Activity of OSBPI fungicide fluoxapiprolin against plant-pathogenic oomycetes and its systemic translocation in plants

IF 4.2 1区农林科学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Pesticide Biochemistry and Physiology Pub Date : 2024-08-13 DOI:10.1016/j.pestbp.2024.106085

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Abstract

Fluoxapiprolin, a novel piperidinyl thiazole isoxazoline fungicide, was developed by Bayer Crop Science in 2012. Despite its well-documented inhibitory activity against plant pathogenic oomycetes such as Phytophthora capsici and Phytophthora infestans, limited information regarding its antifungal spectrum and protective and curative activity is available. Fluoxapiprolin exhibited strong inhibitory activity against Phytophthora spp. and several Pythium spp., with EC₅₀ values ranging from 2.12 × 10⁻⁴ to 2.92 μg/mL. It was much more effective against P. capsici in inhibiting mycelial growth, sporangium production, and cystospore germination than at reducing zoospore release. Moreover, fluoxapiprolin displayed both protective and curative activity against P. capsici infection in pepper plants under greenhouse conditions, with systemic translocation capability confirmed by High Performance Liquid Chromatography (HPLC) analysis. The results demonstrated the strong inhibitory activity of fluoxapiprolin against economically important plant oomycete pathogens, including Phytophthora spp. and several Pythium spp., and its certain translocation activity in pepper plants.

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OSBPI 杀菌剂氟唑菌酰胺对植物致病性卵菌的活性及其在植物体内的系统迁移

Fluoxapiprolin 是一种新型哌啶基噻唑异噁唑啉类杀菌剂，由拜耳作物科学公司于 2012 年开发。尽管其对植物病原卵菌（如疫霉属和疫霉属）的抑制活性已得到充分证实，但有关其抗真菌谱、保护和治疗活性的信息却十分有限。Fluoxapiprolin 对疫霉属（Phytophthora spp.）和几种疫霉属（Pythium spp.）具有很强的抑制活性，EC50 值从 2.12 × 10-4 到 2.92 μg/mL 不等。在抑制菌丝生长、孢子囊产生和子囊孢子萌发方面，氟唑菌酰胺比减少子囊孢子释放更有效。此外，在温室条件下，氟唑虫酰胺对辣椒植株的蘑菇伞菌感染具有保护和治疗活性，高效液相色谱（HPLC）分析证实了其系统转移能力。研究结果表明，氟唑禾草灵对具有重要经济价值的植物卵菌病原体（包括疫霉属和几种疫霉属）具有很强的抑制活性，并且在辣椒植株中具有一定的转座活性。

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来源期刊

Pesticide Biochemistry and Physiology 生物-昆虫学

CiteScore

7.00

自引率

8.50%

发文量

238

审稿时长

4.2 months

期刊介绍： Pesticide Biochemistry and Physiology publishes original scientific articles pertaining to the mode of action of plant protection agents such as insecticides, fungicides, herbicides, and similar compounds, including nonlethal pest control agents, biosynthesis of pheromones, hormones, and plant resistance agents. Manuscripts may include a biochemical, physiological, or molecular study for an understanding of comparative toxicology or selective toxicity of both target and nontarget organisms. Particular interest will be given to studies on the molecular biology of pest control, toxicology, and pesticide resistance. Research Areas Emphasized Include the Biochemistry and Physiology of: • Comparative toxicity • Mode of action • Pathophysiology • Plant growth regulators • Resistance • Other effects of pesticides on both parasites and hosts.