Integrated management of branch canker disease (Macrophoma sp.) in tea under field level

Jeyaraman, Mareeswaran; Robert, Premkumar Samuel Asir

doi:10.1007/s41348-017-0072-1

Cited by 7 publications

(5 citation statements)

References 4 publications

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“…In previous studies, Alternaria and Macrophoma have been found in the salt crusts and roots of halophytes ( You et al, 2012 ; Liu et al, 2014 ). These genera are known plant pathogens that can cause leaf spots and fusarium wilt ( Chaerani and Voorrips, 2006 ; Jeyaraman and Robert, 2017 ). Penicillium has been shown to confer soybean resistance to salt stress ( Khan et al, 2011 ).…”

Section: Discussionmentioning

confidence: 99%

Exploring Microbial Resource of Different Rhizocompartments of Dominant Plants Along the Salinity Gradient Around the Hypersaline Lake Ejinur

et al. 2021

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Lake littoral zones can also be regarded as another extremely hypersaline environment due to hypersaline properties of salt lakes. In this study, high-throughput sequencing technique was used to analyze bacteria and fungi from different rhizocompartments (rhizosphere and endosphere) of four dominant plants along the salinity gradient in the littoral zones of Ejinur Salt Lake. The study found that microbial α-diversity did not increase with the decrease of salinity, indicating that salinity was not the main factor on the effect of microbial diversity. Distance-based redundancy analysis and regression analysis were used to further reveal the relationship between microorganisms from different rhizocompartments and plant species and soil physicochemical properties. Bacteria and fungi in the rhizosphere and endosphere were the most significantly affected by SO42–, SOC, HCO3–, and SOC, respectively. Correlation network analysis revealed the potential role of microorganisms in different root compartments on the regulation of salt stress through synergistic and antagonistic interactions. LEfSe analysis further indicated that dominant microbial taxa in different rhizocompartments had a positive response to plants, such as Marinobacter, Palleronia, Arthrobacter, and Penicillium. This study was of great significance and practical value for understanding salt environments around salt lakes to excavate the potential microbial resources.

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Section: Discussionmentioning

confidence: 99%

Exploring Microbial Resource of Different Rhizocompartments of Dominant Plants Along the Salinity Gradient Around the Hypersaline Lake Ejinur

et al. 2021

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“…Previous study supported that the moderate reduction of canker size by the combine application of Copper oxychloride + Bacillus sp. (Disease protection score, 3.03 cm) [ 21 ]. The treatment with contact fungicide Copper oxychloride suggested against the late blight ( Phytophthora infestans ) and early blight diseases ( Alternaria solani ) in potato plant [ 22 ].…”

Section: Discussionmentioning

confidence: 99%

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

Jeyaraman

Robert

2018

BMC Plant Biol

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BackgroundBranch canker caused by Macrophoma theicola is a major stem disease of tea plants (Camellia spp.). In tea plantations, this disease causes crop loss and it is one of the major limiting factor for yield stagnation. In very few instances it causes considerable damage in new clearings (about 3 or 4 years old) and large number of bushes have been killed. As there is no control measures for branch canker disease in south Indian tea plantation, this field study was conducted in naturally infected pruned tea field at UPASI Tea Research Institute (Good Agricultural Practice), Valparai, Tamil Nadu, India.MethodsThe chemical fungicides, biological agents and bio products were evaluated under naturally infected field of seedling plants for two consecutive disease seasons (2014–2015) and there was 11 treatments with three applications. All the treatments were carried out in the time of February–March and October–November (2014–2015). The two set of application was conducted per year. Each set contains eight rounds during the month of February–March as well as October–November (2014–2015). The chemical fungicides, biological agents and commercial bio products were measured as per UPASI- TRF, recommendation viz., COC (50 g/ha and 0.2 g/plot), Companion (20 g/ha and 0.08 g/plot), biological agent of Bacillus amyloliquefaciens, Tichoderma harzianum, Gliocladium virens and Beauveria bassiana (5 kg/ha and 20.8 g/plot) and bio product of Tari (1 L/ha and 4.2 ml/plot) and Tricure (1 L/ha and 4.2 ml/plot).ResultsThe present investigation revealed the integrated application of Companion/Bacillus amyloliquefaciens showed superior control of branch canker disease followed by the treatment with Companion alone under field condition. Copper oxychloride/Bacillus amyloliquefaciens was moderately effective followed by Copper oxychloride. The significantly reduced canker size was recorded with treatment of Bacillus amyloliquefaciens followed by commercial organic fungicides of Tari (Organic Tea Special) and Tricure (0.03% Azadirachtin). The least canker size was observed with Gliocladium virens followed by Beauveria bassiana. Branch canker disease incidence was increased in untreated control plants when compared to treated plants.ConclusionAmong these 11 treatments, the integrated treatment of companion at rate of 0.08 g and Bacillus amyloliquefaciens (20.8 g) showed the most significantly decreased canker size (DPL, 5.76) followed by another treatment with companion (0.08 g) (DPL, 4.11). The moderate reduction of canker size was observed by the treatment with Copper oxychloride (0.2 g)/Bacillus amyloliquefaciens (20.8 g) (DPL, 3.05) followed by the treatment of copper oxychloride alone (DPL, 1.74). Therefore, the integrated application of Companion/Bacillus amyloliquefaciens proved significantly effective in the management of branch canker disease under the field conditions.

