scholarly journals Stemphylium blight (Stemphylium botryosum) reduces milling qualities of Lentil (Lens culinaris Medik)

2020 ◽  
Author(s):  
Maya Subedi ◽  
Navid Bazghaleh ◽  
Kiela Caudillo‐Ruiz ◽  
Albert Vandenberg
Keyword(s):  
Lens Culinaris ◽  
Stemphylium Botryosum ◽  
Stemphylium Blight

scholarly journals Efficacy of fungicides to control Stemphylium blight (Stemphylium botryosum) of lentil

2015 ◽  
Vol 40 (2) ◽  
pp. 229-233 ◽  
Author(s):  
M Shahiduzzaman ◽  
M Abul Hossain ◽  
ND Kundu
Keyword(s):  
Field Experiment ◽  
Foliar Spray ◽  
Stemphylium Botryosum ◽  
Stemphylium Blight ◽  
Disease Pressure

A field experiment was carried out during Rabi seasons of 2011-12 and 2012-13 to evaluate the efficacy of fungicides in controlling Stemphylium blight (S. botryosum) of lentil. Five fungicides were evaluated under higher disease pressure (106 ml-1) of Stemphylium blight. Results revealed that Foliar spray (4 sequences) with Rovral 50WP (Iprodione) @ (0.2%) and Secure 600WG (Fenamidione+Mancozeb) @ (0.2%) at an interval of 7 days effectively controlled the disease and increased yield of lentil by 31.99% and 28.20%, respectively. The fungicides may be selected for control of the disease.Bangladesh J. Agril. Res. 40(2): 229-233 June 2015

scholarly journals Verification of disease management technology on lentil against Stemphylium blight at farmer’s field in Nepal

2018 ◽  
Vol 1 (1) ◽  
pp. 51-61
Author(s):  
Subash Subedi ◽  
Sarswati Neupane
Keyword(s):  
Lens Culinaris ◽  
Block Design ◽  
Cost Ratio ◽  
Row Spacing ◽  
Benefit Cost Ratio ◽  
Plot Size ◽  
Management Technology ◽  
Randomized Complete Block Design ◽  
Stemphylium Blight ◽  
Benefit Cost

Technologies generated from lentil (Lens culinaris Medik) stemphylium blight (Stemphylium botryosum Walr) management experiments were verified at farmers field of 5 districts viz., Chitawan, Rautahat, Dang, Parsa and Banke during two winter seasons of 2013-2014 and 2014- 2015. The experiment was laid out in randomized complete block design with factorial arrangement of treatments and replicated 4 times. The plot size was 340 m2 (1 Kattha) with 25 cm row to row spacing. There were altogether 3 factors of the experiment i.e. year (2013-2014 and 2014-2015), location (5 districts) and package of practice (improved and farmers practice). The higher crop yield (1142.50 kg/ha) with lower disease index (34.95%) and higher benefit cost ratio of 2.42 were recorded in the farmers field of Banke district following seed rate (30 kg/ha), 8 hour primed improved variety (Black lentil), fertilizer doze of (20:40:20 NPK kg/ha+ 1 kg/ha B basal doze) and subsequent 3 sprays of Dithane M-45 @ 2.5 g/l of water at 10 days interval.

Evaluation of resistance to stemphylium blight in interspecific recombinant inbred lines derived from Lens culinaris × Lens ervoides

2020 ◽  
Vol 18 (4) ◽  
pp. 251-258
Author(s):  
Stanley Adobor ◽  
Rajib Podder ◽  
Sabine Banniza ◽  
Albert Vandenberg
Keyword(s):  
Disease Severity ◽  
Recombinant Inbred ◽  
Lens Culinaris ◽  
Research Centre ◽  
Blight Resistance ◽  
Resistant Parent ◽  
Controlled Conditions ◽  
Severity Scores ◽  
Ril Population ◽  
Stemphylium Blight

AbstractCultivated lentil suffers yield loss from stemphylium blight, caused by Stemphylium botryosum Wallr. Identification of sources of stemphylium blight resistance and knowledge of the mode of inheritance of resistance are important for developing resistant cultivars. The interspecific recombinant inbred line (RIL) population developed from a cross between the moderately resistant parent Lens culinaris cv. ‘Eston’ and the resistant parent L. ervoides (Brign.) Grande accession IG 72815 was evaluated for stemphylium blight resistance under controlled conditions at the University of Saskatchewan, Saskatoon, Canada, and under field conditions at the Pulses Research Centre (PRC), Ishurdi, Bangladesh. We hypothesized that resistance from both parents will lead to transgressive segregation indicative of pyramiding of resistance genes from the same. However, no resistant transgressive segregants were observed in the RIL population. A large proportion (50%) of the RILs had disease severity levels similar to the resistant parent IG 72815 in experiments conducted under natural disease pressure in Bangladesh. Under controlled conditions in Saskatoon, 38% of RILs had resistance levels similar to IG 72815. Across all environments, 14 RILs consistently had resistance levels similar to IG 72815. The distribution of disease severity scores for all RILs indicated polygenic inheritance of stemphylium blight resistance in the population. RILs with consistent resistant reactions should prove useful for lentil improvement programmes. This will contribute to increasing the productivity of lentil crops in North America and the Indo-Gangetic region, which account for more than 68% of world lentil production.

