Influence of Deleterious Rhizobacteria on Leafy Spurge (<i>Euphorbia esula</i>) Roots

Brinkman, M. A.; Clay, Sharon A.; Kremer, Robert J.

doi:10.1017/s0890037x00042317

Cited by 16 publications

(7 citation statements)

References 17 publications

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“…It is possible that in soils of different clay content and mineralogy, suppressive activity of introduced bacteria and phytotoxicity of natural product amendments may be influenced by formulation composition and characteristics of the selected bacterial strain. For example, Pseudomonas fluorescens DRB strains formulated in semolina, used in South Dakota for control of leafy spurge (Euphorbia esula L.), effectively colonized roots similarly at all sites, even though soils at each site differed in clay contents (Brinkman, Clay, and Kremer 1999).…”

Section: Discussionmentioning

confidence: 99%

Weed Suppression by Deleterious Rhizobacteria is Affected by Formulation and Soil Properties

Zdor

Alexander

Kremer

2005

Communications in Soil Science and Plant Analysis

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Deleterious rhizobacteria (DRB) suppress weed growth in field tests and are considered potential weed biological control agents. This study compared the relative inhibitory action of the DRB Pseudomonas fluorescens strain G2-11 in different formulations, corn gluten meal (CGM), and semolina flour, toward wheat (Triticum aestivum L.), green foxtail (Setaria viridis (L.) Beauv.), and velvetleaf (Abutilon theophrasti Medik) seeds and seedlings in soil assays. Strain G2-11 successfully established in semolina flour as an inoculum formulation but was incompatible with CGM presumably because of antibacterial factors present. The effect of DRB and plant products on seed germination and plant growth were influenced by soil, with the strongest effects seen in fine sandy loam. Semolina flour alone reduced root growth of all target plants except for velvetleaf in silt loam. Green foxtail seed germination was greatly reduced by strain G2-11. With the exception of wheat seedling growth, strain G2-11 enhanced growth-suppressive qualities of semolina flour. Results suggest that natural plant products such as CGM and semolina flour alone and formulated with

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Section: Discussionmentioning

confidence: 99%

Weed Suppression by Deleterious Rhizobacteria is Affected by Formulation and Soil Properties

Zdor

Alexander

Kremer

2005

Communications in Soil Science and Plant Analysis

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“…) and P. fluorescens LS102 and LS174 against leafy spurge ( Euphorbia esula ) (Brinkman et al . ). Talc powder dry formulations have been considered as a simple and cost‐ and time‐effective technique.…”

Section: Introductionmentioning

confidence: 97%

Formulation development of the deleterious rhizobacterium Pseudomonas trivialis X33d for biocontrol of brome (Bromus diandrus ) in durum wheat

2012

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Aim: To develop an appropriate formulation of the deleterious rhizobacterium Pseudomonas trivialis X33d and to evaluate its effectiveness to reduce brome growth. Methods and Results: Two formulations of Ps. trivialis X33d, a semolinakaolin granular formulation (Pesta) and talc-kaolin powder, were prepared and their effectiveness in reducing brome growth was evaluated. Both brome suppression and cell viability of X33d were higher in Pesta granular formulation than in talc-kaolin powder one. The impact of storage temperature and the addition of adjuvants (sucrose and oil) to the granular formulation of X33d were assessed in order to improve the shelf life of the formulation. The longest viability was found in formulated product supplemented with adjuvants and stored at 4°C. The effect of Pesta granules supplemented with adjuvants and stored for 6 months at 4°C on brome and wheat growth under controlled and greenhouse conditions was evaluated. The X33d formulation in Pesta increased the growth of wheat and reduced brome growth. Conclusion: Our results indicate that Ps. trivialis X33d formulated in Pesta has potential as a bioherbicide to control brome. Significance and Impact of the Study: Because of the impracticality of applying bacterial cell suspension on a large scale, the use of Pesta granules of X33d against brome could help in achieving a sustainable agriculture application of a bioherbicide.

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“…Biocontrol activity on leafy spurge leading to significant growth suppression [76] Flavobacterium sp. Sugar beet Axenic IAA production Decreased root elongation and increased shoot to root ratio [67] Enterobacter taylorae Bindweed Axenic IAA production 90.5% reduction in root growth, phytotoxic activity [77] Pseudomonas fluorescens Leafy spurge Field Auxin production to phytotoxic levels Reduced cell membrane integrity, inhibited root growth [60] Streptomyces saganonensis Barnyard grass, goose grass, and tufted manna grass ND Herbicidine (vi) Biocontrol activity [78] Pseudomonas syringae strain 3366 Corn spurry and fireweed Pot Phytotoxin production Germination inhibition, reduced root, and shoot growth [79] Pseudomonas syringae pv. tagetis Annual bluegrass Field ND Greater than 70% weed control [57] 9 Table 3.…”

Section: Leafy Spurge Greenhouse Exopolysaccharide and Hcn Productionmentioning

confidence: 99%

Application Potentials of Plant Growth Promoting Rhizobacteria and Fungi as an Alternative to Conventional Weed Control Methods

Mustafa¹,

Naveed²,

Saeed³

et al. 2020

Sustainable Crop Production

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Weeds are the plants usually grown on unwanted places and are notorious for causing interruptions in agricultural settings. Remarkable yield losses have been reported in fields infested with weeds worldwide. So far, these weeds cause about 34% of losses to yields of major agricultural crops and pose threats to economic condition of the farmers. Conventionally, weed control was achieved by the use of chemical herbicides and traditional agronomic practices. But these methods are no more sustainable as the magnitude of threats imposed by these conventionally outdated methods such as chemical herbicides is greater than the benefits achieved and their continuous use has disturbed biodiversity and weed ecology along with herbicide resistance in some weeds. Herbicide residues are held responsible for human health hazards as well. Therefore the future of weed control is to rely on alternative approaches which may be biological agents such as bacteria and fungi. This chapter highlights the potentials of using bacterial and fungal biocontrol agents against weeds in farmer fields. Moreover, detailed review on merits and demerits of conventional weed control methods is discussed in this chapter.

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Influence of Deleterious Rhizobacteria on Leafy Spurge (Euphorbia esula) Roots

Cited by 16 publications

References 17 publications

Weed Suppression by Deleterious Rhizobacteria is Affected by Formulation and Soil Properties

Weed Suppression by Deleterious Rhizobacteria is Affected by Formulation and Soil Properties

Formulation development of the deleterious rhizobacterium Pseudomonas trivialis X33d for biocontrol of brome (Bromus diandrus ) in durum wheat

Application Potentials of Plant Growth Promoting Rhizobacteria and Fungi as an Alternative to Conventional Weed Control Methods

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