Relationship of Bacterial Leaf Blight Severity to Grain Yield of Rice

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.

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Evaluation of Yield, Reaction to Diseases, and Grain Physical Attributes of Some Introduced Rice Hybrids in Ghana

International Journal of Agronomy ◽

10.1155/2019/3926765 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Samuel Oppong Abebrese ◽

Alex Yeboah ◽

Wilson Dogbe ◽

Paul Kofi Ayirebi Dartey ◽

Richard Akromah ◽

...

Keyword(s):

Grain Yield ◽

Yield Components ◽

Hybrid Rice ◽

Block Design ◽

Leaf Blight ◽

Rice Production ◽

Bacterial Leaf Blight ◽

Yield Potential ◽

Randomized Complete Block Design ◽

Physical Attributes

Hybrid rice technology is one of the promising, sustainable, and proven technologies for increasing rice production and productivity with a yield advantage of 15–30% over modern inbred varieties. The potential of hybrid rice has so far not been exploited in Ghana. This study was undertaken to evaluate the yield potential, reaction to diseases, and physical grain attributes of some introduced hybrids. The trials were laid out in a randomized complete block design (RCBD) with three replicates across three locations. Data were taken on grain yield, yield components, reaction to diseases, and grain physical characteristics. Four promising hybrids (SWARNA 2, ARGH 1501, ARGH 1502, and ARGH 1503) with a mean yield advantage of 15–20.8% over the best inbred check “AgraRice” were identified. With few exceptions, the hybrids were broadly adapted and had adequate resistance to blast and bacterial leaf blight. Most of the test hybrids had long slender grains which make them acceptable to the Ghanaian market but lacked aroma.

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Growth promotion of transplanted rice plant by bioagents effective against bacterial leaf blight disease of rice under glasshouse conditions

Journal of Applied and Natural Science ◽

10.31018/jans.v6i1.407 ◽

2014 ◽

Vol 6 (1) ◽

pp. 234-238

Author(s):

Gokil Prasad Gangwar ◽

A. P. Sinha

Keyword(s):

Grain Yield ◽

Growth Promotion ◽

Foliar Spray ◽

Leaf Blight ◽

Bacterial Leaf Blight ◽

Total Phenolic ◽

Root Weight ◽

Transplanted Rice ◽

Untreated Check ◽

Blight Disease

The experiment was conducted to evaluate growth promotion of transplanted rice by fungal and bacterial bioagents effective against bacterial leaf blight of rice, under glasshouse conditions. Bioagent formulations (PBA -1, PBA -2, FLP 88, Pf 83, Isolate 40 and T. harzianum) were applied as seed treatment, seedling root dip and foliar spray and compared with chemical treatment and untreated check. All bioagent formulations were significantly effective in increasing number of tillers per hill, root length, total phenolic content in rice leaves, fresh and dry root weight, fresh and dry shoot weight, flag leaf area, grain yield and 1000 grain weight over check. Present study revealed that potential fungal and bacterial bioagents effective against bacterial leaf blight disease of rice, exhibited plant growth promoting activities and resulted 22.38 to 32.08 % increase in grain yield over untreated check, even if there is no disease.

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Genetic variability to improve yield and resistance to bacterial leaf blight in rice

Bangladesh Journal of Botany ◽

10.3329/bjb.v44i4.38573 ◽

2018 ◽

Vol 44 (4) ◽

pp. 581-589

Author(s):

AK Singh ◽

RK Singh ◽

Sunil Kumar ◽

M Arya ◽

PK Singh

Keyword(s):

Genetic Variability ◽

Grain Yield ◽

Plant Height ◽

Leaf Blight ◽

Test Weight ◽

Bacterial Leaf Blight ◽

Flowering Plant ◽

Panicle Length ◽

Weight Number ◽

Panicle Weight

One hundred F2 and F3 single plant progenies along with their parents and the infector rows were evaluated for 13 quantitative traits to assess the genetic variability, heritability, associations and estimation of number of genes for bacterial leaf blight resistance and yield related traits. In both F2 and F3, a wide range of variability was present for all the traits, indicating considerable scope for selection. High heritability accompanied with high genetic advance was observed for plant height, panicle length, panicle weight, number of effective tillers per plant and grain yield per plant. Positive and significant correlation were observed between grain yield per plant with days to 50% flowering, plant height, panicle length, panicle weight, number of effective tillers per plant, test weight and flag leaf length in either one of the generation or in combination of both F2 and F3. Path-coefficients analysis showed that plant height, panicle length and test weight had high direct positive effect in both the F2 and F3. The estimated number of gene(s) in the segregating generations for bacterial leaf blight was 2.14 in the F2 and 0.92 in the F3 revealed that two genes were involved in the inheritance of resistance to bacterial leaf blight in F2, while only one gene in F3 due to dominance effect.

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Relationship of Postinoculation Humidity to Bacterial Leaf Blight Development on Soybean

Phytopathology ◽

10.1094/phyto-61-879 ◽

1971 ◽

Vol 61 (7) ◽

pp. 879 ◽

Cited By ~ 4

Author(s):

B. W. Kennedy

Keyword(s):

Leaf Blight ◽

Bacterial Leaf Blight ◽

Relationship Of

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Effect of bioagent formulations on progress of bacterial leaf blight disease of rice under field conditions

Journal of Applied and Natural Science ◽

10.31018/jans.v5i2.338 ◽

2013 ◽

Vol 5 (2) ◽

pp. 388-393

Author(s):

Gokil Prasad Gangwar

Keyword(s):

Grain Yield ◽

Pseudomonas Fluorescens ◽

Trichoderma Harzianum ◽

Chemical Treatment ◽

Leaf Blight ◽

Field Conditions ◽

Bacterial Leaf Blight ◽

Progress Curve ◽

Untreated Check ◽

Blight Disease

In the present study, effectiveness of different fungal (Trichoderma harzianum) and bacterial (Pseudomonas fluorescens) bioagent formulations in reducing progress of the bacterial leaf blight disease of rice under field conditions was studied and compared with chemical treatment and untreated check. The results exhibited that after 23 to 30 days after first application, bioagent formulations were more effective then chemical treatment in reducing progress of disease. Bioagent formulations exhibited long lasting effect in reducing progress of disease during Kharif, 2006 and 2007. Application of bioagent formulations resulted in significant reduction (60.5 – 142.8%) in area under disease progress curve (AUDPC) as compared to check during Kharif, 2006 and 2007. Significant increase in grain yield (14.3 - 21.5 %) was observed with the application of bioagent formulations as compared to check during Kharif, 2006 and 2007.

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