Suppression and Mechanism of Wuyiencin on Grape Gray Mold

doi:10.16409/j.cnki.2095-039x.2023.02.028

Abstract

Abstract: In order to investigate the control effect and mechanism of wuyiencin on grape gray mold, experiments were carried out through inhibition of hyphal growth and conidial germination, determination of callose deposition, and control effect of gray mold on grape leaves and fruits. It was found that wuyiencin could inhibit the hyphal growth of Botrytis cinerea, and when the concentration reached 120 μg/mL, the inhibition effect on the hyphae was 94.3%. When the concentration reached 100 μg/mL, the inhibition rate of wuyiencin on spore germination of B. cinerea could reach 96.0%; When the concentration of wuyiencin reached 120 μg/mL, the control effect on gray mold of grape leaves and fruits were 87.5% and 96.6%, respectively. Wuyiencin could reduce the oxalic acid synthesis capacity of B. cinerea significantly, resulting in weakened pathogenicity, and thereby reducing the infection of B. cinerea to the grape tissue. Wuyiencin could increase the defense ability of grape tissue by inducing callose deposition in grape tissue, thus playing an important role in controlling gray mold. In conclusion, wuyiencin has a good control effect on grape gray mold and can be applied and promoted as a biological control agent.

Key words: biological control, Botrytis cinerea, callose, oxalic acid, grape, wuyiencin

CLC Number:

S476

LI Boya, LU Yanxuan, XIE Jiabei, SHI Liming, ZHANG Kecheng, GE Beibei, RAN Longxian. Suppression and Mechanism of Wuyiencin on Grape Gray Mold[J]. Chinese Journal of Biological Control, 2023, 39(3): 676-683.

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