Efficiency of inoculation methods for the assessment of bacterial halo blight in coffee seedlings

IF 1.1 4区 农林科学 Q3 PLANT SCIENCES Journal of Phytopathology Pub Date : 2024-06-14 DOI:10.1111/jph.13336
J. M. Oliveira, E. A. Pozza, L. L. Belan, M. L. O. Freitas, V. M. Tedardi
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Abstract

Bacterial halo blight (BHB), caused by Pseudomonas coronafaciens pv. garcae (Pcg), is one of the most significant diseases affecting coffee trees worldwide, resulting in considerable damage and notable losses within coffee production systems. Further research into the epidemiology and aetiology of BHB in coffee plants is essential for developing effective management strategies. Understanding the efficiency of each inoculation methodology in inducing symptoms is crucial for advancing this research. Therefore, this study aimed to assess the efficiency of seven Pcg inoculation methods using five concentrations to enhance the highest BHB intensity. The experimental design was a complete randomized block design in a factorial (7 × 5) variance analysis with four replications. The first three pairs of leaves of coffee seedlings of the cultivar Catuaí Vermelho IAC-99 were inoculated and evaluated for the incidence and severity of BHB. The inoculation methods of Pcg by injury provided higher BHB AUDPCI and AUDPCS values. Among these, the inoculum injection and multi-needle wounding at inoculum concentrations of 1.6 × 109 CFU mL−1 demonstrated higher disease intensity.

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评估咖啡幼苗细菌性晕疫病的接种方法的效率
由 Pseudomonas coronafaciens pv. garcae(Pcg)引起的细菌性晕疫病(BHB)是影响全球咖啡树的最主要病害之一,在咖啡生产系统中造成了相当大的破坏和显著的损失。要制定有效的管理策略,就必须进一步研究咖啡植物中 BHB 的流行病学和病原学。了解每种接种方法在诱发症状方面的效率对于推进这项研究至关重要。因此,本研究旨在评估使用五种浓度的七种 Pcg 接种方法的效率,以提高最高的 BHB 强度。实验设计为完全随机区组设计,采用因子(7 × 5)方差分析,四次重复。接种了 Catuaí Vermelho IAC-99 栽培品种咖啡幼苗的前三对叶片,并对 BHB 的发生率和严重程度进行了评估。通过损伤接种 Pcg 的方法可获得较高的 BHB AUDPCI 和 AUDPCS 值。其中,接种体浓度为 1.6 × 109 CFU mL-1 的接种体注射和多针刺伤的病害强度更高。
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来源期刊
Journal of Phytopathology
Journal of Phytopathology 生物-植物科学
CiteScore
2.90
自引率
0.00%
发文量
88
审稿时长
4-8 weeks
期刊介绍: Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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