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Effect of nitrogen on development of alternaria blight caused by Alternaria, solani of tomato (Lycopersicon escuientum) in rainy and winter seasons

Indian Agricultural Research Journals

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Title Effect of nitrogen on development of alternaria blight caused by Alternaria, solani of tomato (Lycopersicon escuientum) in rainy and winter seasons
 
Creator SHARMA, J P
KUMAR, S
 
Subject Alternaria solani, tomato,nitrogen, relation with weather factors, Alternaria blight,Lycopersicon esculentum
 
Description Effect of nitrogen application in relations to concomitant weather factors was studied on the severity of the early blight [Alternaria soluni (EII. & Martin Jones & Grout)] disease of tomato (Lycopersicon esculentum Mill nom. Cons) in a lield experiment for 8 growing seasons. The weather factors recorded 10 days preceding the, disease observations showed augmentation in the severity at almost all dosage of N applied (0-250 kg N/ha at 11 levels at an increment of 25 kg/ha). Temperature (maximum, and minimum) and the total precipitation increased the disease severity most signilicanlly both in the rainy and'winter seasons. Mean maximum temperature of 29.65oC. minimum of 22.09oC and the percipitation of 128 mm in ihe rainy season and those of 23.40oC, 8.69oC and 7.16mm, respectively in the winter season favoured the disease-development. Highter relative humidity and the frequency of rain indirectly favoured, the disease-development. The direct role of N levels in increasing the severity was not tbund significant A dose of 150 kg N/ha in the rainy seaSon and 175 kg N/ha in winter season was worked out to be optimum for the Alfisol of Chhotanagpur plateau of Bihar.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-02-13
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/27325
 
Source The Indian Journal of Agricultural Sciences; Vol 68, No 2 (1998)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/27325/12434
 
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