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4 result(s) search for keyword(s) 'Alternaria' 




Role of weather on Alternaria Leaf Blight Disease and its effect on Yield and Yield Components of Mustard / Sundar K. Shrestha in Nepal Agriculture Research Journal, Vol. 6 (2005)
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Title : Role of weather on Alternaria Leaf Blight Disease and its effect on Yield and Yield Components of Mustard Material Type: printed text Authors: Sundar K. Shrestha, Author ; Lisa Munk, Author ; Mathur, S.B., Author Publication Date: 2005 Article on page: 62-72 p Languages : English (eng) Keywords: Alternaria brassicae, epidemics, iprodione, mancozeb, mustard, oil content Abstract: Alternaria leaf blight disease caused by Alternaria brassicae in mustard (Brassica juncea (L)
Czern and Coss) was studied in two crop seasons, 1992 and 1993 in Nepal at Nawalpur, Sarlahi
(Tarai) and Khumaltar, Lalitpur (mid hill). At Nawalpur, epidemics of the disease was recorded for
both seasons. Weather conditions like humidity, temperature and frequent rainfall played key role
for the epidemics. In experimental fields, the disease appeared first in mid-December when the
relative humidity was more than 80% with maximum temperature ranging between 18-250C and minimum
between 10-140C. At Khumaltar, incidence of the disease was low in both seasons due to low average
temperature from December to February. Among cultivars, Krishna and Pusabold were less susceptible
than Varuna. Both mancozeb and iprodione had effectively reduced disease in the sprayed plots and
increased seed yield by 48% and 130% respectively. The correlation between disease severity and
yield, and yield components was negative and highly significant. Average yield loss was estimated
to be in the range of 32 to 57%. Seed infection was also significantly higher in non sprayed
treatment than sprayed one. The disease showed a negative effect on oil content causing losses on
oil between 4.2 to 4.5%.Link for e-copy: http://elibrary.narc.gov.np/?r=63
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 62-72 p[article] Role of weather on Alternaria Leaf Blight Disease and its effect on Yield and Yield Components of Mustard [printed text] / Sundar K. Shrestha, Author ; Lisa Munk, Author ; Mathur, S.B., Author . - 2005 . - 62-72 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 62-72 p
Keywords: Alternaria brassicae, epidemics, iprodione, mancozeb, mustard, oil content Abstract: Alternaria leaf blight disease caused by Alternaria brassicae in mustard (Brassica juncea (L)
Czern and Coss) was studied in two crop seasons, 1992 and 1993 in Nepal at Nawalpur, Sarlahi
(Tarai) and Khumaltar, Lalitpur (mid hill). At Nawalpur, epidemics of the disease was recorded for
both seasons. Weather conditions like humidity, temperature and frequent rainfall played key role
for the epidemics. In experimental fields, the disease appeared first in mid-December when the
relative humidity was more than 80% with maximum temperature ranging between 18-250C and minimum
between 10-140C. At Khumaltar, incidence of the disease was low in both seasons due to low average
temperature from December to February. Among cultivars, Krishna and Pusabold were less susceptible
than Varuna. Both mancozeb and iprodione had effectively reduced disease in the sprayed plots and
increased seed yield by 48% and 130% respectively. The correlation between disease severity and
yield, and yield components was negative and highly significant. Average yield loss was estimated
to be in the range of 32 to 57%. Seed infection was also significantly higher in non sprayed
treatment than sprayed one. The disease showed a negative effect on oil content causing losses on
oil between 4.2 to 4.5%.Link for e-copy: http://elibrary.narc.gov.np/?r=63 OCCURRENCE AND DISTRIBUTION OF ALTERNARIA SPECIES IN SEEDS OF RAPESEED-MUSTARD IN NEPAL / Shrestha, S.K. in Nepal Agriculture Research Journal, Vol.2, No.1 (1998)
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Title : OCCURRENCE AND DISTRIBUTION OF ALTERNARIA SPECIES IN SEEDS OF RAPESEED-MUSTARD IN NEPAL Material Type: printed text Authors: Shrestha, S.K., Author ; Lisa Munk, Author Publication Date: 1998 Article on page: 69-74 p. Languages : English (eng) Keywords: Alternaria brassicae, A.brassicicola,Rapeseed-mustard Link for e-copy: http://elibrary.narc.gov.np/?r=1173
in Nepal Agriculture Research Journal > Vol.2, No.1 (1998) . - 69-74 p.[article] OCCURRENCE AND DISTRIBUTION OF ALTERNARIA SPECIES IN SEEDS OF RAPESEED-MUSTARD IN NEPAL [printed text] / Shrestha, S.K., Author ; Lisa Munk, Author . - 1998 . - 69-74 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol.2, No.1 (1998) . - 69-74 p.
Keywords: Alternaria brassicae, A.brassicicola,Rapeseed-mustard Link for e-copy: http://elibrary.narc.gov.np/?r=1173 Effect of Sowing Time on Incidence and Severity of Major Diseases of Rapeseed-Mustard / Sharma, B.P. in Nepal Agriculture Research Journal, Vol.1, No. 1 (1997)
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Title : Effect of Sowing Time on Incidence and Severity of Major Diseases of Rapeseed-Mustard Material Type: printed text Authors: Sharma, B.P., Author Publication Date: 1997 Article on page: 43-48 p. Languages : English (eng) Keywords: Alternaria blight, downey mildew, Mustard diseases, powdery white rust. Abstract: A field experiment was conducted during 1992-1994 to evaluate the effect of different dates of sowing on incidence and severity of the major diseases of rapeseed-mustard (Brassica compastris, var. toria) under rainfed condition of Nawalpur, Sarlahi. A toria variety 'Vikas' was sown in 10 different dates starting from Sept. 5 to Dec. 5 at 10 day intervals. The mustard sown on 25 Sept. and 5 Oct. showed low severity (13-22%) of Alternaria blight (Alternaria brassicae), complete escape of downy mildew (Peronospora parasitica) and powdery mildew, (Erysiphe cruciferarum) and partial escape of white rust (Albugo candida). Seed yields 703 and 804 kg/ha obtained form those two dates were found significantly higher than those obtained from other seeding dates. Incidences and severities of diseases increased gradually in successive sowing dates.
