Fungal diseases of three aromatic rice (<i>Oryza sativa </i>L.)

Abstract

Seeds of three aromatic rice (Oryza sativa L.) var. Kalijira, Kataribhog and BR 34 Jira dhan were tested by Blotter method for identifying their seed borne fungi. Fungi associated with seeds were Aspergillus niger, Apergillus sp., Carvularia sp., Cladosporium sp., Colletotrichum sp., Fusarium sp., Pyrenochaeta oryzae and Sarocladium oryzae. Infected samples were collected from the field starting from maximum tillering stage to grain filling stage of plant growth. After maximum tillering stage three fungal diseases were recorded on the stems and sheaths. Sheath rot was recorded on all the three rice varieties, stem rot was recorded on Kalijira and sheath blotch was recorded on Kataribhog. The pathogens of sheath rot, Sarocladium oryzae, sheath blotch, Pyrenochaeta oryzae and stem rot, Sclerotium oryzae were frequently associated with the respective samples. This is the first report of disease on aromatic rice plant for Bangladesh.

In vitro evaluation of fungicides and some plant extracts against rice sheath rot pathogen Sarocladium oryzae

“…Thirty samples with sheath rot symptom was examined to detect the causal agent. Pathogen was isolated from the infected sheaths and grains following Blotter method and Tissue Planting method on PDA medium (Shamsi et al 2010). Microscopic observation of the fungus was recorded on cover slip culture of the fungus.…”

“…Sheath rot disease has been spreading among the newly released varieties (Shamsi et al 2010). Present research was undertaken to screen suitable fungicides and plant extracts to control the sheath rot pathogen S. oryzae in vitro.…”

Morpho-anatomical investigations of three critically endangered endemic species

“…The collected seed samples were kept in polythene bag with airtight container in two conditions, one in room temperature (25°C) and other in refrigerator at 4ºC temperature for subsequent use. Fungi associated with cotton seeds were isolated following 'Blotter' and 'Tissue Planting' methods (Shamsi et al 2010). The experiment was conducted in the laboratory of Mycology and Plant Pathology, Department of Botany, University of Dhaka, Bangladesh.…”

Pathogenic potentiality of fungi isolated from seeds of three hill cotton varieties (Gossypium arboreum L.)

“…Fungi associated with cotton seeds were isolated following 'Blotter' and 'Tissue Planting' method (16) . Identification of the isolated fungi was determined following standard literatures (17)(18)(19)(20)(21)(22)(23) .…”