Year: 2019 | Month: June | Volume 12 | Issue 2
Pathogenic Variability of Ralstonia solanacearum Causing Bacterial Wilt of Brinjal in Red and Lateritic Agro-climatic Zone of West Bengal
DOI:10.30954/0974-1712.06.2019.11
Abstract:
Brinjal (Solanum melongena L.) is one of the most economically important solanaceous vegetables in India. The crop is suffering severely from bacterial wilt disease caused by Ralstonia solanacearum (Smith) Yabuuchi et al. that considerably limits its cultivation and production. Symptoms of the disease in brinjal appeared usually at flowering and fruiting stage of the crop growth. Drooping of the top most leaves followed by total or partial wilting was common. Infected plants showed vascular browning. Variability of the pathogen was recorded in respect to their aggressiveness and pathogenicity. Presence of more aggressive isolates in Bahadurpur (BAHRS5) and Halsidanga (HALRS6) and moderately aggressive isolates in Mukundapur (MUKRS2) and Gorabari (GORRS3) may be due to higher cropping intensity of solanaceous vegetables. Stem incision appeared superior to the stem injection method for pathogenicity test through cross inoculation studies. No host specificity was observed among the isolates of the pathogen from brinjal, tomato and Amaranthus spinosus revealed race 1 while host specificity was recorded in case of the pathogen isolated from Costus speciosus revealed race 4.
© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Print This Article Email This Article to Your Friend
