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In vitro Antagonism of Three Trichoderma spp. against Sclerotium rolfsii Sace., a Collar-rot Pathogen in Elephant Foot Yam

Authors :
Srinivasulu, B.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Krishna Kumar, K. V.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Aruna, K.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Krisha Prasadji, J.; (Pl. Pathology), ARS (ANGRAU), Korvuru, 534350, West Godavari
Rao, D. V. R.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Srinivasulu, B.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Krishna Kumar, K. V.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Aruna, K.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Krisha Prasadji, J.; (Pl. Pathology), ARS (ANGRAU), Korvuru, 534350, West Godavari
Rao, D. V. R.; Agricultural Research Station, Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh
Source :
Journal of Biological Control; Volume 19, Issue 2, December, 2005; 167-171; 2230-7281; 0971-930X
Publication Year :
2008

Abstract

The present investigation focuses on the screening of potential biocontrol agents against the collar-rot pathogen, Sclerotium rolfsii Sacc. on elephant foot yam, an intercrop of coconut in Andhra Pradesh. Among the three antagonists screened, Trichoderma viride Pers. Fr., T. harzianum Rifai and T. hamatum (Bon.) Bain, isolated and screened, T. hamatum inhibited the radial growth of S. rolfsii to an extent of 52.22 per cent followed by T. viride (44.11%) and T. harzianum (38.87%). All the three Trichoderma spp. were very effective in producing volatile and non-volatile metabolites that were suppressive to 5. rolfsii. Viability tests on sclerotia of S. rolfsii parasitized by Trichoderma spp. revealed complete colonization and replacement of sclerotial contents by 7th day of parasitisation in case of T. hamatum and by 10th day in case the of T. viride and T. harzianum.

Details

Database :
OAIster
Journal :
Journal of Biological Control; Volume 19, Issue 2, December, 2005; 167-171; 2230-7281; 0971-930X
Notes :
Agricultural Science, application/pdf, English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1266257239
Document Type :
Electronic Resource

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