Vol. 10, Issue 6 (2021)

Author(s):
Ashwini G Patil, KT Apet and RC Agale

Abstract:
Mango bacterial leaf spot, (X. campestris pv. Mangiferaeindicae) is one of the most devastating diseases throughout the world, affecting all kinds of commercial mango varieties. Pathogenic variability among the eight isolates of Xanthomonas campestris pv. Mangiferaeindicae collected from different agro climatic zones of Marathwada region was detected by two separate methods viz., attached leaf assay and detached leaf assay. Eight different isolates collected from Marathwada region were subjected to pathogenic variability in attached leaf assay under screen house condition. Entire eight test isolates of X. campestris pv. Mangiferaeindicae found pathogenic and caused bacterial leaf spot in mango (Kesar). Average incubation period (days) varied from 12.33 (AR) to 14 (MR). In detached leaf technique under controlled lab conditions, leaves of total six varieties of mango viz., Local, Kesar, Dasheri, Neelam, Amrapali and Alphonso were used and observation were recorded on incubation period and symptom type. The entire eight test isolates of X. campestris pv. Mangiferaeindicae found pathogenic and caused bacterial leaf spot in leaves of all mango cultivars However, Local and Kesar cultivar showed moderate and more symptoms of leaf spot, while rest all cultivars viz., Dasheri, Neelam, Amrapali and Alphanso showed less symptoms of leaf spot.