Abstract

At this time the whole world food security is considered, so the study of a highly valuable Jackfruit trees showing stem Anthracnose and dieback diseases is a very urgent problem. A survey was done from summer months of 2020 to the summer months of 2022 in Jack fruit trees growing areas of Bengaluru like Arrupe Nivas and Ashirvad campus to identify different fungal diseases and pathogens causing that disease in it. Different stem and leaf samples were collected from study areas for isolation of fungal pathogens by the latest research methods like Blotter and Culture Potato Dextrose Agar (PDA) medium. Arrupe Nivas, jack fruit leaf and stem samples shown the Colletotrichum gloeosporioides (Penz.) Sacc., Lasiodiplodia theobromae (Pat.) Griffon & Maubl., Aspergillus niger Tieghem and Trichoderma sp; whereas Ashirvad campus, Jack fruit leaf and stem samples showed the C. gloeosporioides, Fusarium oxysporun Schlecht. and Epicoccum nigrum Link. The frequently isolated fungal pathogens from Arrupe Nivas jack fruit trees were C. gloeosporioides and L theobromae, whereas the frequently isolated fungal pathogen from Ashirvad campus jackfruit trees was C. gloeosporioides. The pathogenicity test confirms that the anthracnose and dieback diseases are responsible for the death of Jackfruit trees in Arrupe Nivas and dieback disease in Ashirvad campus. The similar type of diseases symptoms was also observed in the Jackfruit growing areas of Bengaluru, Karnataka, India. For the first time the Anthracnose in stem and dieback in trees of jackfruit growing areas of Bengaluru of Karnataka was reported.

Keywords: Anthracnose; Dieback disease; Jack fruit; Colletotrichum gloeosporioides; Lasiodiplodia theobromae