Evaluation of Common Nepalese Rice Cultivars Against Rice Root Knot Nematode / Deepak Sharma Paudyal in Nepal Agriculture Research Journal, Vol. 5 (2004)  

Public ISBD [article]  inNepal Agriculture Research Journal > Vol. 5 (2004) . - 33-36 p Title : Evaluation of Common Nepalese Rice Cultivars Against Rice Root Knot Nematode Material Type: printed text Authors: Deepak Sharma Paudyal, Author ; Ramesh R. Pokharel, Author ; Sundar M. Shrestha, Author ; G.B. Khatri Chhetri, Author Publication Date: 2004 Article on page: 33-36 p Languages : English (eng) Keywords: Meloidogyne  graminicola,  Oryza  sativa,  resistant  sources Abstract: Twelve commonly cultivated rice cultivars viz. Radha-7, Ghaiya-2, Rampur Masuli, Bindeshwari, Makawanpur-1, Sabitri, Janaki, Chaite-2, Radha-9, Radha-4, Chaite-6 and Masuli were tested against rice root knot nematode (Meloidogyne graminicola) in sick soil under greenhouse condition. Resistance screening of the cultivars was done based on the reproducibility of M. graminicola to IR-29 susceptible check and disease intensity grade was classified on the basis of root knot index. All the cultivars were susceptible to M. graminicola except Masuli and Chaite-6, which were moderately resistant. Ghaiya-2 and Janaki were even more susceptible than IR-29 and these cultivars can be used as susceptible check instead of IR- 29. Since the common cultivars were susceptible to M. graminicola, it is necessary to screen more rice cultivars to explore resistant sources against root knot nematode of rice. Link for e-copy: http://elibrary.narc.gov.np/?r=76 [article] Evaluation of Common Nepalese Rice Cultivars Against Rice Root Knot Nematode [printed text] / Deepak Sharma Paudyal, Author ; Ramesh R. Pokharel, Author ; Sundar M. Shrestha, Author ; G.B. Khatri Chhetri, Author . - 2004 . - 33-36 p. Languages : English (eng) in Nepal Agriculture Research Journal > Vol. 5 (2004) . - 33-36 p Keywords: Meloidogyne  graminicola,  Oryza  sativa,  resistant  sources Abstract: Twelve commonly cultivated rice cultivars viz. Radha-7, Ghaiya-2, Rampur Masuli, Bindeshwari, Makawanpur-1, Sabitri, Janaki, Chaite-2, Radha-9, Radha-4, Chaite-6 and Masuli were tested against rice root knot nematode (Meloidogyne graminicola) in sick soil under greenhouse condition. Resistance screening of the cultivars was done based on the reproducibility of M. graminicola to IR-29 susceptible check and disease intensity grade was classified on the basis of root knot index. All the cultivars were susceptible to M. graminicola except Masuli and Chaite-6, which were moderately resistant. Ghaiya-2 and Janaki were even more susceptible than IR-29 and these cultivars can be used as susceptible check instead of IR- 29. Since the common cultivars were susceptible to M. graminicola, it is necessary to screen more rice cultivars to explore resistant sources against root knot nematode of rice. Link for e-copy: http://elibrary.narc.gov.np/?r=76

Intensity of Common Root Rot on Wheat Genotypes / Deepak Bhandari in Nepal Agriculture Research Journal, Vol. 5 (2004)  

Public ISBD [article]  inNepal Agriculture Research Journal > Vol. 5 (2004) . - 46-48 p Title : Intensity of Common Root Rot on Wheat Genotypes Material Type: printed text Authors: Deepak Bhandari, Author ; Sundar M. Shrestha, Author Publication Date: 2004 Article on page: 46-48 p Languages : English (eng) Keywords: Bipolaris  sorokiniana,  common  root  rot,  dry  land  wheat Abstract: Common root rot of wheat caused by Bipolaris sorokiniana (Sacc. in Sorok.) has been an emerging problem in Nepal. This study was conducted to determine the level of resistance in promising wheat genotypes. Thirty wheat genotypes were tested under natural epiphytotic condition for the intensity of infection on subcrown internode and crown root. None of the wheat varieties were found immune common root rot. However, genotype BL 2246, BL 2203, CHAM-4 and BL 2262 had low level of infection denoting resistant character. Most of the genotypes had moderate level of root rot index that ranged from 20-35 percent. Genotypes BL 2302, BL 1724 had more than 50 percent root rot index. The resistant genotypes have to be further tested under artificial and sick plot condition for confirmation of the above result. Link for e-copy: http://elibrary.narc.gov.np/?r=78 [article] Intensity of Common Root Rot on Wheat Genotypes [printed text] / Deepak Bhandari, Author ; Sundar M. Shrestha, Author . - 2004 . - 46-48 p. Languages : English (eng) in Nepal Agriculture Research Journal > Vol. 5 (2004) . - 46-48 p Keywords: Bipolaris  sorokiniana,  common  root  rot,  dry  land  wheat Abstract: Common root rot of wheat caused by Bipolaris sorokiniana (Sacc. in Sorok.) has been an emerging problem in Nepal. This study was conducted to determine the level of resistance in promising wheat genotypes. Thirty wheat genotypes were tested under natural epiphytotic condition for the intensity of infection on subcrown internode and crown root. None of the wheat varieties were found immune common root rot. However, genotype BL 2246, BL 2203, CHAM-4 and BL 2262 had low level of infection denoting resistant character. Most of the genotypes had moderate level of root rot index that ranged from 20-35 percent. Genotypes BL 2302, BL 1724 had more than 50 percent root rot index. The resistant genotypes have to be further tested under artificial and sick plot condition for confirmation of the above result. Link for e-copy: http://elibrary.narc.gov.np/?r=78

