A Review on Mango Gummosis Incited by Lasiodiplodia theobromae

Abstract

Mango gummosis caused by Lasiodiplodia theobromae (Pat.) Griffon & Moube [synonym: Botryodiplodia theobromae] is a serious disease in India especially on popular varieties of mango during monsoon and post-monsoon periods. Severe infection with pathogen causes up to 30- 100 % yield losses in mango. Gummosis infected orchards shows abundant gum secretion from branches, stem and main trunk and also Vascular discoloration. In severe cases infected mango trees may die. The pathogen produces grey-brown to black colonies with dense aerial mycelia on the PDA medium. Pycnidia were separate or aggregated, dark brown, thick or thin-walled. Conidiophores were hyaline, cylindrical to sub-obpyriform, with oblong, straight and hyaline single celled conidia andinitially. Gradually the conidia became dark brown and produced one septum with longitudinal striations. The pathogen has wide host range so difficult to manage the disease at field level. There are sevral Management strategies for mango gummosis like resistant or tolerant varieties, effective fungicides, botanicals and effective biological control agents role in disease management. This review attempts to summarize the Knowledge on mango gummosis, symptomotology, pathogen host range, morphological and cultural characters of Lasiodiplodia and management of the disease.