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Author Prem C.P. Chaurasia |
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Refine your searchChemical Management of Leaf Blight (Bipolaris sorokiniana) of Wheat in Central Terai of Nepal / Prem C.P. Chaurasia in Nepal Agriculture Research Journal, Vol.11 (2011)
Title : Chemical Management of Leaf Blight (Bipolaris sorokiniana) of Wheat in Central Terai of Nepal Material Type: printed text Authors: Prem C.P. Chaurasia, Author ; Anandi Mandai, Author ; Jang B. Prasad, Author Publication Date: 2011 Article on page: 113-115p. Languages : English (eng) Keywords: AUPDC, Fungicides, Leaf blight, Wheat Link for e-copy: http://elibrary.narc.gov.np/?r=1225
in Nepal Agriculture Research Journal > Vol.11 (2011) . - 113-115p.[article] Chemical Management of Leaf Blight (Bipolaris sorokiniana) of Wheat in Central Terai of Nepal [printed text] / Prem C.P. Chaurasia, Author ; Anandi Mandai, Author ; Jang B. Prasad, Author . - 2011 . - 113-115p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol.11 (2011) . - 113-115p.
Keywords: AUPDC, Fungicides, Leaf blight, Wheat Link for e-copy: http://elibrary.narc.gov.np/?r=1225
Title : Chemical Management of Purple Blotch Disease of Onion Material Type: printed text Authors: Prem C.P. Chaurasia, Author ; Jung b. Prasad, Author ; Anandi Mandai, Author Publication Date: 2010 Article on page: 83-85 p. Languages : English (eng) Keywords: Disease management, onion, percent disease intensity, purple blotch Link for e-copy: http://elibrary.narc.gov.np/?r=1209
in Nepal Agriculture Research Journal > Vol.10 (2010) . - 83-85 p.[article] Chemical Management of Purple Blotch Disease of Onion [printed text] / Prem C.P. Chaurasia, Author ; Jung b. Prasad, Author ; Anandi Mandai, Author . - 2010 . - 83-85 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol.10 (2010) . - 83-85 p.
Keywords: Disease management, onion, percent disease intensity, purple blotch Link for e-copy: http://elibrary.narc.gov.np/?r=1209
Title : Economic Management of Late Blight (Phytophthora infestans L.) of Potato in Eastern Tarai of Nepal Material Type: printed text Authors: Prem C.P. Chaurasia, Author Publication Date: 2005 Article on page: 57-61 p Languages : English (eng) Keywords: Eastern Tarai, economic spray, Dithane M-45, late blight management, potato Abstract: Field experiments were carried out at Regional Agriculture Research Station, Tarahara in three
consecutive years (1997-2000) during winter season to know the economic sprays of different
fungicides to manage late blight disease of potato. Late blight susceptible cultivar of potato
Kufri Sindhuri was used for the experiment. Krinoxyl gold (metalaxyl 8% and mancozeb 64%)
at the rate of 1.5 g/l, Dithane M- 45 (mancozeb 75%) @ 0.3% and Bordeaux mixture @ 10 g
copper sulfate and 10 g lime/l of water and their different combinations were tested in
randomized complete block design with three replications. Terminal disease severity was the
highest (7.9) on 0-9 scale disease rating in unsprayed check and it was significantly higher than
those of other fungicides sprays. Plots with three sprays of Dithane M- 45 @ 0.3% recorded the
lowest (2.4) terminal disease severity. Disease development was the fastest in the unsprayed plot
compared to all other treatments. Similarly apparent infection rate was the highest in unsprayed
treatment. Area Under the Disease Progress Curve was also the highest in unsprayed plot and it
was significantly higher than those of other treatments. Tuber yield was the lowest (3.93 kg/4.5
m2 plot in unsprayed and the highest (6.08 kg), in the plot receiving four sprays of Dithane M-45
@ 0.3 % and this was at par with the tuber yield of plots receiving two and three sprays of
Dithane M-45. Benefit cost ratio was the highest (1.54) in case of two sprays of Dithane M-45
@ 0.3% at 10 days intervals. All others fungicide spays were uneconomical under Eastern Tarai
