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Systemic resistance inducer acibenzolar‐S‐methyl (ASM) and its microencapsulated formulations: their long‐lasting control efficacy against cucumber diseases and mitigation of phytotoxicity
Author(s) -
Ishii Hideo,
Fujiwara Masahiro,
Nishimura Kumiko
Publication year - 2019
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.5181
Subject(s) - phytotoxicity , downy mildew , systemic acquired resistance , fungicide , powdery mildew , limiting , biology , microbiology and biotechnology , agronomy , toxicology , horticulture , mechanical engineering , biochemistry , arabidopsis , mutant , gene , engineering
BACKGROUND The development of fungicide resistance by pathogens is a major limiting factor for the control of plant diseases. To combat resistance development, the use of broad‐spectrum but nonfungitoxic resistance inducers such as acibenzolar‐S‐methyl (ASM) is a promising approach because the orchestrated mechanisms underlying systemic acquired resistance induced by ASM are less likely to be overcome easily by pathogens. However, phytotoxicity is the main limiting factor of ASM. RESULTS ASM was highly active at inducing systemic resistance against powdery and downy mildews, the two major cucumber diseases. Based on the duration of the control, ASM effectiveness against these diseases was maintained well in plastic greenhouses and the number of sprays could be reduced. Control efficacy after seed treatment with ASM and the applications of microencapsulated ASM was also high against mildews in pots as well as in greenhouse experiments, with no problematic phytotoxicity. CONCLUSION The use of ASM is a potential integrated pest management‐based tactic to control cucumber powdery and downy mildews because its long‐lasting efficacy allows the application of typical fungicides to be reduced. The risk for resistance development in mildew pathogens will also be reduced. ASM seed treatment as well as soil amendment with microencapsulated ASM is effective in lowering the risk for the phytotoxicity of this compound. © 2018 Society of Chemical Industry