The first report of Pestalotiopsis sp. causing crown rot disease on strawberry (Fragaria X ananassa Duch.) in Bangladesh and evaluation of fungicide activity
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The first report of Pestalotiopsis sp. causing crown rot disease on strawberry (Fragaria X ananassa Duch.) in Bangladesh and evaluation of fungicide activity
Abstract
This study was conducted to identify the crown rot disease in strawberry caused by an uncommon fungus. However the study also focused to evaluate efficacy of plant extracts and chemical fungicides against this fungus. Results from isolating 200 samples of infected plant parts collected from 15 main strawberry cultivating areas in Rajshahi, Bangladesh. Based on morphological and cultural characteristics the Pestalotiopsis sp. was found as fungal pathogen against strawberry and Koch’s methodology confirmed it. Five different concentrations (50, 100, 250, 500 and 1000 ppm) of plant extracts (Neem, Tulsi, Bottlebrush, Arjun and Aloe vera) and commercial fungicides (Bavistin, Tilt, Hayconazole, Score, Rovral, Antracol, Dithane, Ridomil, Folicur, Cupravit, Secure, Thiovit and Sulcox) were used for efficacy study against Pestalotiopsis sp. in both in vitro and field condition. The percent inhibition of radial growth of the fungus was increased with the increasing concentrations of fungicide. Bavistin (1000 ppm) showed 100% inhibition of growth of this fungus in in vitro condition and in field condition. Bavistin treated plants showed only 21.5% disease incidence, where control was 85%. Number of fruits/plant was 10.88±0.23, fruit weight/plant was 148.56±0.81 (g) whereas in control these were 5.33±0.23 and 63.88±0.26 respectively. This is the first report on the association of Pestalotiopsis sp. causing crown rot disease of strawberries in Bangladesh.
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Tanziman Ara, Sadia Monzur, Mumtaz Ali Saand, Rafiul Islam, Shahidul Alam, Monzur Hossain, 2017. The first report of Pestalotiopsis sp. causing crown rot disease on strawberry (Fragaria X ananassa Duch.) in Bangladesh and evaluation of fungicide activity. Int. J. Biosci., 11(4), 350-358.
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