condition.Link for e-copy: http://elibrary.narc.gov.np/?r=62
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 57-61 p[article] Economic Management of Late Blight (Phytophthora infestans L.) of Potato in Eastern Tarai of Nepal [printed text] / Prem C.P. Chaurasia, Author . - 2005 . - 57-61 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 57-61 p
Keywords: Eastern Tarai, economic spray, Dithane M-45, late blight management, potato Abstract: Field experiments were carried out at Regional Agriculture Research Station, Tarahara in three
consecutive years (1997-2000) during winter season to know the economic sprays of different
fungicides to manage late blight disease of potato. Late blight susceptible cultivar of potato
Kufri Sindhuri was used for the experiment. Krinoxyl gold (metalaxyl 8% and mancozeb 64%)
at the rate of 1.5 g/l, Dithane M- 45 (mancozeb 75%) @ 0.3% and Bordeaux mixture @ 10 g
copper sulfate and 10 g lime/l of water and their different combinations were tested in
randomized complete block design with three replications. Terminal disease severity was the
highest (7.9) on 0-9 scale disease rating in unsprayed check and it was significantly higher than
those of other fungicides sprays. Plots with three sprays of Dithane M- 45 @ 0.3% recorded the
lowest (2.4) terminal disease severity. Disease development was the fastest in the unsprayed plot
compared to all other treatments. Similarly apparent infection rate was the highest in unsprayed
treatment. Area Under the Disease Progress Curve was also the highest in unsprayed plot and it
was significantly higher than those of other treatments. Tuber yield was the lowest (3.93 kg/4.5
m2 plot in unsprayed and the highest (6.08 kg), in the plot receiving four sprays of Dithane M-45
@ 0.3 % and this was at par with the tuber yield of plots receiving two and three sprays of
Dithane M-45. Benefit cost ratio was the highest (1.54) in case of two sprays of Dithane M-45
@ 0.3% at 10 days intervals. All others fungicide spays were uneconomical under Eastern Tarai
condition.Link for e-copy: http://elibrary.narc.gov.np/?r=62
Title : Management of Botrytis Gray Mold (Botrytis cinerea Pers. Ex. Fr.) of Chickpea at Tarahara, Nepal Material Type: printed text Authors: Prem C.P. Chaurasia, Author ; Sharada Joshi, Author Publication Date: 2000 Article on page: 37-41 p Languages : English (eng) Keywords: Key words: Botrytis gray mold, chickpea, Trichoderma Abstract: An experiment was conducted in randomized complete block design with six treatments and four
replications at loamy soil of Regional Agriculture Research Station, Tarahara, Nepal during
1997/98 and1998/99 seasons to find out the effect of bioagent Trichoderma viride as compared to
fungicide Bavistin (carbendazim) for management of Botrytis gray mold (Botrytis cinerea) of
chickpea (Cicer arietinum). Treatments were use of water spray (check), three sprays of T. viride
(10 7-108 spores/ml of water), three sprays of Bavistin @ 0.2%, three sprays of Bavistin @ 0.1%
+ T. viride, two sprays of Bavistin @ 0.2% and two sprays of T.viride. The area under the disease
progress curve (AUDPC) was the least (193.6) with three sprays of Bavistin (0.2%) followed by
two sprays of Bavistin (0.2%) and three sprays of Bavistin + T. viride (216.9). The highest mean
grain yield of 267.3 kg ha-1 was produced by three sprays of Bavistin + T. viride followed by
three sprays of Bavistin. Three sprays of T. viride was inferior to three and two sprays of Bavistin
but it was at par with two sprays of T. viride with respect to grain yield production and reduction
of Botrytis gray mold severity. When AUDPC was regressed against grain yield, a negative
correlation was obtained between the disease and the grain yield. The correlation coefficients for
the disease and yields during1997/98 and 1998/99 respectively were -0.583, and - 0.490.Link for e-copy: http://elibrary.narc.gov.np/?r=91
