Integrated management of peanut smut using Bacillus velezensis CHEP5, resistant genotypes, and a calcium-based amendment for sustainable production

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2025-10-11 DOI:10.1016/j.cropro.2025.107441

Natalia Marcellino , Marcos Darío Bongiovanni , Úrsula Ana Loser , Matías Ezequiel Rovere , Lucía Beatriz Chimento , Edmundo Guillermo Peiretti , Mercedes Alicia Ibañez , María Laura Tonelli

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引用次数: 0

Abstract

Argentina is globally recognized as a leading producer of high-quality peanuts for the export market. However, peanut smut (Thecaphora frezzii) poses a significant threat to peanut production, causing substantial losses in both yield and quality. This study aimed to evaluate the effect of the microbial biocontrol agent Bacillus velezensis CHEP5 (CHEP5), a calcium-based soil amendment (CA; 80 % CaCO₃ + 20 % CaSO₄), and resistant genotypes (Utré and LAx8, with Granoleico as a susceptible control) in reducing disease incidence and severity, and in improving yield, yield components, and nodulation. Three field trials were conducted in Córdoba, Argentina, from 2021 to 2024. Genotypes Utré and LAx8 consistently reduced smut incidence and severity, representing the most effective control strategy. In two of the three seasons, CA and CHEP5 also reduced disease levels, with average reductions in incidence ranging from 16.5 to 60.9 % and in severity from 20.5 to 60.1 %, depending on the genotype. In the wettest season, CA increased grain yield by an average of 10.8 %, while CHEP5 enhanced nodule formation by an average of 15.7 %. These findings support an integrated disease management approach, prioritizing genetic resistance and complemented by soil calcium amendments and microbial biocontrol agents, as a sustainable strategy for controlling peanut smut in Argentina.

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利用velezensis CHEP5、抗性基因型和钙基改良对花生黑穗病进行综合管理，促进可持续生产

阿根廷是全球公认的高品质花生出口市场的主要生产国。然而，花生黑穗病（Thecaphora frezzii）对花生生产构成重大威胁，造成产量和质量的重大损失。本研究旨在评价微生物防菌剂velezensis CHEP5 （CHEP5）、钙基土壤改良剂（CA; 80% CaCO3 + 20% CaSO4）和抗性基因型（utr和LAx8， Granoleico为敏感对照）在降低病害发病率和严重程度、提高产量、产量成分和结瘤方面的效果。从2021年到2024年，在阿根廷Córdoba进行了三次现场试验。基因型utr和LAx8持续降低了黑斑病的发病率和严重程度，代表了最有效的控制策略。在三个季节中的两个季节中，CA和CHEP5也降低了疾病水平，根据基因型的不同，平均发病率降低16.5%至60.9%，严重程度降低20.5%至60.1%。在最湿季节，CA平均增产10.8%，而CHEP5平均增产15.7%。这些发现支持综合疾病管理方法，优先考虑遗传抗性，辅以土壤钙改良剂和微生物生物防治剂，作为阿根廷控制花生黑穗病的可持续战略。

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.