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Controlling Foliar Blight of Wheat through Nutrient Management and Varietal Selection / Yuva R. Kandel in Nepal Agriculture Research Journal, Vol. 9 (2009)
[article]
Title : Controlling Foliar Blight of Wheat through Nutrient Management and Varietal Selection Material Type: printed text Authors: Yuva R. Kandel, Author ; Jay P. Mahato, Author Publication Date: 2009 Article on page: 77-83 p. Languages : English (eng) Keywords: AUDPC, Bipolaris sorokiniana, disease resistance, grainyield, Helminthosporium leaf blight, Pyrenophora tritici-repentis Abstract: Helminthosporium leaf blight, a complex of spot blotch caused by Bipolaris
sorokiniana and tan spot caused by Pyrenophora tritici-repentis, is one of
the most important foliar diseases of wheat in Nepal. It appears in almost all
wheat growing areas and causes severe yield loss every year. A study was
conducted at Regional Agriculture Research Station (RARS), Tarahara,
Sunsari during 2004-05 and 2005-06 wheat growing seasons to elucidate role
of nitrogen in wheat genotypes for management of the disease. Field
experiment was laid out on split plot design with three replications. Four
doses of nitrogen in six different promising genotypes were tested. Nitrogen
levels higher than 50 kg ha-1 significantly reduced disease severity and
increased grain yield in all genotypes but there was no significant differences
in grain yield in the first year. In the second year, grain yield difference
among the genotypes was significant. Area under disease progress curve
(AUDPC) was not significant between two doses 100 and 150 kg ha-1. The
wheat genotypes showed different reactions to disease. Genotype BL 2047
had the lowest incidence of disease followed by BL 1887, whereas BL 2217
had the highest incidence of the disease. Genotype BL 2196 produced the
highest grain yield (2172 kg ha-1) and the lowest grain yield was obtained in
Bhrikuti followed by BL 2089. These results suggested that fertilizer should
be applied in soil at balanced dose 100:50:50 N:P2O5:K2O kg ha-1. Growing
relatively resistant genotypes with the balance dose of fertilizers can reduce
foliar blight severity in wheat.Link for e-copy: http://elibrary.narc.gov.np/?r=11
in Nepal Agriculture Research Journal > Vol. 9 (2009) . - 77-83 p.[article] Controlling Foliar Blight of Wheat through Nutrient Management and Varietal Selection [printed text] / Yuva R. Kandel, Author ; Jay P. Mahato, Author . - 2009 . - 77-83 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 9 (2009) . - 77-83 p.
Keywords: AUDPC, Bipolaris sorokiniana, disease resistance, grainyield, Helminthosporium leaf blight, Pyrenophora tritici-repentis Abstract: Helminthosporium leaf blight, a complex of spot blotch caused by Bipolaris
sorokiniana and tan spot caused by Pyrenophora tritici-repentis, is one of
the most important foliar diseases of wheat in Nepal. It appears in almost all
wheat growing areas and causes severe yield loss every year. A study was
conducted at Regional Agriculture Research Station (RARS), Tarahara,
Sunsari during 2004-05 and 2005-06 wheat growing seasons to elucidate role
of nitrogen in wheat genotypes for management of the disease. Field
experiment was laid out on split plot design with three replications. Four
doses of nitrogen in six different promising genotypes were tested. Nitrogen
levels higher than 50 kg ha-1 significantly reduced disease severity and
increased grain yield in all genotypes but there was no significant differences
in grain yield in the first year. In the second year, grain yield difference
among the genotypes was significant. Area under disease progress curve
(AUDPC) was not significant between two doses 100 and 150 kg ha-1. The
wheat genotypes showed different reactions to disease. Genotype BL 2047
had the lowest incidence of disease followed by BL 1887, whereas BL 2217
had the highest incidence of the disease. Genotype BL 2196 produced the
highest grain yield (2172 kg ha-1) and the lowest grain yield was obtained in
Bhrikuti followed by BL 2089. These results suggested that fertilizer should
be applied in soil at balanced dose 100:50:50 N:P2O5:K2O kg ha-1. Growing
relatively resistant genotypes with the balance dose of fertilizers can reduce
foliar blight severity in wheat.Link for e-copy: http://elibrary.narc.gov.np/?r=11 Influence of Long-term Use of Organic and Inorganic Nutrients on HLB Disease of Wheat under Rice-Wheat Cropping Pattern / Deepak Bhandari in Nepal Agriculture Research Journal, Vol. 9 (2009)
[article]
Title : Influence of Long-term Use of Organic and Inorganic Nutrients on HLB Disease of Wheat under Rice-Wheat Cropping Pattern Material Type: printed text Authors: Deepak Bhandari, Author ; Regmi, A.P., Author Publication Date: 2009 Article on page: 69-76 p Languages : English (eng) Keywords: AUDPC, FYM, Helminthosporium leaf blight, potassium Abstract: Helminthosporium leaf blight (HLB) is one of the most destructive diseases
of wheat in terai (plain) region of Nepal. This study was conducted to
determine the effect of long-term application of various levels of nitrogen
(N), phosphorus (P), potassium (K) and organic nutrients on HLB disease of
wheat. The experiment was superimposed on long-term fertility experiment
conducted in RCB design with three replications under rice-wheat cropping
pattern at National wheat research program (NWRP), Bhairahawa, Nepal.
