Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (8): 1956-1961.DOI: 10.16178/j.issn.0528-9017.20250200

Previous Articles     Next Articles

Indoor toxicity and synergistic effect of 5 fungicides on twig blight disease of bayberry

CHEN Liping1(), SHANG Liangting2, LIU Xiaoling3, XU Mingfei1, REN Haiying4, ZHOU Qianqian1, WU Changxing1,*()   

  1. 1. Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021,Zhejiang
    2. Wencheng County Modern Agriculture and Health Industry Research Institute, Wencheng 325399, Zhejiang
    3. Agricultural Industry Development Center of Wencheng County Agriculture and Rural Bureau, Wencheng 325399, Zhejiang
    4. Institute of Horticulture,Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang
  • Received:2025-03-16 Online:2025-08-11 Published:2025-09-04

Abstract:

To screen suitable fungicides and their mixtures for controlling twig blight disease of bayberry, the mycelial growth rate method was used to determine the toxicity of five fungicides (triadimenol, triadimefon, flutriafol, tebuconazole, and trifloxystrobin) against the pathogens of twig blight disease. Additionally, the combined toxicity of tebuconazole and trifloxystrobin mixtures was evaluated. The toxicity of the five fungicides against the YS26 strain of the pathogen, ranked from highest to lowest, was as follows: tebuconazole > trifloxystrobin > triadimenol > flutriafol > triadimefon. For the XJ27 strain, the ranking was: tebuconazole > trifloxystrobin > flutriafol > triadimenol > triadimefon. The combination of tebuconazole and trifloxystrobin exhibited additive or synergistic effects against both YS26 and XJ27 strains. At a mass ratio of 3∶1 (tebuconazole∶trifloxystrobin), the mixture showed synergistic effects against both strains, with synergistic coefficients of 1.597 2 and 1.715 9, respectively. Other ratios demonstrated additive effects or synergy against a single strain. The 3∶1 mass ratio of tebuconazole and trifloxystrobin exhibited strong in vitro activity against bayberry twig blight disease, making it a promising candidate for field application.

Key words: bayberry twig blight disease, fungicides, toxicity determination, combined toxicity

CLC Number: