scholarly journals Effect of bioagent application time against bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae (Uyeda and Ishiyama) Dowson

2014 ◽  
Vol 6 (1) ◽  
pp. 95-100
Author(s):  
Gokil Prasad Gangwar ◽  
A. P. Sinha
Keyword(s):  
Disease Severity ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Application Time ◽  
Maximum Increase ◽  
Time Of Application ◽  
Maximum Reduction ◽  
Blight Disease ◽  
Time Sequences

Present investigation was carried out to test the effect of time of application on efficacy of Trichoderma harzianum and Pseudomonas fluorescens formulations against bacterial leaf blight of rice, under field condition. Foliar sprays with bioagent(s) in three time sequences i.e. 7 days before, simultaneously and 7 days after inoculation of Xanthomonas oryzae pv. oryzae inoculation significantly reduced disease severity over check during Kharif 2006 and 2007. Maximum reduction in bacterial leaf blight disease was obtained with the application of T. harzianum on 7 days before inoculation of pathogen during Kharif 2006 and 2007 and maximum increase in grain yield was obtained with the application of PBA-2 seven days before inoculation of pathogen. It was revealed that prophylactic spray of bioagents one week prior to pathogen inoculation was significantly (106 cfu/g) effective in reducing disease severity of bacterial leaf blight of rice as compared to chemical treatment.

scholarly journals Field efficacy of formulation of fungal bioagents against bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae (Uyeda and Ishiyama) Dowson

2013 ◽  
Vol 5 (2) ◽  
pp. 423-426 ◽  
Author(s):  
Gokil Prasad Gangwar
Keyword(s):  
Grain Yield ◽  
Disease Severity ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Comparative Efficacy ◽  
Trichoderma Spp ◽  
Maximum Increase ◽  
Kharif Season ◽  
Field Efficacy ◽  
Different Sources

In the present study, Trichoderma harzianum, T. hamatum, T. virens and three isolates of Trichoderma spp. were evaluated for their comparative efficacy against bacterial leaf blight of rice, under field conditions. All the bioagent formulations were significantly effective in reducing disease severity over check during Kharif season 2006 and 2007. T. harzianum was found to be most effective and resulted 48.26 and 59.22 % reduction in disease severity during Kharif season 2006 and 2007, respectively. Maximum increase in grain yield (16.21%) was recorded with T. harzianum followed by isolate 40 (14.58%), during Kharif season 2006. Whereas during Kharif season 2007, maximum increase in grain yield (18.95%) was recorded with T. harzianum which is followed by T. virens (14.65%) and isolate 40 (12.57 %). Present study revealed that T. harzianum (isolated from rice phylloplane) was found to be most effective in reducing disease severity and increasing grain yield as compared to other isolates obtained from different sources.

scholarly journals KETAHANAN BEBERAPA GENOTIPE PADI TERHADAP PENYAKIT HAWAR DAUN BAKTERI (XANTHOMONAS ORYZAE PV. ORYZAE)

2016 ◽  
Vol 15 (2) ◽  
pp. 152 ◽  
Author(s):  
Wira Hadianto ◽  
Lukman Hakim ◽  
Bakhtiar .
Keyword(s):  
Block Design ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Bacterial Isolates ◽  
Randomized Complete Block Design ◽  
Resistance Reaction ◽  
Rice Genotypes ◽  
Blight Disease ◽  
Screen House

The resistance rice genotypes against bacterial leaf blight (Xanthomonas oryzae pv. oryzae). The research was conducted to analyze genotypes of rice that were resistant to bacterial leaf blight (BLB) disease. The experiment was conducted at the screen house of Faculty of Agriculture, Syiah Kuala University, Banda Aceh from February to October 2014. This experiment was arranged in randomized complete block design with 73 treatments and 3 replications. IR-BB27 and IR-64 were used as control of resistant and susceptible varieties to BLB, respectively. The result showed that the bacterial isolates tested were virulent. The longest incubation period found in Limboto, Inpari 10, Situ Patenggang, Sirendeh Semantuk Wayla, Tamboen, Sepasie, Bontok and Arias. Genotypes Inpari 1, Limboto, Tuwoti, Inpari 10, Lekat Rambot Linuet, Rom Mokot, Paki Gajah, Tamboen, Bo 100, Sipasie, Bo Minyek, Bontok, Sirendeh Semantuk Wayla and Sambei showed resistance reaction to bacterial leaf blight disease.

scholarly journals Field Performance of BAU-Biofungicaide for Management of Narrow Brown Leaf Spot and Bacterial Leaf Blight Disease of Rice CV. BRRI Dhan29

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Hyat Mahmud
Keyword(s):  
Disease Severity ◽  
Leaf Spot ◽  
Seed Quality ◽  
Field Performance ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Leaf Spot Disease ◽  
Brown Leaf Spot ◽  
Brown Leaf ◽  
Blight Disease