in Nepal Agriculture Research Journal > Vol. 4 (2000/2001) . - 37-41 p[article] Management of Botrytis Gray Mold (Botrytis cinerea Pers. Ex. Fr.) of Chickpea at Tarahara, Nepal [printed text] / Prem C.P. Chaurasia, Author ; Sharada Joshi, Author . - 2000 . - 37-41 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 4 (2000/2001) . - 37-41 p
Keywords: Key words: Botrytis gray mold, chickpea, Trichoderma Abstract: An experiment was conducted in randomized complete block design with six treatments and four
replications at loamy soil of Regional Agriculture Research Station, Tarahara, Nepal during
1997/98 and1998/99 seasons to find out the effect of bioagent Trichoderma viride as compared to
fungicide Bavistin (carbendazim) for management of Botrytis gray mold (Botrytis cinerea) of
chickpea (Cicer arietinum). Treatments were use of water spray (check), three sprays of T. viride
(10 7-108 spores/ml of water), three sprays of Bavistin @ 0.2%, three sprays of Bavistin @ 0.1%
+ T. viride, two sprays of Bavistin @ 0.2% and two sprays of T.viride. The area under the disease
progress curve (AUDPC) was the least (193.6) with three sprays of Bavistin (0.2%) followed by
two sprays of Bavistin (0.2%) and three sprays of Bavistin + T. viride (216.9). The highest mean
grain yield of 267.3 kg ha-1 was produced by three sprays of Bavistin + T. viride followed by
three sprays of Bavistin. Three sprays of T. viride was inferior to three and two sprays of Bavistin
but it was at par with two sprays of T. viride with respect to grain yield production and reduction
of Botrytis gray mold severity. When AUDPC was regressed against grain yield, a negative
correlation was obtained between the disease and the grain yield. The correlation coefficients for
the disease and yields during1997/98 and 1998/99 respectively were -0.583, and - 0.490.Link for e-copy: http://elibrary.narc.gov.np/?r=91
Title : Management of Leaf Blight (Bipolaris sorokiniana) Disease of Wheat with Cultural Practices Material Type: printed text Authors: Prem C.P. Chaurasia, Author ; Duveiller, E., Author Publication Date: 2006 Article on page: 63-69 p Languages : English (eng) Keywords: AUDPC, culture practices, disease management, leaf blight Abstract: An experiment was conducted at agronomy farm of Agriculture research Station, Tarahara,
Nepal for three consecutive years viz 2000/2001,2001/2002, and 2002/2003 to evaluate the
effects of different cultural practices on leaf blight diseases of wheat caused by Bipolaris
sorokiniana under terai conditions. The experiment was conducted in factorial Randomized
Complete Block Design with four replications. Four factors, two wheat verities RR-21 and
Nepal 297,two number of irrigations (two and three irrigations), two doses of Nitrogen fertilizer
viz. 60kg N/ha and 120 kg N/ha and two dates of sowing of wheat were examined. Different
yield components, grain yield (kg/plot) and disease severity were recorded to judge the effects of
these factors on severity of leaf blight of wheat. Nepal Line 297 had significantly less AUDPC
based on flag leaf infection and whole plan as compared to RR-21. Number of irrigations had no
significant effect on AUDPC, as there was frequent rain during experimental period. Doses of
Nitrogen fertilizer had significant effect on AUDPC based on flag leaf infection. It was higher in
case of 60 kg N/ha. The third week of November sowing of wheat had lower value of AUDPC
as compared to December sowing. Plant height, panicle lengths were highly significantly higher
in case of RR-21 as compared to Nepal-297. Thousand kernel weight, and grain yield kg/ha were
significantly higher in Nepal-297. All agronomic parameters except thousand kernel weight and
number of tillers/plan were significantly higher in 120kg N/ha. The third week of November
sowing of wheat had less plant height and panicle length, higher thousand kernel weight and
more grain yield. Leaf blight severity was highly significantly less in case of Nepal-297. Doses
