Control of Helminthosporium leaf blight of spring wheat using seed treatments and single foliar spray in Indo-Gangetic Plains of Nepal

2016 ◽  
Vol 88 ◽  
pp. 161-166 ◽  
Author(s):  
D. Sharma-Poudyal ◽  
R.C. Sharma ◽  
E. Duveiller
Keyword(s):  
Spring Wheat ◽  
Foliar Spray ◽  
Leaf Blight ◽  
Seed Treatments ◽  
Gangetic Plains ◽  
Helminthosporium Leaf Blight

Resistance to Helminthosporium leaf blight and agronomic performance of spring wheat genotypes of diverse origins

Euphytica ◽  
2004 ◽  
Vol 139 (1) ◽  
pp. 33-44 ◽  
Author(s):  
R. C. Sharma ◽  
E. Duveiller ◽  
S. Gyawali ◽  
S. M. Shrestha ◽  
N. K. Chaudhary ◽  
...  
Keyword(s):  
Spring Wheat ◽  
Leaf Blight ◽  
Agronomic Performance ◽  
Wheat Genotypes ◽  
Helminthosporium Leaf Blight

Selection Index for Improving Helminthosporium Leaf Blight Resistance, Maturity, and Kernel Weight in Spring Wheat

Crop Science ◽  
2003 ◽  
Vol 43 (6) ◽  
pp. 2031-2036 ◽  
Author(s):  
R. C. Sharma ◽  
E. Duveiller
Keyword(s):  
Spring Wheat ◽  
Selection Index ◽  
Kernel Weight ◽  
Leaf Blight ◽  
Blight Resistance ◽  
Helminthosporium Leaf Blight

scholarly journals Yield and Yield Components Response to Defoliation of Spring Wheat Genotypes with Different Level of Resistance to Helminthosporium Leaf Blight

2005 ◽  
Vol 26 ◽  
pp. 43-50 ◽  
Author(s):  
UR Rosyara ◽  
RC Sharma ◽  
SM Shrestha ◽  
E Duveiller
Keyword(s):  
Grain Yield ◽  
Spring Wheat ◽  
Flag Leaf ◽  
Spot Blotch ◽  
Leaf Blight ◽  
Tan Spot ◽  
Index Number ◽  
Leaf Removal ◽  
Wheat Genotypes ◽  
Helminthosporium Leaf Blight

Breeding for resistance to Helminthosporium leaf blight (HLB) caused by a complex of spot blotch (Cochliobolus sativus) and tan spot (Pyerenophora tritici-repentis Died) of wheat (Triticum aestivum L.) is difficult due to complex nature of resistance, and high influence of environment. This study was conducted to examine whether genotypes having variation in level of resistance and tolerance differ in compensation to loss of leaves. Five spring wheat genotypes with different levels of resistance and tolerance to HLB were grown under irrigated field conditions in randomized complete block design during 2001-2002 and 2002- 2003 wheat-growing season at Rampur, Chitwan, Nepal. Defoliation treatments consist of removal of flag (F), penultimate (F-1), and both F and F-1 leaves were done one day after anthesis. Results showed that defoliation had significant effects on grain yield, biomass yield, thousand-kernel weight (TKW) but not on harvest index, number of grains per spike, kernel per spikelet, and spikelets per spike. All genotypes included in this study showed some degree of compensation for loss of F, F-1, and both F and F-1 leaves, which was found to be variable between years. Removal of flag leaf was compensated by the resistant genotype NL750 for both grain yield and TKW but not for both F and F-1 leaves. Loss of both F and F-1 leaves was better compensated by BL 1473, a stably tolerant genotype in both years. For other genotypes sensitivity to defoliation was found as variable as tolerance to HLB. Key words: Spot blotch, tan spot, defoliation, compensation, flag leaf removal, penultimate leaf removal J. Inst. Agric. Anim. Sci. 26:43-50 (2005)

Combining ability analysis of resistance to Helminthosporium leaf blight in spring wheat

Euphytica ◽  
2004 ◽  
Vol 136 (3) ◽  
pp. 341-348 ◽  
Author(s):  
R.C. Sharma ◽  
S.N. Sah ◽  
E. Duveiller
Keyword(s):  
Spring Wheat ◽  
Combining Ability ◽  
Leaf Blight ◽  
Combining Ability Analysis ◽  
Helminthosporium Leaf Blight

scholarly journals Efficacy of Fungicidal Seed Treatments on Seed Borne Diseases of Green Gram

2020 ◽  
Vol 7 (3) ◽  
pp. 138-143
Author(s):  
A. J. Deshmukh ◽  
◽  
A. N. Sabalpara ◽  
R. P. Bambharolia ◽  
◽  
...  
Keyword(s):  
Leaf Spot ◽  
Seed Treatment ◽  
Leaf Blight ◽  
Green Gram ◽  
Seed Treatments ◽  
Thiophanate Methyl ◽  
Anthracnose Disease ◽  
Pooled Data ◽  
Alternaria Leaf Spot

The experiment was conducted to perceive the effect of fungicidal seed treatment on seed borne diseases of green gram on susceptible cv. GM-3 with nine different fungicides. Results revealed that dry seed treatment with either mix formulation of carbendazim + mancozeb or thiophanate methyl or carbendazim @ 2.5 g kg-1 seeds is very effective in field to control Macrophomina leaf blight, Alternaria leaf spot and Anthracnose diseases. Two years pooled data indicated that PDI of Macrophomina leaf bilght was significantly lower in dry seed treatment with carbendazim + mancozeb (0.99%, 12.90%) which was statistically at par with thiophanate methyl (1.54%, 13.80%) followed by carbendazim (0.99%, 14.06%) at 35 and 65 DAS, respectively. Two years pooled data of Alternaria leaf spot indicated that the PDI of was significantly lower in dry seed treatment with carbendazim + mancozeb (2.64%, 11.15%) which was statistically at par with thiophanate methyl (2.74%, 11.30%) followed by carbendazim (2.84%, 11.37%) at 35 and 65 DAS. Two years pooled data of Anthracnose disease indicated that the PDI of Anthracnose was significantly lower in dry seed treatment with carbendazim + mancozeb (0.81%, 6.71%).