Potent (0.1%) and BAU-Biofungicide (2%) revealed the significant reduction both in disease severity and incidence of narrow brown leaf spot disease, and the lowest disease severity and incidence of bacterial leaf blight disease were 3.00% and 5.83%, respectively in BRRI dhan29 in 2012 year. BAU-Biofungicide (Trichoderma based preparation), extract of garlic (Allium sativum) and neem (Azadirachta indica), Bavistin DF (Carbandazim) and Potent 250 EC (Propiconazole) were evaluated in controlling narrow brown leaf spot and bacterial leaf blight disease (Xanthomonas oryzae pv. Oryzae) under field condition for producing seed quality and controlling seed borne pathogen of rice cv BRRI dhan29 during 2012 and 2013 years. Maximum normal seedling (87.67%) and 37.49% higher increase in vigour index on seed quality test of harvested seeds were observed with BAU-Biofungicide (3%) over control. BAU-Biofungicide (2 and 3%) and Potent 250 EC (0.1%) were found to be effective in controlling seed borne pathogens. BAU-Biofungicide has also been attributed as profound contribution on quality seed production of harvested seed of BAU-Biofungicide sprayed plot.

scholarly journals Effect of fungal and bacterial bioagent application on total phenolic content in rice leaves pre-inoculated with Xanthomonas oryzae pv. oryzae (Uyeda and Ishiyama) Dowson

2014 ◽  
Vol 6 (1) ◽  
pp. 254-257 ◽  
Author(s):  
Gokil Prasad Gangwar ◽  
A. P. Sinha
Keyword(s):  
Disease Severity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Total Phenolic ◽  
Trichoderma Spp ◽  
Rice Leaf ◽  
Rice Leaves

Present study was carried out to observe the effect of fungal and bacterial bioagents on total phenolic content in rice leaves pre-inoculated with Xanthomonas oryzae pv. oryzae and on disease severity of bacterial leaf blight of rice. Two commercial formulations of Trichoderma harzianum (PBA-1) and Pseudomonas fluorescens (PBA-2) and four formulations of fluorescent pseudomonads and Trichoderma spp. viz, P. fluorescens (Pf 83, rice leaf isolate), fluorescent pseudomonad (FLP 88, rice leaf isolate), T. harzianum (rice leaf isolate), Trichoderma spp. (isolate 40, isolated from rice field soil) were evaluated. Significantly higher mean value of total phenolic content of rice leaves was observed with the application of bioagent formulations as compared to check (pre-inoculated with X. oryzae pv. oryzae), chemical treatment and healthy plant. Maximum mean total phenolic content (342.22 μl/g) in rice leaves was observed with Pf 83, which was followed by PBA-2 (334.44 μl/g) and T. harzianum (330.00 μl/g). Decrease in disease severity of bacterial leaf blight was observed with the increase of total phenolic content in rice leaves which resulted in increased grain yield and 1000 grain weight.

scholarly journals Evaluation of Local Black Glutinous Rice Germplasm of Vietnam for Resistance to Bacterial Leaf Blight Disease

2019 ◽  
Vol 1 (3) ◽  
pp. 240-248
Author(s):  
Tung Hoang ◽  
Ton Huu Phan ◽  
Hai Van Tong ◽  
Trung Nam Tran
Keyword(s):  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Resistant Genes ◽  
Glutinous Rice ◽  
Resistant Varieties ◽  
Environmentally Safe ◽  
Susceptible Control ◽  
Blight Disease ◽  
North Vietnam

Most rice growing areas frequently encounter the bacterial leaf blight, Xanthomonas oryzae pv oryzae (Xoo). To prevent the disease, development of resistant varieties is considered to be the most economical and environmentally safe solution. In this study, three PCR-based markers, Npb181, RM122, and P3, were used for the identification of the genes Xa4, xa5, and Xa7, respectively, from 56 local black glutinous rice accessions of Vietnam. Phenotypic screening of the accessions for resistance to 10 Xoo strains of North Vietnam, along with IRBB4, IRBB5, and IRBB7 as resistant controls and IR24 as a susceptible control were carried out in the 2016 Autumn season. 19 accessions containing the resistant genes were found, of these, 6 accessions carried Xa4 gene, 6 accessions carried xa5 gene, and 11 accessions carried Xa7 gene. Three accessions carried two resistance genes, viz. Nep do (Xa4 and Xa7), Pau cam (xa5 and Xa7), and Pe lon cam (Xa4 and xa5). Accessions with xa5 and Xa7 alone or with a combination of two genes (Xa4 and xa5, Xa4 and Xa7, or xa5 and Xa7) were resistantto 8-9 Xoo strains (8-9R/0M/1-2S). Accessions containing Xa4 showed resistance to 5-6 strains of Xoo (5-6R/0M/4-5S). Xoo strain No1 (HUA01043) showed the lowest virulence, infecting only 14 accessions (42R/4M/14S). Strains No3 (HUA 0020131-2), No4 (HUA202361), No5 (HUA20212), and No8 (HUA 020083) showed highest virulence, and they each infected more than 40 accessions with 19R/0M/41S, 20R/0M/40S, 16R/4M/40S, and 20R/0M/40S, respectively. These strains can even infect some accessions containing effective resistant genes (Xa4 or Xa7).

