Efficiency of axenically grown Rhizoctonia solani inoculum types in evaluating sheath blight development on rice genotypes

2021 ◽  
Author(s):  
Jagjeet S. Lore ◽  
Jyoti Jain ◽  
Mandeep S. Hunjan ◽  
Ishwinder Kamboj ◽  
Najam W. Zaidi ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Rice Genotypes

Effects of straw incorporation on Rhizoctonia solani inoculum in paddy soil and rice sheath blight severity

2013 ◽  
Vol 152 (5) ◽  
pp. 741-748 ◽  
Author(s):  
H. ZHU ◽  
Z. X. WANG ◽  
X. M. LUO ◽  
J. X. SONG ◽  
B. HUANG
Keyword(s):  
Rhizoctonia Solani ◽  
Disease Severity ◽  
Rice Straw ◽  
Paddy Soil ◽  
Sheath Blight ◽  
Soil Productivity ◽  
Rice Sheath Blight ◽  
Important Method ◽  
Pathogen Dynamics ◽  
Straw Incorporation

SUMMARYIncorporation of rice straw into soil has traditionally been an important method of recycling nutrients and improving soil productivity. Currently, although the effects of straw incorporation on disease severity have been documented, the dynamics of the pathogen in soil after straw incorporation are poorly understood. In the present study, rice straw with various proportions of diseased straw was incorporated at three separate locations (SuPu town, SuSong County and FengYang County) in Anhui province, China. The pathogen dynamics in paddy soil and disease severity of sheath blight during two continuous years from April 2010 to April 2012 were investigated. For all three locations, the amount of pathogen inoculum that persisted in the soil increased with increases in the proportion of diseased straw incorporated. Incorporation of 0·3 and 0·5 diseased straw into soil increased the amount of pathogen inoculum in the soil significantly, whereas incorporation of 0·1 diseased straw into soil had no significant effect on the pathogen inoculum compared with the control (no straw incorporated) or disease severity. Incorporation of healthy rice straw (no disease) resulted in a significant decrease in disease severity, whereas proportions of 0·3 and 0·5 diseased straw resulted in a significant increase of disease severity compared with the control. These results suggested that incorporation of diseased straw enhanced pathogen numbers in soil during the whole decomposition period and increased disease severity. To avoid soil-borne disease accumulation, severely diseased straw should be removed from the field or pre-treated before incorporation.

Functional analysis of polygalacturonase gene RsPG2 from Rhizoctonia solani, the pathogen of rice sheath blight

2017 ◽  
Vol 149 (2) ◽  
pp. 491-502 ◽  
Author(s):  
Xijun Chen ◽  
Li Lili ◽  
Yun Zhang ◽  
Jiahao Zhang ◽  
Shouqiang Ouyang ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Polygalacturonase Gene

scholarly journals In Vitro Efficacy of Five Biofungicides against Rhizoctonia solani Kuhn in Rice

2020 ◽  
Author(s):  
Irish Mae Bauzon-Cantila ◽  
Jaime C. Silvestre ◽  
Raquel B. Evangelista ◽  
Edralyn Catubay
Keyword(s):  
Rhizoctonia Solani ◽  
Aloe Vera ◽  
Fungal Disease ◽  
Sheath Blight ◽  
Low Risk ◽  
High Yield ◽  
Melaleuca Alternifolia ◽  
Causal Pathogen ◽  
Chemical Fungicides

ABSTRACTRhizoctonia solani Kuhn, the causal pathogen of sheath blight is second most damaging fungal disease in rice. While using chemical fungicides present high detriment to environment, the study investigate the efficacy of treatments composing five biofungicides in three different rates along with a biological agent, chemical check and untreated against the pathogen in in vitro level. In vitro efficacy showed that Melaleuca alternifolia + terpenes at 3.00 ml/L of H20 (T6), Aloe vera powder (Manopol) + Melaleuca oil at 3.00 ml/L of H20 (T15) and at 2.00 ml/L of H20 (T14) and Melaleuca alternifolia + terpenes at 2.00 ml/L of H20 (T5) as very effective (0-10 mm diameter zone of growth) treatments comparable to the chemical check (T17). Therefore, attaining high yield rice while having low risk to environment can always be done.

scholarly journals Uji Efektivitas Rizobakteria Dalam Menghambat Perkembangan Penyakit Hawar Pelepah Daun (Rhizoctonia solani Kuhn.) Pada Padi Secara In Vitro

