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Bioefficacy of formulations of different allelofractions of sesame (Sesamum indicum) against purple nutsedge (Cyprus rotundus)

Indian Agricultural Research Journals

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Title Bioefficacy of formulations of different allelofractions of sesame (Sesamum indicum) against purple nutsedge (Cyprus rotundus)
 
Creator KUMAR, LALIT
VARSHNEY, JAY G
BHATTACHARYA, A
 
Subject Allelopathy; Allelocompounds; Crop protection;Cyprus rotundus; Root exudates; Sesamum indicum
 
Description An experiment was conducted during 2005–07 at Kanpur, Uttar Pradesh to find out the effect of different polarity of allelofractions, viz F, E, D, C, B and A of sesame (Sesamum indicum L.) root exudates on the vegetative growth and root and tuber development of purple nutsedge (Cyprus rotundus L.), emulsifiable concentrate and emulsive water formulations developed from the extracted allelofractions not only revealed a grave impact on the vegetative growth of treated plants but also caused severe reduction in root biomass and their tuber-forming tendencies. Emulsifiable concentrate formulations developed from completely non-polar fractions, viz F and E caused nearly 90% reduction, compared to control in both of the parameters, i e the total biomass as well as the shoot biomass at 90 μg/g concentrations. At the same concentration, compared to control both the emulsifiable concentrates were also observed quite effective in reducing up to 80–90% and 95–97% in the root biomass and their tuber-forming tendencies, respectively. Emulsifiable concentrate (fraction D) and Emulsive water (fraction B and C) formulations exhibited nearly 60–70% reduction in total biomass and about 70– 75% reduction in root biomass and tuber-forming tendencies of treated purple nutsedge plants at 180 μg/g concentrations. However, the emulsive water formulation developed from the completely polar fraction (A) caused around 50–60% reduction in the entire observed root and shoot parameters that too at very high concentrations, i e 270 μg/g.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-01-05
 
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/2604
 
Source The Indian Journal of Agricultural Sciences; Vol 81, No 1 (2011)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/2604/725
 
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