Bio efficacy of indigenous biological agents and selected fungicides against branch canker disease of (Macrophoma theicola) tea under field level

Jeyaraman, Mareeswaran; Robert, Premkumar Samuel Asir

doi:10.1186/s12870-018-1445-8

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…This knowledge, together with in vivo assays, would clarify the potential of commercial Bacillus spp. as suitable agents in the biocontrol of Botryosphaeria canker.In this bioassay neither fungi nor bacteria showed any growth in PDAc, demonstrating the toxic effect of the copper salt at the assayed dose Jeyaraman and Robert (2018). reported that a mixed treatment of B. amyloliquefaciens and copper oxychloride resulted in a moderate reduction of cankers caused by Macrophoma theicola Petch (percentage of lesion length reduction in Camellia sp.…”

mentioning

confidence: 75%

“…living microorganism and their metabolites). Bacteria assayed were as follows: (Bt1) aqueous suspension [28.53% w/v, that is 1.42 × 10 9 CFU/ml (Jeyaraman & Robert, 2018) In addition, a variant of AI index, which we named the dual antagonism index (DAI), was also computed as:…”

Section: Inoculation and In Vitro Assessmentmentioning

confidence: 99%

“…Moreover, the Gram-positive genus Bacillus spp. has been suggested as a suitable biocontrol agent against phytopathogens also in combination with copper oxychloride [Cu₂(OH)₃Cl; Jeyaraman & Robert, 2018].…”

Section: Introductionmentioning

confidence: 99%

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Antagonistic effect in vitro of three commercial strains of Bacillus sp. against the forest pathogen Diplodia corticola

et al. 2021

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Botryosphaeria canker is a major threat for Mediterranean forests since it causes severe economic and ecological impacts in productive cork oak (Quercus suber L.) stands in western Europe. The disease is caused by the fungus Diplodia corticola A.J.L. Phillips, A. Alves & J. Luque [Ascomycota, Dothideomycetes, Botryosphaeriaceae; formerly misidentified as Diplodia mutila (Fr.) Mont. (Alves et al., 2004)], causing severe dieback in mature Quercus spp., with necrosis in the stem and branches, and mortality of seedlings. The host range of the pathogen includes several Mediterranean oak species such as Quercus canariensis Willd., Quercus coccifera L., Quercus ilex L. and Q. suber. In cork oak, the pathogen causes branch necrosis and canker in the phelloderm exposed by debarking, which severely limits cork production, reduces the value of the extracted cork and severely reduces the vigour of the infected trees (Luque et al., 2008). The disease has been traditionally treated using chemicals such as benomyl (C 14 H 18 N 4 O 3 ; Benlate/WP, Du Pont Ibérica, S.A.) and thiophanate-methyl (C 12 H 14 N 4 O 4 S 2 ; Pelt/SC, Aventis CropScience España). Nevertheless, European policies for forest management advise against the use of fungicides; the use of benomyl is banned whereas thiophanate-methyl use was permitted until October 2020.As a consequence of these policies, the development of new control methods that reduce or even replace the use of chemicals is urgently

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confidence: 75%

Section: Inoculation and In Vitro Assessmentmentioning

confidence: 99%

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Antagonistic effect in vitro of three commercial strains of Bacillus sp. against the forest pathogen Diplodia corticola

et al. 2021

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“…Some of the strains alone or in the consortium have been commercialized as biocontrol and/or phytostimulants. Application of B. amyloliquefaciens together with commercial fungicides significantly reduces branch canker disease in tea plants under field conditions (51). In a related study, the use of B. amyloliquefaciens together with other microorganisms has been shown to improve the strain's biocontrol potential (52).…”

