The Influence Of Npk Fertilization Rates On Susceptibility To Powdery Mildew Of Field-Grown Winegrapes

M. Reuveni, A. Naor, R. Reuveni, M. Shimoni, B. Bravdo

Research output: Contribution to journalArticlepeer-review

Abstract

Field-grown ‘Sauvignon Blanc’ winegrapes fertigated with various concentrations of N:P:K (7:3:7) for four consecutive years (1988-1991) were evaluated for susceptibility to powdery mildew (Uncinuta necator). Vines fertilized with low NPK concentrations were significantly more susceptible to disease than plants fertilized with high levels. The number of powdery mildew-infected clusters and the severity of the infection were much greater on plants fertilized with a low level of NPK (about 50%), as compared to those of the high fertilization levels (9.5%). In addition, total proteins content and ß-1,3-glucanase activity in berries from low NPK-fertil- ized plants was greater than that of the high fertilization level in plants.

Original languageEnglish
Pages (from-to)31-41
Number of pages11
JournalJournal of Small Fruit and Viticulture
Volume2
Issue number1
DOIs
StatePublished - 12 Jan 1994

Keywords

  • Disease susceptibility
  • Powdery mildew
  • Uncinuta necator
  • Winegrapes

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Environmental Science (all)
  • Horticulture
  • Earth and Planetary Sciences (all)

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