Modes of Action of Microbial Biocontrol Agents against Plant Diseases

Turc, Estelle; Pressecq, Thomas; Nicot, Philippe C.; Bardin, Marc

doi:10.1079/9781789249200.0003

Cited by 3 publications

(1 citation statement)

References 92 publications

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“…One more sustainable control measure is the use of biological control agents (BCAs), which are coming into focus as an eco-friendly alternative for chemical-synthetic plant protection products [13,25,26]. BCAs, including bacteria, fungi, yeasts or viruses, achieve their suppressive effects through one or a combination of several modes of action, e.g., competition for nutrients or space, antibiosis, induction of plant resistance and hyper-parasitism [27,28]. BCAs should effectively establish themselves on the plant, thereby diminishing pathogen infection, inhibiting their growth, propagation and toxin accumulation [25].…”

Section: Introductionmentioning

confidence: 99%

Hyperspectral Imaging and Selected Biological Control Agents for the Management of Fusarium Head Blight in Spring Wheat

Rieker,

Lutz,

El-Hasan

et al. 2023

Plants

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Fusarium spp. are important pathogens on cereals, capable of causing considerable yield losses and significantly reducing the quality of harvested grains due to contamination with mycotoxins. The European Union intends to reduce the use of chemical-synthetic plant protection products (csPPP) by up to 50% by the year 2030. To realize this endeavor without significant economic losses for farmers, it is crucial to have both precise early detection of pathogens and effective alternatives for csPPP. To investigate both the early detection of Fusarium head blight (FHB) and the efficacy of selected biological control agents (BCAs), a pot experiment with spring wheat (cv. ‘Servus’) was conducted under semi-field conditions. Spikes were sprayed with different BCAs prior to inoculation with a mixture of F. graminearum and F. culmorum conidia. While early detection of FHB was investigated by hyperspectral imaging (HSI), the efficiency of the fungal (Trichoderma sp. T10, T. harzianum T16, T. asperellum T23 and Clonostachys rosea CRP1104) and bacterial (Bacillus subtilis HG77 and Pseudomonas fluorescens G308) BCAs was assessed by visual monitoring. Evaluation of the hyperspectral images using linear discriminant analysis (LDA) resulted in a pathogen detection nine days post inoculation (dpi) with the pathogen, and thus four days before the first symptoms could be visually detected. Furthermore, support vector machines (SVM) and a combination of LDA and distance classifier (DC) were also able to detect FHB symptoms earlier than manual rating. Scoring the spikes at 13 and 17 dpi with the pathogen showed no significant differences in the FHB incidence among the treatments. Nevertheless, there is a trend suggesting that all BCAs exhibit a diminishing effect against FHB, with fungal isolates demonstrating greater efficacy compared to bacterial ones.

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Section: Introductionmentioning

confidence: 99%

Hyperspectral Imaging and Selected Biological Control Agents for the Management of Fusarium Head Blight in Spring Wheat

Rieker,

Lutz,

El-Hasan

et al. 2023

Plants

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Alternatives to chemical pesticides: the role of microbial biocontrol agents in phytopathogen management: a comprehensive review

Beyari

2024

J Plant Pathol

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Managing fruit rot diseases of Vaccinium corymbosum

Neugebauer,

Mattupalli,

et al. 2024

Front. Plant Sci.

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Blueberry is an important perennial fruit crop with expanding consumption and production worldwide. Consumer demand for blueberries has grown due to the desirable flavor and numerous health benefits, and fresh market production in the U.S. has risen in turn. U.S. imports have also increased to satisfy year-round consumer demand for fresh blueberries. Pre- and post-harvest fruit diseases such as anthracnose (caused by Colletotrichum spp.) and botrytis fruit rot (caused by Botrytis spp.) have a significant impact on fruit quality and consumer acceptance. These are also among the most difficult diseases to control in the blueberry cropping system. These latent pathogens can cause significant losses both in the field, and especially during transport and marketplace storage. Although both diseases result in rotted fruit, the biology and infection strategies of the causal pathogens are very different, and the management strategies differ. Innovations for management, such as improved molecular detection assays for fungicide resistance, postharvest imaging, breeding resistant cultivars, and biopesticides have been developed for improved fruit quality. Development and integration of new strategies is critical for the long-term success of the blueberry industry.

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Modes of Action of Microbial Biocontrol Agents against Plant Diseases

Cited by 3 publications

References 92 publications

Hyperspectral Imaging and Selected Biological Control Agents for the Management of Fusarium Head Blight in Spring Wheat

Hyperspectral Imaging and Selected Biological Control Agents for the Management of Fusarium Head Blight in Spring Wheat

Alternatives to chemical pesticides: the role of microbial biocontrol agents in phytopathogen management: a comprehensive review

Managing fruit rot diseases of Vaccinium corymbosum

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