Effect of seed treatment and foliar spray on leaf blight of fodder oat in Punjab

2019 ◽  
Vol 47 (5) ◽  
pp. 723-731 ◽  
Author(s):  
Ashlesha Atri ◽  
U. S. Tiwana
Keyword(s):  
Seed Treatment ◽  
Foliar Spray ◽  
Leaf Blight

scholarly journals Revisiting Sustainability of Fungicide Seed Treatments for Field Crops

Plant Disease ◽  
2020 ◽  
Vol 104 (3) ◽  
pp. 610-623 ◽  
Author(s):  
Jay Ram Lamichhane ◽  
Ming Pei You ◽  
Véronique Laudinot ◽  
Martin J. Barbetti ◽  
Jean-Noël Aubertot
Keyword(s):  
Seed Treatment ◽  
Foliar Spray ◽  
Economic Benefits ◽  
Soil Organisms ◽  
Seed Treatments ◽  
User Friendliness ◽  
Crop Species ◽  
Nontarget Effects ◽  
Development Of Resistance ◽  
Negative Impacts

The use of fungicide seed treatment (FST) is a very common practice worldwide. The purported effectiveness of many fungicides in providing broad-spectrum and systemic control of important diseases and the perception that FST reduces overall pesticide use, hence lowering environmental impacts, have greatly promoted the use of FST in the last five decades. Since there have been rapid advancements in the types, formulations, and application methods for seed treatments, there is a need to re-evaluate the benefits versus the risks of FST as a practice. While the use of seeds treated with neonicotinoid insecticides has come under scrutiny due to concern over potential nontarget effects, there are knowledge gaps on potential negative impacts of FST on operators’ (those who apply, handle, and use treated seeds) health and nontarget soil organisms (both macro- and microorganisms). Here we review existing knowledge on key fungicides used for seed treatments, benefits and risks related to FST, and propose recommendations to increase benefits and limit risks related to the use of FST. We found FST is applied to almost 100% of sown seeds for the most important arable crops worldwide. Fungicides belonging to 10 chemical families and with one or several types of mobility (contact, locally systemic, and xylem mobile) are used for seed treatment, although the majority are xylem mobile. Seed treatments are applied by the seed distributor, the seed company, and the farmer, although the proportion of seed lots treated by these three groups vary from one crop to another. The average quantity of fungicide active ingredient (a.i.) applied via seed treatment depends on the crop species, environment(s) into which seed is planted, and regional or local regulations. Cost-effectiveness, protection of the seed and seedlings from pathogens up to 4–5 weeks from sowing, user friendliness, and lower impact on human health and nontarget soil organisms compared with foliar spray and broadcast application techniques, are among the most claimed benefits attributed to FST. In contrast, inconsistent economic benefits, development of resistance by soilborne pathogens to many fungicides, exposure risks to operators, and negative impacts on nontarget soil organisms are the key identified risks related to FST. We propose eight recommendations to reduce risks related to FST and to increase their benefits.

Effect of potash fertilization on Helminthosporium leaf blight severity in wheat, and associated increases in grain yield and kernel weight

2005 ◽  
Vol 93 (2-3) ◽  
pp. 142-150 ◽  
Author(s):  
Sarala Sharma ◽  
Etienne Duveiller ◽  
Roshan Basnet ◽  
Chandra B. Karki ◽  
Ram C. Sharma
Keyword(s):  
Grain Yield ◽  
Kernel Weight ◽  
Leaf Blight ◽  
Helminthosporium Leaf Blight

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

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.

scholarly journals Efektivitas Formulasi Spora Bacillus subtilis B12 sebagai Agen Pengendali Hayati Penyakit Hawar Daun Bakteri pada Tanaman Padi

2015 ◽  
Vol 34 (1) ◽  
pp. 21 ◽  
Author(s):  
Wartono Wartono ◽  
Giyanto Giyanto ◽  
Kikin H. Mutaqin
Keyword(s):  
Bacillus Subtilis ◽  
Plant Growth ◽  
Foliar Spray ◽  
Leaf Blight ◽  
Plant Diseases ◽  
Bacterial Leaf Blight ◽  
Growth Promoter ◽  
Negative Effect ◽  
Plant Growth Promoting ◽  
Blight Disease

<p>Bacterial leaf blight control in rice (Oryza sativa Lin.) using bactericide is prohibitive, due to its high cost and its negative effect on the environment. Biocontrol when avaible, therefore is the best alternative solution. Bacillus subtilis is a perspective of biocontrol agent to control several plant diseases, because of its ability to produce antimicrobial and produce plant growth promoting substances. This research was aimed to examine the effectiveness of B. subtilis spore formulation by way of seed treatments and foliar sprays, using different frequencies and concentrations, to control bacterial leaf blight disease (BLB) on rice, caused by Xanthomonas oryzae pv. oryzae, and to evaluate its function as plant growth promoter. The experiments were conducted at greenhouse and in the field using factorial design. At the greenhouse experiment, seed treatment and foliar spray, using concentration of 2% produced better result in controlling BLB, and better result on promoting rice plant growth. In the field experiment, application at 2 week interval showed better effect on suppressing the the disease and on increasing yield. Applications of the formulation of B. subtilis B12 spore reduced BLB disease by 21% and potentially increased yield up to 50%.</p>

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