Journal of Biological Control

Open Access Open Access  Restricted Access Subscription Access

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


Affiliations
1 Agricultural Research Station Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh, India
2 (Pl. Pathology), ARS (ANGRAU), Korvuru, 534350, West Godavari, India
 

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.

Keywords

Antagonism, Elephant Foot Yam, Sclerotium rolfsii, Trichoderma.
User
Notifications

Abstract Views: 378

PDF Views: 114




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

Abstract Views: 378  |  PDF Views: 114

Authors

B. Srinivasulu
Agricultural Research Station Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh, India
K. V. Krishna Kumar
Agricultural Research Station Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh, India
K. Aruna
Agricultural Research Station Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh, India
J. Krisha Prasadji
(Pl. Pathology), ARS (ANGRAU), Korvuru, 534350, West Godavari, India
D. V. R. Rao
Agricultural Research Station Acharya N. G Ranga Agricultural University, Ambajipeta, 533 214, Andhra Pradesh, India

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.

Keywords


Antagonism, Elephant Foot Yam, Sclerotium rolfsii, Trichoderma.