2020 ◽  
Vol 16 (1) ◽  
pp. 44
Author(s):  
Hanisa Desy Ariani ◽  
Noor Aidawati ◽  
Dewi Arika Adriani
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Rhizoctonia Solani ◽  
Plant Protection ◽  
Block Design ◽  
Sheath Blight ◽  
In Vitro Test ◽  
Sheath Blight Disease ◽  
Randomized Block Design ◽  
Blight Disease

One of the causes of the declining productivity of rice is sheath blight disease caused by the mold Rhizoctonia solani Kuhn. Control of sheath blight disease that is often done by the farmers is by using chemical pesticides (fungicides), which caused environmental problems. One way to reduce the use of pesticides is to biological control by using antagonist bacteria. This study aimed at in vitro test of rhizobacteria in preventing the development of sheath blight disease in rice plants. This research was conducted in the Phytopathology laboratory of Plant Protection Department of Faculty Agriculture, University of Lambung Mangkurat Banjarbaru from March to May 2018. The experiment used a randomized block design with three groups consisting of eight types of rhizobacteria isolates: (r1) Pseudomonas aeruginosa (Barito Kuala), (r2) Bacillus megaterium (Hulu Sungai Tengah), (r3) Azotobacter sp. (Barito Kuala), (r4) Pseudomonas sp. (Hulu Sungai Selatan), (r5) Flavobacterium sp. (Tanah Laut), (r6) Bacillus bodius (Barito Kuala), (r7) Pseudomonas aeruginosa (Hulu Sungai Selatan), (r8) Necercia sp. (Tanah Laut). The results showed that all rhizobacteria have the ability to inhibit the development of R. solani with different percentages of inhibitions. Pseudomonas aeruginosa (Barito Kuala) was the most effective rhizobacteria in inhibiting the development of R. solani.

scholarly journals Identification of resistant sources of barnyard millet varieties against sheath blight caused by Rhizoctonia solani Kuhn

2020 ◽  
Vol 8 (5) ◽  
pp. 974-976
Author(s):  
TSSK Patro ◽  
KE Georgia ◽  
S Raj Kumar ◽  
N Anuradha ◽  
Y Sandhya Rani ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Barnyard Millet ◽  
Resistant Sources

scholarly journals BIOLOGICAL CONTROL OF BANDED LEAF AND SHEATH BLIGHT DISEASE (Rhizoctonia solani KUHN) IN CORN WITH FORMULATED Bacillus subtilis BR23

2016 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Amran Muis ◽  
Arcadio J. Quimio
Keyword(s):  
Bacillus Subtilis ◽  
Seed Germination ◽  
Rhizoctonia Solani ◽  
Seed Treatment ◽  
The Philippines ◽  
Sheath Blight ◽  
Resistant Variety ◽  
Sodium Hypochlorite Solution ◽  
Sheath Blight Disease ◽  
Blight Disease

Rhizoctonia solani Kuhn. causing banded leaf and sheath blight diseases is one of the important fungi of corn world wide. The fungus is commonly controlled by using fungicide because no resistant variety available. The objective of the study was to develop a seed treatment formulation of the selected Bacillus subtilis to control R. solani in corn. The study was conducted in the Department of Plant Pathology, College of Agriculture, University of the Philippines Los Bañòs, College, Laguna from May 2004 to August 2005, using sweet corn var. IPB Supersweet as test plant. Corn seeds were surface sterilized for 10 minutes in 1% sodium hypochlorite solution and 5% ethanol, washed thrice with sterile distilled water and air-dried. The seeds were coated with formulated B. subtilis BR23 and used for several experiments, such as evaluation for their germination and growth in the laboratory, effectively on R. solani in the baked and nonbaked field soil under greenhouse condition, and in the microplots artificially infested with R. solani. The treatment was compared with other standard seed treatment of synthetic fungicides such as captan (10 g per kg seeds) and metalaxyl (10 g per kg seeds). The experiments were designed in a completely random design with three replications. Parameters observed were seed germination, plant height, disease scores, and plant yield. Laboratory formulated B. subtilis BR23 used as seed treatment had no detrimental effects on seed germination and seedling vigor. In microplots artificially infested with a selected highly virulent R. solani, seed treatment with the same formulation increased grain yield by 27% compared to that of the control captan seed treatment with 14.4%. The studies showed the potential of B. subtilis BR23 for commercialization as a seed treatment for the control of banded leaf and sheath blight disease (R. solani) in corn.

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