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Phytoparasitica

, Volume 31, Issue 4, pp 399–409 | Cite as

Synergistic interaction between BABA and mancozeb in controllingPhytophthora infestans in potato and tomato andPseudoperonospora cubensis in cucumber

  • Alexander Baider
  • Yigal CohenEmail author
Phytopathology/Mycology

Abstract

Spray mixtures consisting of the plant activator BABA (DL-3-aminobutyric acid) and the protectant fungicide mancozeb were significantly more effective than BABA or mancozeb alone in controlling late blight (Phytophthora infestans) in potato and tomato and downy mildew (Pseudoperonospora cubensis) in cucumber. A mixture composed of 5 parts BABA and 1 part mancozeb (w/w, a.i.) exhibited a higher synergy factor than the 1+1 or the 1+5 (BABA + mancozeb) mixtures. No synergistic interaction was detected between BABA plus mancozeb in controlling sporangial or cystospore germination, nor mycelial growth ofP. infestans in vitro. The results showed enhanced effect of mancozeb in BABA-induced plants, suggesting, therefore, that lower dosages of this fungicide may be sufficient to control late blight or downy mildew under field conditions.

Key words

Induced resistance BABA mancozeb fungicide Pseudoperonospora cubensis downy mildew Phytophthora infestans late blight 

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Copyright information

© Springer Science + Business Media B.V. 2003

Authors and Affiliations

  1. 1.Faculty of Life SciencesBar-Ilan UniversityRamat GanIsrael

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