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HOST RANGE AND CROSS INFECTIVITY STUDIES OF CORYNESPORA CASSIICOLA

Indian Agricultural Research Journals

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Title HOST RANGE AND CROSS INFECTIVITY STUDIES OF CORYNESPORA CASSIICOLA
 
Creator D. PRASANTH KUMAR
S.L. BHATTIPROLU
G. BINDU MADHAVI
CH. CHIRANJEEVI
 
Subject Blackgram
Corynespora cassiicola
Cotton
Cross infectivity
 
Description Corynespora infecting cotton has wide host range and due to its importance in blackgram earlier in Andhra Pradesh an investigation was carried to test the ability of the pathogen, Corynespora cassiicola isolated from cotton could cross infect blackgram crop and vice versa. Isolates were collected from the major cotton and blackgram (B-1 to B-6) growing areas viz., Guntur, Prakasam and Krishna districts. Experimental design was completely randomized in a factorial arrangement of 12x3x2 (12 isolates, 3 areas and 2 hosts) and replicated thrice. Cross inoculation experiments demonstrated variation in the level of latent period, infectivity and per cent disease index (PDI) among C. cassiicola isolates. The incubation period was 4 to 7 days in cotton for cotton isolates with highest PDI (32.94) in C-5 and lowest in C-2 isolates (20.77 PDI). It was 3 and 6 days in blackgram with blackgram isolates; the highest PDI (38.05) was recorded in B-1 and lowest in B-6 (16.06). However, C6 (8.28) and B5 (11.21) displayed the highest virulenceindex, respectively. Cross infectivity studies registered the highest PDI with C3 isolate (24.82) and the lowest in C5 isolate (12.48) in blackgram; whereas PDI was highest with B2 isolate (15.90) and B6 isolate (5.59) in cotton. In terms of virulence, C1 (4.50) and B4 (2.44) exhibited the highest virulence index, respectively.
 
Publisher Acharya N. G. Ranga Agricultural University, Guntur
 
Date 2024-06-30
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/TJRA/article/view/160063
10.58537/jorangrau.2024.52.2.01
 
Source The Journal of Research ANGRAU; Vol. 52 No. 2 (2024): The Journal of Research ANGRAU, Vol. LII No. (2), pp.1-160, April - June, 2024; 05-16
0970-0226
10.58537/jorangrau.2024.52.2
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/TJRA/article/view/160063/57249
 
Rights https://creativecommons.org/licenses/by-nc-sa/4.0