Section: Biocontrol Of Plant Diseasesmentioning

confidence: 98%

Bacilli as sources of agrobiotechnology: recent advances and future directions

Dame

Rahman

Islam

2021

Green Chemistry Letters and Reviews

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The group bacilli represent the Gram-positive ubiquitous spore-forming bacteria. Their diversity, versatility and the ability of producing diverse secondary metabolites including enzymes created enormous potential for applications in agriculture, biotechnology, environment and medicine. The bacilli are considered as one of the most studied groups of bacteria providing plant growth-promotion and biocontrol of multiple diseases reflecting their vital role in enhancing plants' tolerance to biotic and abiotic stresses. Some of the Bacillus species are available commercially as phytostimulants, biopesticides, and biofertilizers. Genetically engineered plants such as maize, cotton, brinjal with endotoxins producing genes from Bacillus thuringiensis (Bt) has revolutionized agriculture. Many of these applications have been widely adopted in various fields as viable and environmentally friendly alternatives of synthetic chemical fertilizers and pesticides. A better understanding of the biology, ecology, and mechanisms of action of the beneficial strains of bacilli are needed for the development of products to support green biotechnology in agriculture and industries. This report comprehensively reviewed the applications of bacilli in agriculture and industry and discussed their potentials for the development of new products of biotechnological implications.

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“…What makes them remarkable is the mixture of several species of microorganisms that together have a structuring and antioxidant regenerative action that gives them extraordinary effects and a very wide and varied range of applications that are almost limitless [17]. Application of B. amyloliquefaciens as fungicide significantly reduces branch canker disease in tea plants under field conditions [18]. In a related study, the use of B. amyloliquefaciens together with other microorganisms has been shown to improve the strain's biocontrol potential.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Beneficial Microorganisms Bioformulations on the Soil Physicochemical Parameters and the Nutritional Profile of Abelmoschus Esculentus Cultivated in Cameroon

Alexis

Fotso

Martial

et al. 2021

JAERI

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Abelmoschus esculentus, a plant cultivated in tropical and temperate regions throughout the world, is highly appreciated for its various uses. Its culture encounters difficulties, particularly in Cameroon, due to soil infertility. In order to overcome this difficulty, the use of biological fertilizers in order to regenerate agricultural soils for more production is suggested. Three types of formulations were prepared after in vitro compatibilities tests, T1 (B. amyloliquefaciens and T. harzianum); T2 (B. velezensis and B. amyloliquefaciens) and T3 (B. velezensis and T. harzianum) with the aim of improving soil physicochemical; agromorphological and nutritional profile of okra. The plants were cultivated in 4.5 m² plots, arranged in complete randomized blocks design. ANOVA revealed significant differences between T1treatment and the other treatments and with the T0 control in plant height with the growth rate of 1.144cm/day, fruit length (11.53±0.49cm) and the average weight of fruits per treatment (1868.00±279.45g) at the significance level of P<0.05 (Tukey test). The productivity of treatment T1 per hectare (16.604±2.48t/ha) was highly significant compared to the other treatments and the control (8.53±1.49t/ha). Parameters such as disease resistance, leaf area and number of leaves were not significant between treatments but with the control. The values obtained with T1 treatment were high compared to the others. Regarding nutritional properties, the Na, K, Mg, Cu, Fe, Zn, carbohydrates and proteins contents were significantly increased compared to the control with contents values above the same okra variety. These different results may suggest the use of bioformulation with B. amyloliquefaciens and T. harzianum in order to improve soil fertility and to produce a sufficient quantity and quality of biofortified okra.

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Bio efficacy of indigenous biological agents and selected fungicides against branch canker disease of (Macrophoma theicola) tea under field level

Cited by 9 publications

References 15 publications

Antagonistic effect in vitro of three commercial strains of Bacillus sp. against the forest pathogen Diplodia corticola

Antagonistic effect in vitro of three commercial strains of Bacillus sp. against the forest pathogen Diplodia corticola

Bacilli as sources of agrobiotechnology: recent advances and future directions

Influence of the Beneficial Microorganisms Bioformulations on the Soil Physicochemical Parameters and the Nutritional Profile of Abelmoschus Esculentus Cultivated in Cameroon

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