The treatments include various combinations of nitrogen 100 kg ha-1,
phosphorus 0 and 60 kg ha-1, and potash 0, 50 and 100 kg ha-1 with or
without Sesbania (Sesbania cannabina) and farm yard manure (FYM). Area
under disease progress curve (AUDPC) was calculated using the disease
scores and yield parameters were recorded. Among the inorganic nutrients,
long-term deficiency of potash in the field markedly enhances the HLB
disease. Application of phosphorus in various doses increased the HLB
severity in absence of potash. Regular application of at least potash 50 kg ha-
1 in wheat noticeably reduced the HLB disease. Regular use of FYM 10 ton
ha-1 for long-term considerably reduced the HLB disease but long-term use
of Sesbania as green manure did not show any impact on HLB severity.
Inclusion of potash in nutrients considerably increased the yield and
thousand grain weight (TGW) of wheat. In long term, balanced use of
inorganic and organic nutrients with special attention on regular inclusion of
potash and FYM in the nutrient combinations is vital in suppression of HLB
disease under rice-wheat cropping pattern.Link for e-copy: http://elibrary.narc.gov.np/?r=10
in Nepal Agriculture Research Journal > Vol. 9 (2009) . - 69-76 p[article] Influence of Long-term Use of Organic and Inorganic Nutrients on HLB Disease of Wheat under Rice-Wheat Cropping Pattern [printed text] / Deepak Bhandari, Author ; Regmi, A.P., Author . - 2009 . - 69-76 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 9 (2009) . - 69-76 p
Keywords: AUDPC, FYM, Helminthosporium leaf blight, potassium Abstract: Helminthosporium leaf blight (HLB) is one of the most destructive diseases
of wheat in terai (plain) region of Nepal. This study was conducted to
determine the effect of long-term application of various levels of nitrogen
(N), phosphorus (P), potassium (K) and organic nutrients on HLB disease of
wheat. The experiment was superimposed on long-term fertility experiment
conducted in RCB design with three replications under rice-wheat cropping
pattern at National wheat research program (NWRP), Bhairahawa, Nepal.
The treatments include various combinations of nitrogen 100 kg ha-1,
phosphorus 0 and 60 kg ha-1, and potash 0, 50 and 100 kg ha-1 with or
without Sesbania (Sesbania cannabina) and farm yard manure (FYM). Area
under disease progress curve (AUDPC) was calculated using the disease
scores and yield parameters were recorded. Among the inorganic nutrients,
long-term deficiency of potash in the field markedly enhances the HLB
disease. Application of phosphorus in various doses increased the HLB
severity in absence of potash. Regular application of at least potash 50 kg ha-
1 in wheat noticeably reduced the HLB disease. Regular use of FYM 10 ton
ha-1 for long-term considerably reduced the HLB disease but long-term use
of Sesbania as green manure did not show any impact on HLB severity.
Inclusion of potash in nutrients considerably increased the yield and
thousand grain weight (TGW) of wheat. In long term, balanced use of
inorganic and organic nutrients with special attention on regular inclusion of
potash and FYM in the nutrient combinations is vital in suppression of HLB
disease under rice-wheat cropping pattern.Link for e-copy: http://elibrary.narc.gov.np/?r=10