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“…To explore changes in the main functional microbes, we analyzed the changes in pathogenic microbes and biocontrol agents in the Top 50 dominant genera compared with C. sinensis, as reported in the literature [15][16][17][18][19][20].…”

Section: Variation In Main Pathogenic and Biocontrol Agents In Camell...mentioning

confidence: 99%

“…In addition, fungi are one of the main sources of pathogens. Colletotrichum [15][16][17], Pestalotiopsis [16,17], Exobasidium [18], Botryodiplodia [16], Macrophoma [19], Fusarium [20], Corticium [20], Ustulina [20], and Sphaerotheca [20] are major pathogenic fungi for C. sinensis. Plant growth is a combination of these effects and involves a dynamic equilibrium for both beneficial and harmful microbes.…”

Section: Introductionmentioning

confidence: 99%

Diversity and Recruitment Strategies of Rhizosphere Microbial Communities by Camellia fascicularis, a Plant Species with Extremely Small Populations in China: Plant Recruits Special Microorganisms to Get Benefit out of Them

Mu,

Chen,

Hua

et al. 2023

Diversity

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Camellia fascicularis belongs to the family Theaceae and is a plant species with extremely small populations. It is also a second-class national protected plant in China. In recent years, the anti-inflammation, antioxidation, and antitumor effects of C. fascicularis polyphenols and flavonoids have been reported. However, changes in the soil chemistry and microbes after artificial cultivation of C. fascicularis have not been well studied. Therefore, three healthy plants from each different artificial planting year’s plot (Age_3, Age_5, and Age_7) were selected, and the chemical properties of the rhizosphere soil and root endophytic microbial communities for different cultivation years of C. fascicularis were studied in Hekou County, China. The accumulation of pathogenic and beneficial microbes in the rhizosphere of C. fascicularis was also discussed. The results show that (1) the alpha diversity in rhizosphere soil was significantly higher than that in roots, and roots recruited more Actinobacteria, which might produce beneficial secondary metabolites for the plant; (2) the total nitrogen in the rhizosphere soil of C. fascicularis cultivated for 7 years was significantly higher than that in the soil cultivated for 3 years; (3) there was no significant difference in the alpha and beta diversity in the rhizosphere soil and root endophytes of C. fascicularis in different cultivation years; (4) there was no difference in the abundance of plant-growth-promoting rhizobacteria (PGPR) in either the rhizosphere soil or roots, but the number of PGPR in roots was higher than that in rhizosphere soil; and (5) the changes in pathogenic fungi and biocontrol fungi in rhizosphere soil were greater than those of endophytic fungi in roots. The results show that there are no significant differences in microbial communities among 3, 5, and 7 years, but the influence of the outside environment on the soil and fungi was greater than that of the roots and bacteria. These results can help us to understand the soil chemical and microbial community changes during the artificial cultivation of C. fascicularis and play an important role in its artificial conservation and breeding, as it is a plant species with extremely small populations.

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Integrated management of branch canker disease (Macrophoma sp.) in tea under field level

Cited by 7 publications

References 4 publications

Exploring Microbial Resource of Different Rhizocompartments of Dominant Plants Along the Salinity Gradient Around the Hypersaline Lake Ejinur

Exploring Microbial Resource of Different Rhizocompartments of Dominant Plants Along the Salinity Gradient Around the Hypersaline Lake Ejinur

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

Diversity and Recruitment Strategies of Rhizosphere Microbial Communities by Camellia fascicularis, a Plant Species with Extremely Small Populations in China: Plant Recruits Special Microorganisms to Get Benefit out of Them

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