Effects of fungicide application on susceptible pepper cultivar under southern blight stress

文献类型： 外文期刊

第一作者： Wen, Rong

作者： Wen, Rong;Xing, Dan;Wen, Rong;Liang, Chuanjing;Wang, Yongping;Tu, Dehui;Luo, Zhenyi;Xing, Dan;Song, Dandan;Wu, Zhibing;Twagirayezu, Gratien;Zhang, Shicai;Wu, Kangyun

作者机构：

关键词： Sclerotium rolfsii sacc; Pepper southern blight; Susceptible cultivar; Fungicide; Root system

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 342 卷

页码：

收录情况： SCI

摘要： Pepper plants are being infected by pepper southern blight, a root disease caused by Sclerotium rolfsii Sacc. However, the resistance of several pepper cultivar and the efficacy of chemical fungicides in controlling root diseases has not yet been well elucidated. This study evaluated the response and mechanisms of different pepper cultivar and fungicides to S. rolfsii. The effects of fungicide application on susceptible cultivar under S. rolfsii stress were assessed through a pot experiment. The results indicated that the Layan 101 (P8) variety exhibited the lowest resistance and Qianjiao 8 (P5) had the highest resistance. The In vitro antifungal activity of hexaconazole and azoxystrobin was superior in protective and curative capacities. Hexaconazole exhibited a consistent response, with the highest protective and curative effects (74.77 % / 32.52 %) observed at 50 mu g center dot mL- 1, which was suboptimal for treatment. In contrast, azoxystrobin displayed a dose-dependent effect, achieving protective solid and therapeutic effects (85.41 % / 82.97 %) at 100 mu g center dot mL- 1. These two fungicides inhibited the growth of pathogenic fungi, promoting the stable growth of pepper roots. In addition, they reduced root reactive oxygen burst and increased root peroxidase (POD and CAT) activity. This study serves as a reference for managing pepper southern blight.

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