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Influence of biocontrol agents on population density of Aspergillus flavus and kernel infection in groundnut

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Relation http://oar.icrisat.org/1389/
 
Title Influence of biocontrol agents on population density of Aspergillus flavus and kernel infection in groundnut
 
Creator Thakur, R P
Rao, V P
Subramanyam, K
 
Subject Groundnut
 
Description Aflatoxin contamination of groundnut, caused by A. flavus (Af) group of fungi, is a major problem in the rainfed agriculture in the semi-arid tropics. Biological control could be one of the components of integrated management to reduce pre-harvest kernel infection in the field. Six Trichoderma (T. harzianum (Th 13), T. longibrachiatum (Tl 16), T. viride (Tv 17), T. viride (Tv 20), T. harzianum (Th 23) and Trichoderma sp. (T 28)) and three Pseudomonas fluorescens (Pf 2, Pf 76 and Pf 153) strains that were identified as highly antagonistic to Af 11-4 (a highly toxigenic strain) in vitro were evaluated in the field (2 at Patancheru (rainy and postrainy seasons), and one at Anantapur (rainy season), Andhra Pradesh, India, during 2000-01) to determine their biological control potential. The antagonists were applied as seed dressing and soil application at flowering in Af-sick plots. All the antagonists significantly reduced seed infection in all three field experiments. Tv 17, Tv 23, Th 23 and Pf 2 isolates provided greater protection to seed infection by Af 11-4 than others. The reduced seed contamination occurred due to significant reduction in Af population in the rhizosphere of groundnut.
 
Date 2003
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/1389/1/IndPhytopath56_4_408_412_2003.pdf
Thakur, R P and Rao, V P and Subramanyam, K (2003) Influence of biocontrol agents on population density of Aspergillus flavus and kernel infection in groundnut. Indian Phytopathology, 56 (4). pp. 408-412.