Role of strains, genotypes and seasons on the progression of mango bacterial canker disease.
Kishun R., Rajan S.
Author Affiliation: Central Institute for Subtropical Horticulture, Rehmankhera, P.O. Kakori, Lucknow 227 107, India.
Indian Phytopathology 55 : 200-202
Abstract : Experiments were conducted in Lucknow, Uttar Pradesh, India, during summer, winter and monsoon seasons [date not given] to investigate the effect of strain, genotype and season on progression of mango bacterial canker disease (MBCD) incited by Xanthomonas campestris pv. mangiferaeindicae (Xcmi). Twenty-five strains of MBCD were isolated from diseases samples collected from different agroclimatic zones/mango genotypes of the country. These strains tested separately by inoculation (108 cfu/ml) on leaf lamina of mango genotypes Amrapali, Bombay Green, Chausa, Dashehari, Fajri, Langra, Malihabad Safeda, Mallika and Ramkela. Data on lesion size was recorded at 5 days interval up to one month and progression of MBCD in the form of relative area under disease progress curve was calculated. It has been found that the strains were interacting significantly with the environment, which might be due to the difference in their geographical adaptation/origin, indicating the genotypic difference among Xcmi strains. This also suggests the presence of disease producing Xcmi strains under less favourable environmental conditions.