Resistance in Groundnut Genotypes to Cercospara Leaf Spot Disease and its Relation with Yield / Shree B. Thakur in Nepal Agriculture Research Journal, Vol.12 (2012)  

Public ISBD [article]  inNepal Agriculture Research Journal > Vol.12 (2012) . - 63-70p. Title : Resistance in Groundnut Genotypes to Cercospara Leaf Spot Disease and its Relation with Yield Material Type: printed text Authors: Shree B. Thakur, Author ; Surya K. Ghimire, Author ; Sundar M. Shrestha, Author Publication Date: 2012 Article on page: 63-70p. Languages : English (eng) Keywords: Cercospora  leaf  spot,  Groundnut,  Incidence,  Resistance,  Tolerance Link for e-copy: http://elibrary.narc.gov.np/?r=1285 [article] Resistance in Groundnut Genotypes to Cercospara Leaf Spot Disease and its Relation with Yield [printed text] / Shree B. Thakur, Author ; Surya K. Ghimire, Author ; Sundar M. Shrestha, Author . - 2012 . - 63-70p. Languages : English (eng) in Nepal Agriculture Research Journal > Vol.12 (2012) . - 63-70p. Keywords: Cercospora  leaf  spot,  Groundnut,  Incidence,  Resistance,  Tolerance Link for e-copy: http://elibrary.narc.gov.np/?r=1285

Resistance in Rice Breeding Lines to the Blast Fungus in Nepal / Bedananda Chaudhary in Nepal Agriculture Research Journal, Vol. 6 (2005)  

Public ISBD [article]  inNepal Agriculture Research Journal > Vol. 6 (2005) . - 49-56 p Title : Resistance in Rice Breeding Lines to the Blast Fungus in Nepal Material Type: printed text Authors: Bedananda Chaudhary, Author ; Sundar M. Shrestha, Author ; Sharma, R.C., Author Publication Date: 2005 Article on page: 49-56 p Languages : English (eng) Keywords: Blast  resistance,  field  condition,  greenhouse  assay,  Pyricularia  grisea,  rice  lines Abstract: A total of 36 rice breeding lines including checks were evaluated for resistance to blast at Rampur during 2000-2001. The experiments were conducted under both field condition and greenhouse inoculated condition. Qualitative resistance in rice to blast was assessed based on lesion type, whereas quantitative resistance was assessed based on area under disease progress curve (AUDPC) in the upland field condition. The number of sporulating lesions and the number of leaves with at least one sporulating lesion per plant were considered as measures for evaluation of quantitative resistance in the greenhouse assay. The lesion type, neck blast percentage and AUDPC data suggest that most of the rice lines possess higher level of resistance to leaf and neck blast. The rice lines varied for the number of sporulating lesions and the number of leaves with sporulating lesion per plant. Some lines were incompatible to virulent blast isolates, showing major resistance genes. NR 1558, NR 601-1-1-9, BW306-2 and CN 836-3-10 were promising lines for quantitative resistance to both leaf and neck blast. Radha 12, Sabitri, Janaki possess higher level of quantitative resistance to blast, hence these could be promoted for cultivation in blast-prone environments. These genotypes could also be utilized as donor parents for breeding durable blast resistant varieties. The most virulent blast isolate could be used for evaluation of both qualitative and quantitative resistance to blast in early generation in the greenhouse so that workload could be cut down in future works. Link for e-copy: http://elibrary.narc.gov.np/?r=61 [article] Resistance in Rice Breeding Lines to the Blast Fungus in Nepal [printed text] / Bedananda Chaudhary, Author ; Sundar M. Shrestha, Author ; Sharma, R.C., Author . - 2005 . - 49-56 p. Languages : English (eng) in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 49-56 p Keywords: Blast  resistance,  field  condition,  greenhouse  assay,  Pyricularia  grisea,  rice  lines Abstract: A total of 36 rice breeding lines including checks were evaluated for resistance to blast at Rampur during 2000-2001. The experiments were conducted under both field condition and greenhouse inoculated condition. Qualitative resistance in rice to blast was assessed based on lesion type, whereas quantitative resistance was assessed based on area under disease progress curve (AUDPC) in the upland field condition. The number of sporulating lesions and the number of leaves with at least one sporulating lesion per plant were considered as measures for evaluation of quantitative resistance in the greenhouse assay. The lesion type, neck blast percentage and AUDPC data suggest that most of the rice lines possess higher level of resistance to leaf and neck blast. The rice lines varied for the number of sporulating lesions and the number of leaves with sporulating lesion per plant. Some lines were incompatible to virulent blast isolates, showing major resistance genes. NR 1558, NR 601-1-1-9, BW306-2 and CN 836-3-10 were promising lines for quantitative resistance to both leaf and neck blast. Radha 12, Sabitri, Janaki possess higher level of quantitative resistance to blast, hence these could be promoted for cultivation in blast-prone environments. These genotypes could also be utilized as donor parents for breeding durable blast resistant varieties. The most virulent blast isolate could be used for evaluation of both qualitative and quantitative resistance to blast in early generation in the greenhouse so that workload could be cut down in future works. Link for e-copy: http://elibrary.narc.gov.np/?r=61