scholarly journals Influence of sowing dates on stemphylium blight disease severity and yield performance of lentil at Rampur, Chitwan, Nepal

2018 ◽  
pp. 129-136 ◽  
Author(s):  
S. Subedi ◽  
S. M. Shrestha ◽  
G. B. Khatri-Chhetri ◽  
R. B. Thapa ◽  
S. K. Ghimire ◽  
...  
Keyword(s):  
Disease Severity ◽  
Lens Culinaris ◽  
Sowing Date ◽  
Field Conditions ◽  
Disease Development ◽  
Yield Performance ◽  
Sowing Dates ◽  
Stemphylium Blight ◽  
Blight Disease ◽  
Year 2013

A study on lentil (Lens culinaris Medik) was carried out at Rampur, Chitwan with different sowing dates under field conditions to assess the severity of Stemphylium blight disease severity and yield performance during two consecutive years 2012-2014. During 2012/013, lower (3.00) and higher disease severity (6.50) were recorded on lentil plants sown on November 6 and December 16, respectively. Early sown lentil resulted in higher yield (2025 kg/ha) followed by late shown one (1213 kg/ha). Similarly, trends of disease development were similar in succeeding year (2013/14). Lentil seed shown on November 1 had lower disease severity (3.50) and produced higher yield (962.50 kg/ha) compared to that were shown on later dates. Disease severity increased with the advancement of sowing date from November 1 to December 21 with decreased yields. Hence, over years, early shown lentil (November 1, 6 and 11) escaped the higher severity of Stemphylium blight with the increase in yield.Journal of the Institute of Agriculture and Animal Science.Vol. 33-34, 2015, Page: 129-136

scholarly journals An advanced lentil backcross population developed from a cross between Lens culinaris × L. ervoides for future disease resistance and genomic studies

2021 ◽  
Author(s):  
Tadesse S Gela ◽  
Stanley Adobor ◽  
Hamid Khazaei ◽  
Albert Vandenberg
Keyword(s):  
Disease Resistance ◽  
Seed Coat ◽  
Lens Culinaris ◽  
Flower Colour ◽  
Coat Colour ◽  
Backcross Population ◽  
Biotic Stresses ◽  
Advanced Backcross ◽  
Advanced Backcross Population ◽  
Stemphylium Blight

AbstractGenetically accessible variation to some of the abiotic and biotic stresses are limited in the cultivated lentil (Lens culinaris Medik.) germplasm. Introgression of novel alleles from its wild relative species might be required for enhancing the genetic improvement of the crop. L. ervoides, one of the wild relatives of lentil, is a proven source of disease resistance for the crop. Here we introduce a lentil advanced backcross population (LABC-01) developed in cultivar CDC Redberry background, based on L. ervoides alleles derived from an interspecific recombinant inbred population, LR-59-81. Two-hundred and seventeen individuals of the LABC-01 population at BC2F3:4 generation were screened for the race 0 of anthracnose (Colletotrichum lentis) and stemphylium blight (Stemphylium botryosum) under controlled conditions. The population showed significant variations for both diseases and transfer of resistance alleles into the elite cultivar was evident. It also segregated for other traits such as days to flowering, seed coat colour, seed coat pattern and flower colour. Overall, we showed that LABC-01 population can be used in breeding programs worldwide to improve disease resistance and will be available as a valuable genetic resource for future genetic analysis of desired loci introgressed from L. ervoides.

Screening of wild and cultivated lentil germplasm for resistance to stemphylium blight

2012 ◽  
Vol 11 (1) ◽  
pp. 26-35 ◽  
Author(s):  
Rajib Podder ◽  
Sabine Banniza ◽  
Albert Vandenberg
Keyword(s):  
Lens Culinaris ◽  
Ascochyta Blight ◽  
Severity Scores ◽  
Ascochyta Lentis ◽  
Stemphylium Blight ◽  
Cultivated Species ◽  
Lens Nigricans ◽  
Wild Lentil ◽  
Potential Use ◽  
Disease Severity Scores

