Effect of ‘Lunwenyisaoguang’ Fungicide Derived from a Traditional Chinese Herbal Medicine against Apple Branch and Stem Ring Disease

doi:10.16409/j.cnki.2095-039x.2021.04.008

Abstract

Abstract: Apple stem ring disease is a fungal disease that significantly impacts apple production in the maritime Pacific Northwest and regions with similar climates. Thus, it is essential to discover effective agents against the disease. Chinese herbal medicines are getting significant attention for the prevention and control of plant diseases. Thus, in this study, a newly Chinese herbal medicine sourced fungicide product ‘Lunwenyisaoguang’ was selected to investigate its effect on apple stem ring disease. Four commonly used assays were conducted including laboratory toxicity assays, inhibition of spore germination assays, in vitro shoots efficacy assays, as well as field efficacy assays. The results showed that ‘Lun wenyisaoguang’ had 100% inhibitory activities on mycelial growth, conidium production, and spore germination. In vitro shoots efficacy assays indicated that the protective efficacy and therapeutic efficacy of ‘Lunwenyisaoguang’ were 68.06% and 87.26%, respectively. Field trials demonstrated that the control efficacy of the fungicide against the apple stem ring disease reached 100% after scraping off disease spots. Taken together, ‘Lunwenyisaoguang’ is a new effective candidate herbal medicine sourced fungicide for control of the apple stem ring disease.

Key words: Botryosphaeria dothidea, "Lunwenyisaoguang", inhibitory effect, control effect

CLC Number:

S476

ZHANG Jie, LIU Yuanyuan, ZHU Huiying, WANG Xinru, LI Yan, LI Huiping. Effect of ‘Lunwenyisaoguang’ Fungicide Derived from a Traditional Chinese Herbal Medicine against Apple Branch and Stem Ring Disease[J]. Chinese Journal of Biological Control, 2021, 37(5): 1050-1057.

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