Acta Agriculturae Zhejiangensis ›› 2026, Vol. 38 ›› Issue (7): 1388-1399.DOI: 10.3969/j.issn.1004-1524.20250558

• Plant Protection • Previous Articles     Next Articles

Biological characteristics of Botrytis cinerea (gray mold) of lily in Zhejiang Province of China and screening of their control fungicides

JIANG Yuanjun1,2(), FU Manman2, CHENG Fan1, WU Chao2,*()   

  1. 1 Hubei Key Laboratory of Natural Products Research and Utilization, College of Biological & Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, Hubei, China
    2 Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2025-08-26 Online:2026-07-25 Published:2026-08-20

Abstract:

To systematically investigate the growth patterns of the pathogen causing lily gray mold and its sensitivity to fungicides in Zhejiang Province, this study obtained the pathogenic strain HM-G through isolation and purification. The species of the strain was identified by combining morphological observation and molecular biological analysis, while its optimal growth conditions were determined via biological characteristic assessment. Additionally, the pathogenicity of HM-G toward different lily cultivars was evaluated under in vitro inoculation conditions, and the inhibitory effects of 16 fungicides were screened using the plate confrontation method. The results showed that strain HM-G was identified as Botrytis cinerea(the causal agent of gray mold). Its optimal growth medium was PDA medium, with the optimal temperature being 25 ℃, and mycelial growth was fastest under a 12 h/12 h light-dark cycle. In the pathogenicity assessment, 12 lily cultivars exhibited a disease index of over 40, among which 5 cultivars had a total incidence rate exceeding 70%. For fungicide screening, 50% carbendazim (500-fold dilution, with an inhibition rate of 39.41%) and 400 g·L-1 pyrimethanil (625-fold dilution, with an inhibition rate of 42.80%) showed significant inhibitory effects on HM-G. Meanwhile, strain HM-G displayed characteristics of high-temperature sensitivity, obvious drug resistance, strong infectivity, and high incidence rate. This study clarified the main pathogenic type and growth characteristics of lily gray mold in Zhejiang Province, providing a theoretical basis for formulating prevention and control strategies against this disease and advancing disease-resistant breeding efforts for lilies in the region.

Key words: lily, Botrytis cinerea, biological characteristic, fungicide screening

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