Lens culinaris Medik. ssp. culinaris is the only cultivated species in the genus Lens. Intensive selection pressure to develop new cultivars, a narrow genetic base, co-evolution of pathogens to partially resistant cultivars and other factors have accelerated susceptibility to different fungal diseases in this species. Few sources for resistance to stemphylium blight (SB) caused by Stemphylium botryosum Wallr. exist among commercial lentil cultivars. A total of 70 accessions were selected from seven species of the genus Lens to screen for SB resistance. The L. culinaris accessions were screened in four different environments, and the accessions of Lens ervoides, L. culinaris ssp. orientalis, Lens tomentosus,Lens nigricans, Lens odemensis and Lens lamottei in growth chamber or greenhouse experiments to identify resistance sources for potential use in lentil breeding. A highly aggressive isolate of SB was used as an inoculum to screen them under controlled conditions. Lentil cultivars ‘Eston’ (resistant) and ‘CDC Glamis’ (susceptible) were used as checks with consistent results in all experiments. Most of the L. culinaris accessions were susceptible to SB, whereas more than 70% of the wild lentil accessions had disease severity scores equal to or significantly lower than that of the SB-resistant check ‘Eston’. Some wild species accessions previously identified with resistance to anthracnose (Colletotrichum truncatum) and ascochyta blight (Ascochyta lentis) were also highly resistant to SB. The highest frequency of resistance to SB was found in L. lamottei followed by L. ervoides of the secondary gene pool. These sources can potentially be used to develop new commercial cultivars with multiple or single disease resistance.

scholarly journals Source of resistant against Fusarium wilt and Stemphylium blight in lentil (Lens culinaris Medikus)

2017 ◽  
Vol 5 (1) ◽  
pp. 102-107 ◽  
Author(s):  
N.K. Yadav ◽  
S.K. Ghimire ◽  
S.M. Shrestha ◽  
B.P. Sah ◽  
A. Sarker ◽  
...  
Keyword(s):  
Fusarium Wilt ◽  
Lens Culinaris ◽  
Agricultural Research ◽  
Research Area ◽  
Research Station ◽  
Crop Failure ◽  
Potential Threat ◽  
Stemphylium Blight ◽  
Augmented Design ◽  
Moderately Resistant

The crop yield of lentil is below attainable levels which are mainly attributed to pathological factors especially lentil wilt caused by Fusarium oxysporum f.sp. lentis and Stemphylium blight caused by Stemphylium botryosum .Fusarium wilt is a potential threat to letil production not only in Nepal but worldwide that can cause complete crop failure. While stemphylium blight is recently being serious problem to Bangladesh, Nepal and India. In Nepal, multiple disease resistance work was not reported in lentil before the present study. Two trials separately using 185 genotypes were conducted to study the wilt and stem phylium blight were conducted. For wilt screening one hundred eighty five lentil lines including resistant check ILL7164 and susceptible check sindur, were sown in a previously developed wilt sick bed, while for stem phylium blight serarate trial was conducted in the research area of Regional Agricultural Research Station Nepalgunj using augmented design. Natural inoculums were also relied upon. Disease severity data were recorded. Results revealed that incase of Fusarium wilt sixteen genotypes were found resistant and twenty-three moderately resistant while in case of Stemphylium blight 87 resistant and 36 moderately resistant in field condition. It also indicated that 9 genotypes i.e RL-13,RL-21,ILL6468,ILL9996,\ILL6024,ILL6811,ILL7164,Arun,Maheswar bharti showed combined resistant to both the diseases.Int. J. Appl. Sci. Biotechnol. Vol 5(1): 102-107

scholarly journals An advanced lentil backcross population developed from a cross between Lens culinaris × L. ervoides for future disease resistance and genomic studies

2021 ◽  
pp. 1-7
Author(s):  
Tadesse S. Gela ◽  
Stanley Adobor ◽  
Hamid Khazaei ◽  
Albert Vandenberg
Keyword(s):  
Disease Resistance ◽  
Seed Coat ◽  
Lens Culinaris ◽  
Flower Colour ◽  
Coat Colour ◽  
Backcross Population ◽  
Biotic Stresses ◽  
Advanced Backcross ◽  
Stemphylium Blight ◽  
Breeding Programmes

Abstract Genetically accessible variation to some of the abiotic and biotic stresses are limited in the cultivated lentil (Lens culinaris Medik.) germplasm. Introgression of novel alleles from its wild relative species will be useful for enhancing the genetic improvement of the crop. L. ervoides, one of the wild relatives of lentil, is a proven source of disease resistance for the crop. Here we introduce a lentil advanced backcross (LABC-01) population developed in cultivar ‘CDC Redberry’ background, based on L. ervoides alleles derived from an interspecific recombinant inbred population, LR-59-81. Two-hundred and seventeen individuals of the LABC-01 population at BC2F3:4 generation were screened for the race 0 of anthracnose (Colletotrichum lentis) and stemphylium blight (Stemphylium botryosum) under controlled conditions. The population showed significant variations for both diseases and the transfer of resistance alleles into the elite cultivar was evident. It also segregated for other traits such as days to flowering, seed coat colour, seed coat pattern and flower colour. Overall, we showed that LABC-01 population can be used in breeding programmes worldwide to improve disease resistance and will be available as a valuable genetic resource for future genetic analysis of desired loci introgressed from L. ervoides.

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