Scab caused by Venturia nashicola is one of the most serious diseases of Asian pears, and conventional fungicides used to control scab can lose their efficacy when fungicide-resistant strains develop. In contrast, the efficacy of systemic acquired resistance (SAR) inducers, such as acibenzolar-S-methyl (ASM), is regarded as stable because they have complex, orchestrated modes of action. Here, field efficacy and phytotoxicity of ASM on scab were tested during the growing season and after harvest for 3 years. The high efficacy of ASM indicated that it has promise for controlling scab in the field without an unacceptable level of phytotoxicity.
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The authors are grateful to Seiichi Kumagawa, Hita City, Japan for kindly supplying tested pear trees and technical assistance.
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Nakao, S., Watanabe, H., Yano, T. et al. Control efficacy of the systemic acquired resistance (SAR) inducer acibenzolar-S-methyl against Venturia nashicola in Japanese pear orchards. J Gen Plant Pathol 87, 307–315 (2021). https://doi.org/10.1007/s10327-021-01013-w
- Systemic acquired resistance
- Venturia nashicola