Biological Control Agents in Plant Disease Control

Whipps, J. M.; McQuilken, M. P.

doi:10.1002/9781444312157.ch3

Cited by 34 publications

(31 citation statements)

References 173 publications

(217 reference statements)

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“…Only when production at the site of biocontrol is demonstrated or when activity is proved by the use of non-producing or over-producing mutants, or reporter strains, the role of metabolites in disease biocontrol can be confirmed (Whipps and McQuilken, 2009). To our knowledge, these types of studies have not been reported for Verticillium biocontrol.…”

Section: Biological Control Of Verticillium Wiltmentioning

confidence: 99%

Desirable Traits of a Good Biocontrol Agent against Verticillium Wilt

et al. 2017

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The soil-borne fungus Verticillium causes serious vascular disease in a wide variety of annual crops and woody perennials. Verticillium wilt is notoriously difficult to control by conventional methods, so there is great potential for biocontrol to manage this disease. In this study we aimed to review the research about Verticillium biocontrol to get a better understanding of characteristics that are desirable in a biocontrol agent (BCA) against Verticillium wilt. We only considered studies in which the BCAs were tested on plants. Most biocontrol studies were focused on plants of the Solanaceae, Malvaceae, and Brassicaceae and within these families eggplant, cotton, and oilseed rape were the most studied crops. The list of bacterial BCAs with potential against Verticillium was dominated by endophytic Bacillus and Pseudomonas isolates, while non-pathogenic xylem-colonizing Verticillium and Fusarium isolates topped the fungal list. Predominant modes of action involved in biocontrol were inhibition of primary inoculum germination, plant growth promotion, competition and induced resistance. Many BCAs showed in vitro antibiosis and mycoparasitism but these traits were not correlated with activity in vivo and there is no evidence that they play a role in planta. Good BCAs were obtained from soils suppressive to Verticillium wilt, disease suppressive composts, and healthy plants in infested fields. Desirable characteristics in a BCA against Verticillium are the ability to (1) affect the survival or germination of microsclerotia, (2) colonize the xylem and/or cortex and compete with the pathogen for nutrients and/or space, (3) induce resistance responses in the plant and/or (4) promote plant growth. Potential BCAs should be screened in conditions that resemble the field situation to increase the chance of successful use in practice. Furthermore, issues such as large scale production, formulation, preservation conditions, shelf life, and application methods should be considered early in the process of selecting BCAs against Verticillium.

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Section: Biological Control Of Verticillium Wiltmentioning

confidence: 99%

Desirable Traits of a Good Biocontrol Agent against Verticillium Wilt

et al. 2017

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“…In protecting plants from various stresses, biological control methods are becoming important [3]. The main direction in the biological protection of plants is the use of biological products based on various biological agents (biological control agents (BCAs)) [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of various biological control agents (BCAs) on drought resistance and spring barley productivity

et al. 2020

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The aim of the article is to study the effect of various biological agents of biofungicides on plant resistance to drought and formation of spring barley crops. Endophytic bacteria (Bacillus subtilis), rhizospheric bacteria (Pseudomonas fluorescens), actinomycetes (Streptomyces sp.), and micromycetes (Trichoderma viride) were used as bioagents of biofungicides. Preparations based on biological agents were used to treat spring barley seeds. The studies were carried out in laboratory and field conditions. In the conditions of the model artificial acute drought, it was found that seed treatment with Streptomyces sp. Stimulates the leaf and root growth, as well as increases peroxidase activity in the leaves. The maximum content of proline was during seed treatment with Pseudomonas fluorescens. An increase in the content of chlorophyll was observed when treating with Trichoderma viride seeds. In the field conditions, Pseudomonas putida and Streptomyces were more efficient by the content of proline in seedlings. In terms of the spring barley yield, seed treatment with Streptomyces sp., Pseudomonas putida and Bacillus subtilis was more efficient. Streptomyces sp., Pseudomonas putida and Bacillus subtilis are promising for increasing barley resistance to drought.

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“…Moreover, to successfully manage chestnut blight, we have to consider not only biological aspects underlying hypovirulence, but also those regarding specifically the treatment, that is, the release of hypovirulent strains. Components of hypovirulent mycelium formulations and delivery methods are often underestimated issues; however, they can deeply contribute to the success of biopesticides (Whipps and McQuilken ). The stability of the inoculum, the widespread distribution and prompt bioavailability are all fundamental requirements for an effective biocontrol.…”

Section: Introductionmentioning

confidence: 99%