1.808