scholarly journals Leaf Blight Disease caused by Pseudomonas syringae pv. syringae in the Nurseries of Litchi (Litchi chinensis Sonn.) and its Management

2017 ◽  
Vol 15 (1) ◽  
pp. 10-18
Author(s):  
MAH Khan ◽  
I Hossain ◽  
MU Ahmad ◽  
MSM Chowdhury
Keyword(s):  
Disease Severity ◽  
Pseudomonas Syringae ◽  
Copper Sulphate ◽  
Disease Incidence ◽  
Foliar Spray ◽  
Antibiotic Sensitivity ◽  
Weather Conditions ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Blight Disease

Leaf blight of seven varieties of litchi caused by Pseudomonas syringae pv. syringae was surveyed in the nurseries of major litchi growing areas in Bangladesh viz. Rajshahi, Dinajpur, Rangpur, Mymensingh and Khagrachari. The mean level of incidence and severity were 8.58 and 7.88% in Rajshahi, 9.88 and 8.88% in Dinajpur, 8.44 and 7.76% in Rangpur, 6.50 and 6.18% in Mymensingh and 9.00 and 7.98% in Khagrachari. Incidence and severity of bacterial leaf blight disease of litchi varied significantly depending on weather conditions. Correlation studies revealed that bacterial leaf blight disease of litchi seedlings were positively correlated with temperature, rainfall and relative humidity, where temperature and rainfall was the major factor to the variations of both incidence and severity. Antibiotic sensitivity test revealed that among fifteen isolates, most of the isolates of P. syringae pv. syringae collected from litchi were sensitive to Gentamycin and Erythromycin. Under net house condition, six different treatments (i) Gentamycin @ 0.05%, (ii) Erythromycin @ 0.05%, (iii) Doxycycline @ 0.05%,(iv) Copper sulphate @ 0.05%, (v) BAU-Biofungicide @ 2% and (vi) Control were used for controlling bacterial leaf blight of litchi (Variety: China-3). BAU-Biofungicide was found to be superior in controlling bacterial leaf blight of litchi that reduced 33.64% disease incidence and 60.77 % disease severity in 2010-11 and 63.76% disease incidence and 61.40 % disease severity in 2011-12 over control when applied as foliar spray @ 2% followed by Copper sulphate (0.05%) and Erythromycin (0.05%).The Agriculturists 2017; 15(1) 10-18

scholarly journals Aplikasi Agen Hayati (Paenibacillus polymixa) terhadap Penekanan Penyakit Hawar Daun Bekteri Serta Hasil dan Pertumbuhan Padi Hitam (Oryza sativa)Var. Lokal

2018 ◽  
Vol 6 (2) ◽  
pp. 134
Author(s):  
Endang Kantikowati ◽  
Ridwan Haris ◽  
Saiful Anwar
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Leaf Blight ◽  
Biological Agent ◽  
Bacterial Leaf Blight ◽  
Time Of Application ◽  
Factor Ii ◽  
Rice Yields ◽  
Main Plot ◽  
Blight Disease

The Experiment  was aimed to assess influence of concentration and application of biological agent Paenibacillus polymixa to bacterial leaf blight disease and  black rice yields  (Oryza sativa L.) local varieties The research was conducted in P4S Al Mukhlis   Kiangroke Village, Bandung District, West Java. In December 2016 until April 2017. The experiment used a split-plot design with two factor : 3 application period (W) as the main plot and 4 concentration level (K) as the subplot, thus obtained 12 treatment combinations and each combination was repeated 3 times. Then obtained 36 plot of experiment. Factor I main plot (W) : W1 = morning application (10, 20, 30, 40, 50, 60, 70 days after planting), W2 = daytime (10, 20, 30, 40, 50, 60, 70 days after planting), W3 = afternoon application (10, 20, 30, 40, 50, 60, 70 days after planting) and factor II (K) : K1 = Control, K2 = 5 ml L-1, K3 = 10 ml L-1, K4 = 15 ml L-1. The result showed that the effect of concentration  and time of application of biological agent of Paenibacillus polymixa gave no significant effect on plant height, disease intensity, number of productive tillers, number of the dry grain harvest, number of unhulled grain per panicle, and weight of 1000 filled grains. There was an interaction between concentration and time of application of biological agent of Paenibacillus polymixa to bacterial leaf blight disease intensity at age of 95 DAP, treatment of K3 (10ml L-1) with W1 (morning application)   gave more resistance effect to bacterial leaf blight intensity. 

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