Link for e-copy: http://elibrary.narc.gov.np/?r=1833
in Nepal Agriculture Research Journal > Vol.1, No. 1 (1997) . - 43-48 p.[article] Effect of Sowing Time on Incidence and Severity of Major Diseases of Rapeseed-Mustard [printed text] / Sharma, B.P., Author . - 1997 . - 43-48 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol.1, No. 1 (1997) . - 43-48 p.
Keywords: Alternaria blight, downey mildew, Mustard diseases, powdery white rust. Abstract: A field experiment was conducted during 1992-1994 to evaluate the effect of different dates of sowing on incidence and severity of the major diseases of rapeseed-mustard (Brassica compastris, var. toria) under rainfed condition of Nawalpur, Sarlahi. A toria variety 'Vikas' was sown in 10 different dates starting from Sept. 5 to Dec. 5 at 10 day intervals. The mustard sown on 25 Sept. and 5 Oct. showed low severity (13-22%) of Alternaria blight (Alternaria brassicae), complete escape of downy mildew (Peronospora parasitica) and powdery mildew, (Erysiphe cruciferarum) and partial escape of white rust (Albugo candida). Seed yields 703 and 804 kg/ha obtained form those two dates were found significantly higher than those obtained from other seeding dates. Incidences and severities of diseases increased gradually in successive sowing dates.
Link for e-copy: http://elibrary.narc.gov.np/?r=1833 Management of Leaf Blight of Garlic with Fungicides in Central Tarai of Nepal / Prem C.P. Chaurasia in Nepal Agriculture Research Journal, Vol. 8 (2007)
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Title : Management of Leaf Blight of Garlic with Fungicides in Central Tarai of Nepal Material Type: printed text Authors: Prem C.P. Chaurasia, Author ; Jang B. Prasad, Author ; Anandi Mandal, Author Publication Date: 2007 Article on page: 63-66 p Languages : English (eng) Keywords: Alternaria porri, disease, percentage disease intensity, purple blotch Abstract: Management of purple blotch in garlic was carried out in 2005/06 and 2006/07 at
horticultural farm of Regional Agricultural Research Station, Parwanipur in Complete
Randomized Block Design with three replications. First year’s results indicated insignificant
effect of fungicides on Percentage Disease Intensity (PDI) of purple blotch disease of garlic
as number of sprays used seemed to be inadequate. Second year’s result revealed that two
sprays of Bavistin @ 0.2% had lowest PDI value but at par to other different number of
sprays of different fungicides except no spray of fungicide. Bulb yield was highest in two
sprays of Dithane M-45 @ 0.3% followed by two sprays of Krinoxyl @ 0.15%, three sprays
of Blitox-50 @ 0.3%. Plant height was insignificant and highest bulb weight was found with
three sprays of Blitox-50 followed by two sprays of Bavistin. Two year’s combined results
indicated that two sprays of Bavistin @ 0.2% had lowest PDI value and all others PDI
values were at par except control. The highest bulb yield was given by two sprays of
Dithane M-45 followed by three sprays of Bavistin. Plant height and bulb weight were
insignificant. It can be recommended that purple blotch disease can be managed by spraying
Bavistin @ 0.2% thrice at 15 days interval or any other tested fungicides to have less
disease, higher bulb yield and more economic return.Link for e-copy: http://elibrary.narc.gov.np/?r=29
in Nepal Agriculture Research Journal > Vol. 8 (2007) . - 63-66 p[article] Management of Leaf Blight of Garlic with Fungicides in Central Tarai of Nepal [printed text] / Prem C.P. Chaurasia, Author ; Jang B. Prasad, Author ; Anandi Mandal, Author . - 2007 . - 63-66 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 8 (2007) . - 63-66 p
Keywords: Alternaria porri, disease, percentage disease intensity, purple blotch Abstract: Management of purple blotch in garlic was carried out in 2005/06 and 2006/07 at
horticultural farm of Regional Agricultural Research Station, Parwanipur in Complete
Randomized Block Design with three replications. First year’s results indicated insignificant
effect of fungicides on Percentage Disease Intensity (PDI) of purple blotch disease of garlic
as number of sprays used seemed to be inadequate. Second year’s result revealed that two
sprays of Bavistin @ 0.2% had lowest PDI value but at par to other different number of
sprays of different fungicides except no spray of fungicide. Bulb yield was highest in two
sprays of Dithane M-45 @ 0.3% followed by two sprays of Krinoxyl @ 0.15%, three sprays
of Blitox-50 @ 0.3%. Plant height was insignificant and highest bulb weight was found with
three sprays of Blitox-50 followed by two sprays of Bavistin. Two year’s combined results
indicated that two sprays of Bavistin @ 0.2% had lowest PDI value and all others PDI
values were at par except control. The highest bulb yield was given by two sprays of
Dithane M-45 followed by three sprays of Bavistin. Plant height and bulb weight were
insignificant. It can be recommended that purple blotch disease can be managed by spraying
Bavistin @ 0.2% thrice at 15 days interval or any other tested fungicides to have less
disease, higher bulb yield and more economic return.Link for e-copy: http://elibrary.narc.gov.np/?r=29