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Effects of Host Resistance, Temperature, and Duration of Wetness of Leaf Blight Development of Grain Sorghum

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Relation http://oar.icrisat.org/4845/
http://www.indianjournals.com/ijor.aspx?target=ijor:ijpp1&volume=23&issue=2&article=007
 
Title Effects of Host Resistance, Temperature, and Duration of Wetness of Leaf Blight Development of Grain Sorghum
 
Creator Karunakar, R I
Pande, S
Thakur, R P
 
Subject Sorghum
 
Description The effects of post-inoculation temperatures and periods of leaf wetness of leaf blight (Exserohilum turcicum (Pass.) Leonard and Suggs) development were studied in three sorghum genotypes (IS 3443C-40, ICSV 1, and 296B or Local FSRP) having varying levels of blight resistance. In two different experiments, pot-grown plants of these genotypes were spray-inoculated and subjected separately to i) six temperature regimes (10,15,20,25,30 and 35°C) for 24h with a 12h photoperiod and high relative humidity (100% RH) and ii) six periods of leaf wetness (RH-100%) of 2,4,6,8,24, and 48 h at 25°C Leaf blight severity (percentage leaf area damaged) was maximum (55%) at 25°C at 24 h of leaf wetness period in the susceptible genotypes Local FSRP and 296B. There was no leaf blight development at 10°C and 35°C and, significnatly, only low blight development (%) up to 8 h of leaf wetness. Implication of these findings in refining leaf blight screening technique is discussed.
 
Publisher Plant Protection Association of India
 
Date 1995
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/4845/1/Effects%20of%20host%20resistance%2C%20temperature%2C%20and%20duration%20of%20wetness%20of%20leaf%20blight%20development%20of%20grain%20sorghum.pdf
Karunakar, R I and Pande, S and Thakur, R P (1995) Effects of Host Resistance, Temperature, and Duration of Wetness of Leaf Blight Development of Grain Sorghum. Indian Journal of Plant Protection, 23 (2). pp. 146-151. ISSN 0253-4355