Authors : S. A. Karande, A. G. Tekale, A. M. Kadam and R. R. Girange
Page Nos : 44-50
Description :
Chilli (Capsicum annuum L.), is an important solanaceous vegetable-cum-spice crop. Chillies are widely used as a spices, condiments, culinary, supplements, medicines, and vegetables and for flavoring many vegetarian and non-vegetarian food products. Chilli requires hot and humid conditions for growth and development and its cultivation is mainly confined to the tropical regions of the world. Chilli crop is suffered from many fungal, bacterial and viral diseases. Therefore, present in vitro study was conducted to assess Efficacy of Fungicides against Sclerotium rolfsii of Chilli. Infected chilli plants showing typical root rot symptoms were collected from the fields and isolated on PDA. Pathogenicity of the test fungi were proved by sick soil (S. rolfsii) method in earthen pots, under screen house conditions. Seven systemic (each @500 and 1000 ppm) were evaluated in vitro against the test fungi S. rolfsii, by applying Poisoned food technique (Nene and Thapliyal, 1993) and using potato dextrose agar (PDA) as basal culture medium. Observations on radial mycelial / growth colony diameter (mm) of the test fungi at an interval of 24 hrs of incubation were recorded and continued up to seven days or till the untreated PDA plates were covered fully with mycelial growth of the test fungi. All the seven systemic fungicides evaluated in vitro (each @ 500 and 1000 ppm), were found fungistatic against S. rolfsii and significantly inhibited its mycelial growth over untreated control. However, highest mycelial growth inhibition recorded with Propiconazole 25% EC, Difenoconazole 25% EC, Tebuconazole 25.9 % EC and Hexaconazole 5% EC (each @ 500 and 1000 ppm) resulted with cent per cent (100 %) mycelial growth inhibition, followed by Azoxystrobin 23% SC (55.00 and 66.11 %) whereas, Thiophanate methyl 70% WP and Carbendazim 50% WP were ineffective, respectively @ 500 and 1000 ppm.
