scholarly journals Field evaluation of Rot-fix for management of root rot disease of mulberry (Morus sp.)

2021 ◽  
Vol 16 (2) ◽  
pp. 135-139
Author(s):  
P.M. Pratheesh Kumar
Keyword(s):  
Root Rot ◽  
Large Scale ◽  
Environmental Concern ◽  
Field Evaluation ◽  
Field Trials ◽  
Leaf Production ◽  
Southern States ◽  
Root Rot Disease ◽  
Rot Disease

Mulberry is cultivated throughout India as a host plant of silkworm (Bombyx mori L.) reared for commercial production of silk. The quality of silk produced depends largely on the quality of leaf fed to silkworm. Various mulberry diseases limit quality and quantity of silk production affecting the economic return to the farmers. Among these, root rot caused by a group of fungi is a severe threat for mulberry leaf production, especially in southern states of India due to large scale mortality and enormous crop loss. Though many fungi are isolated from the infected root, Fusarium solani is the one frequently found associated with the disease. Chemical control with fungicides is not advisable due the environmental concern and toxicity to the soil and silkworm. Thus, recently a broad spectrum environment friendly formulation viz., Rotfix has been developed by the Central Sericultural Research & Training Institute, Mysore and recommended after limited on-farm and field trials. However its efficiency has not been evaluated at the farmers’ level in large scale. The present study has been conducted to evaluate the effect of Rot-fix in large scale in four southern states of India. The Rot-fix has been applied to the infected plants and their recovery has been studied. There was a high recovery (86.76-91.96%) of the infected plants after application of Rot-fix. Though the leaf yield was significantly (P<0.01) lower (2.48%) in the recovered plants in first crop, by the second crop the plants were recovered completely and started giving yield the statistically on par with untreated healthy plants. The study therefore recommends the use of Rot-fix in large scale for control of root rot disease of mulberry.

scholarly journals Comparison of the Performance of Grafted and Ungrafted Coffee Trees

1969 ◽  
Vol 51 (4) ◽  
pp. 293-303
Author(s):  
T. Singh Dhaliwal ◽  
A. Morales Muñoz ◽  
J. Jordán Molero ◽  
P. Meléndez González
Keyword(s):  
Puerto Rican ◽  
Root Rot ◽  
Percent Level ◽  
Field Trials ◽  
Large Field ◽  
Root Rot Disease ◽  
Coffee Yield ◽  
Rot Disease ◽  
Level Of Significance ◽  
Growth Characters

The performance of grafted and ungrafted coffee trees was compared in three large field trials for up to 6 years. The data and general observations as to rootstock and scion incompatibility, incidence of the root rot disease, growth characters of trees, coffee yield, and bean characters, indicated that, of the six rootstocks tested, Excelsa seems to be the best for Puerto Rican and Bourbon varieties. In a replicated field trial during which four crops were harvested, Bourbon trees grafted on Excelsa produced annually 31.98 percent more market coffee than ungrafted trees of the Bourbon variety. This difference did not attain the 5-percent level of significance.

scholarly journals FIELD EVALUATION OF FACTORS CONTRIBUTING TO STRAWBERRY BLACK ROOT ROT DISEASE

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 245e-245
Author(s):  
Katherine B. Wing ◽  
Marvin P. Pritts
Keyword(s):  
Soil Texture ◽  
Root Rot ◽  
Soil Compaction ◽  
Cultural Practices ◽  
Field Measurements ◽  
Field Evaluation ◽  
Black Root Rot ◽  
Root Rot Disease ◽  
Rot Disease ◽  
Root Health

Black root rot is a devastating, poorly understood disease complex affecting strawberries in temperate regions. The objective of the study was to conduct a comprehensive field survey of environmental, cultural, and pathological factors contributing to black root rot disease of strawberries as it occurs in New York. In Spring 1992, growers were visited to collect information on cultural practices, field measurements, and plant and soil samples from healthy and infected fields. Plants were scored for root health and measurements were made for nematode densities, soil compaction, soil texture, soil nutrients, and plant dry weights. Variables significantly correlated with poor root health were soil compaction, fine soil texture, absence of raised beds, high rates of terbacil (Sinbar) use, advanced age of planting, and many cumulative years of strawberry culture.

scholarly journals Biological control of Phaseolus vulgaris and Pisum sativum root rot disease using Trichoderma species

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Hammad Abdelwanees Ketta ◽  
Omar Abd El-Raouf Hewedy
Keyword(s):  
Phaseolus Vulgaris ◽  
Pisum Sativum ◽  
Common Bean ◽  
Root Rot ◽  
Fungal Pathogens ◽  
Plant Diseases ◽  
Root Rot Disease ◽  
Pea Root ◽  
Rot Disease ◽  
Pea Root Rot

Abstract Background Root rot pathogens reported to cause considerable losses in both the quality and productivity of common bean (Phaseolus vulgaris L.) and pea (Pisum sativum L.). It is an aggressive crop disease with detriment economic influence caused by Fusarium solani and Rhizoctonia solani among other soil-borne fungal pathogens. Destructive plant diseases such as root rot have been managed in the last decades using synthetic pesticides. Main body Seeking of economical and eco-friendly alternatives to combat aggressive soil-borne fungal pathogens that cause significant yield losses is urgently needed. Trichoderma emerged as promising antagonist that inhibits pathogens including those inducing root rot disease. Detailed studies for managing common bean and pea root rot disease using different Trichoderma species (T. harzianum, T. hamatum, T. viride, T. koningii, T. asperellum, T. atroviridae, T. lignorum, T. virens, T. longibrachiatum, T. cerinum, and T. album) were reported both in vitro and in vivo with promotion of plant growth and induction of systemic defense. The wide scale application of selected metabolites produced by Trichoderma spp. to induce host resistance and/or to promote crop yield, may represent a powerful tool for the implementation of integrated pest management strategies. Conclusions Biological management of common bean and pea root rot-inducing pathogens using various species of the Trichoderma fungus might have taken place during the recent years. Trichoderma species and their secondary metabolites are useful in the development of protection against root rot to bestow high-yielding common bean and pea crops.

scholarly journals Bacillus megaterium-Mediated Synthesis of Selenium Nanoparticles and Their Antifungal Activity against Rhizoctonia solani in Faba Bean Plants

2021 ◽  
Vol 7 (3) ◽  
pp. 195
Author(s):  
Amr H. Hashem ◽  
Amer M. Abdelaziz ◽  
Ahmed A. Askar ◽  
Hossam M. Fouda ◽  
Ahmed M. A. Khalil ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Vicia Faba ◽  
Root Rot ◽  
Antifungal Agents ◽  
Damping Off ◽  
Growth Promoters ◽  
Root Rot Disease ◽  
Rot Disease

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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