Antifungal activity of biosynthesised copper nanoparticles evaluated against red root-rot disease in tea plants

Rhizoctonia root-rot disease causes severe economic losses in a wide range of crops, including Vicia faba worldwide. Currently, biosynthesized nanoparticles have become super-growth promoters as well as antifungal agents. In this study, biosynthesized selenium nanoparticles (Se-NPs) have been examined as growth promoters as well as antifungal agents against Rhizoctonia solani RCMB 031001 in vitro and in vivo. Se-NPs were synthesized biologically by Bacillus megaterium ATCC 55000 and characterized by using UV-Vis spectroscopy, XRD, dynamic light scattering (DLS), and transmission electron microscopy (TEM) imaging. TEM and DLS images showed that Se-NPs are mono-dispersed spheres with a mean diameter of 41.2 nm. Se-NPs improved healthy Vicia faba cv. Giza 716 seed germination, morphological, metabolic indicators, and yield. Furthermore, Se-NPs exhibited influential antifungal activity against R. solani in vitro as well as in vivo. Results revealed that minimum inhibition and minimum fungicidal concentrations of Se-NPs were 0.0625 and 1 mM, respectively. Moreover, Se-NPs were able to decrease the pre-and post-emergence of R. solani damping-off and minimize the severity of root rot disease. The most effective treatment method is found when soaking and spraying were used with each other followed by spraying and then soaking individually. Likewise, Se-NPs improve morphological and metabolic indicators and yield significantly compared with infected control. In conclusion, biosynthesized Se-NPs by B. megaterium ATCC 55000 are a promising and effective agent against R. solani damping-off and root rot diseases in Vicia faba as well as plant growth inducer.

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Evaluation of Streptomyces spp. for effective management of Poria hypolateritia causing red root-rot disease in tea plants

Biological Control ◽

10.1016/j.biocontrol.2015.05.003 ◽

2015 ◽

Vol 89 ◽

pp. 75-83 ◽

Cited By ~ 9

Author(s):

Viswanathan Elango ◽

Kolandasamy Manjukarunambika ◽

Ponnusamy Ponmurugan ◽

Subbagoundar Marimuthu

Keyword(s):

Root Rot ◽

Effective Management ◽

Root Rot Disease ◽

Streptomyces Spp ◽

Rot Disease ◽

Tea Plants

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Evaluation ofOchrobactrum anthropiTRS-2 and its talc based formulation for enhancement of growth of tea plants and management of brown root rot disease

Journal of Applied Microbiology ◽

10.1111/j.1365-2672.2009.04242.x ◽

2009 ◽

Vol 107 (2) ◽

pp. 625-634 ◽

Cited By ~ 46

Author(s):

U. Chakraborty ◽

B.N. Chakraborty ◽

M. Basnet ◽

A.P. Chakraborty

Keyword(s):

Root Rot ◽

Root Rot Disease ◽

Rot Disease ◽

Tea Plants ◽

Brown Root Rot

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Antifungal activity of plant extracts against Embellisia astragali, the fungal causal agent of yellow dwarf and root-rot disease of standing milkvetch

Crop and Pasture Science ◽

10.1071/cp15012 ◽

2015 ◽

Vol 66 (7) ◽

pp. 735 ◽

Cited By ~ 1

Author(s):

Cuiyun Zeng ◽

Xiaoyu Zhu ◽

Zhen Cui ◽

Yanzhong Li

Keyword(s):

Antifungal Activity ◽

Root Rot ◽

Juglans Regia ◽

Yellow Dwarf ◽

Root Rot Disease ◽

Ethanolic Extracts ◽

Rot Disease ◽

Causative Fungus ◽

Saposhnikovia Divaricata

In an attempt to find biological fungicides, we screened 18 medicinal plants used in Chinese traditional medicine for their activity against Embellisia astragali, the causative fungus of yellow dwarf and root-rot disease in standing milkvetch (Astragalus adsurgens Pall.). The antifungal eﬃcacy of ethanolic extracts of these plants was tested in vitro. Our results show that among the 18 plants tested, the ethanolic extracts of Saposhnikovia divaricata, Allium sativum and Juglans regia totally inhibited mycelial growth of E. astragali. These three extracts also significantly inhibited spore germination of E. astragali, with inhibition rates ranging from 86% to 88%. In addition, the same extract from the same plant part indicated the strongest antifungal activity against E. astragali, with a minimal inhibitory concentration value of 50 mg mL–1. These results demonstrate that plant-derived products have a high potential to control yellow dwarf and root-rot disease in standing milkvetch.

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