of Nitrogen fertilizer had significant effect on plant height, panicle length, thousand kernel
weight, percentage flag leaf infection and AUDPC based on flag leaf infection. Based on the
results of three years of experimentations, it can be concluded that Nepal-297 had less disease,
number of irrigations had no effect on disease severity, higher doses of nitrogen fertilizer had
less flag infection and late sowing of wheat also had less disease. Numbers of irrigation’s effects
were inconclusive as there were frequent rains during experimentation period. Based on above
conclusion, it is recommended that growing wheat verity like Nepal-297, use of higher doses of
nitrogen fertilizer and sowing of wheat / first week of Dec help in minimizing the severity of leaf
blight. However late sowing had lowered grain yield.Link for e-copy: http://elibrary.narc.gov.np/?r=48
in Nepal Agriculture Research Journal > Vol. 7 (2006) . - 63-69 p[article] Management of Leaf Blight (Bipolaris sorokiniana) Disease of Wheat with Cultural Practices [printed text] / Prem C.P. Chaurasia, Author ; Duveiller, E., Author . - 2006 . - 63-69 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 7 (2006) . - 63-69 p
Keywords: AUDPC, culture practices, disease management, leaf blight Abstract: An experiment was conducted at agronomy farm of Agriculture research Station, Tarahara,
Nepal for three consecutive years viz 2000/2001,2001/2002, and 2002/2003 to evaluate the
effects of different cultural practices on leaf blight diseases of wheat caused by Bipolaris
sorokiniana under terai conditions. The experiment was conducted in factorial Randomized
Complete Block Design with four replications. Four factors, two wheat verities RR-21 and
Nepal 297,two number of irrigations (two and three irrigations), two doses of Nitrogen fertilizer
viz. 60kg N/ha and 120 kg N/ha and two dates of sowing of wheat were examined. Different
yield components, grain yield (kg/plot) and disease severity were recorded to judge the effects of
these factors on severity of leaf blight of wheat. Nepal Line 297 had significantly less AUDPC
based on flag leaf infection and whole plan as compared to RR-21. Number of irrigations had no
significant effect on AUDPC, as there was frequent rain during experimental period. Doses of
Nitrogen fertilizer had significant effect on AUDPC based on flag leaf infection. It was higher in
case of 60 kg N/ha. The third week of November sowing of wheat had lower value of AUDPC
as compared to December sowing. Plant height, panicle lengths were highly significantly higher
in case of RR-21 as compared to Nepal-297. Thousand kernel weight, and grain yield kg/ha were
significantly higher in Nepal-297. All agronomic parameters except thousand kernel weight and
number of tillers/plan were significantly higher in 120kg N/ha. The third week of November
sowing of wheat had less plant height and panicle length, higher thousand kernel weight and
more grain yield. Leaf blight severity was highly significantly less in case of Nepal-297. Doses
of Nitrogen fertilizer had significant effect on plant height, panicle length, thousand kernel
weight, percentage flag leaf infection and AUDPC based on flag leaf infection. Based on the
results of three years of experimentations, it can be concluded that Nepal-297 had less disease,
number of irrigations had no effect on disease severity, higher doses of nitrogen fertilizer had
less flag infection and late sowing of wheat also had less disease. Numbers of irrigation’s effects
were inconclusive as there were frequent rains during experimentation period. Based on above
conclusion, it is recommended that growing wheat verity like Nepal-297, use of higher doses of
nitrogen fertilizer and sowing of wheat / first week of Dec help in minimizing the severity of leaf
blight. However late sowing had lowered grain yield.Link for e-copy: http://elibrary.narc.gov.np/?r=48 Permalink
