Bioassimilable sulphur provides effective control of Oidium neolycopersici in tomato, enhancing the plant immune system

BACKGROUND Developments of alternatives to the use of chemical pesticides to control pests are focused on the induction of natural plant defences. The study of new compounds based on liquid bioassimilable sulphur and its effect as an inductor of the immune system of plants would provide an alternati...

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Published in:Pest management science 2017-05, Vol.73 (5), p.1017-1023
Main Authors: Llorens, Eugenio, Agustí‐Brisach, Carlos, González‐Hernández, Ana I, Troncho, Pilar, Vicedo, Begonya, Yuste, Teresa, Orero, Mayte, Ledó, Carlos, García‐Agustín, Pilar, Lapeña, Leonor
Format: Article
Language:English
Subjects:
Airborne microorganisms
Ascomycota - drug effects
Ascomycota - physiology
bioassimilable sulphur
Chlorophyll - metabolism
Crop diseases
Glucans - metabolism
Hydrogen Peroxide - metabolism
Immune response
Immune system
induced resistance
Lycopersicon esculentum
Lycopersicon esculentum - drug effects
Lycopersicon esculentum - immunology
Lycopersicon esculentum - metabolism
Lycopersicon esculentum - microbiology
Oidium
Oidium neolycopersici
Pathogens
Pest control
Pesticides
Plant Diseases - immunology
Plant Diseases - microbiology
Plant Growth Regulators - metabolism
Plant pathology
Plant resistance
Solanum lycopersicum
Sulfur
Sulfur - metabolism
Sulfur - pharmacology
Tomatoes
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Summary:BACKGROUND Developments of alternatives to the use of chemical pesticides to control pests are focused on the induction of natural plant defences. The study of new compounds based on liquid bioassimilable sulphur and its effect as an inductor of the immune system of plants would provide an alternative option to farmers to enhance plant resistance against pathogen attacks such as powdery mildew. In order to elucidate the efficacy of this compound in tomato against powdery mildew, we tested several treatments: curative foliar, preventive foliar, preventive in soil drench and combining preventive in soil drench and curative foliar. RESULTS In all cases, treated plants showed lower infection development, better physiological parameters and a higher level of chlorophyll. We also observed better performance in parameters involved in plant resistance such as antioxidant response, callose deposition and hormonal levels. CONCLUSION The results indicate that preventive and curative treatments can be highly effective for the prevention and control of powdery mildew in tomato plants. Foliar treatments are able to stop the pathogen development when they are applied as curative. Soil drench treatments induce immune response mechanisms of plants, increasing significantly callose deposition and promoting plant development. © 2016 Society of Chemical Industry
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.4419