STATUS OF POST HARVEST DISEASES OF PAPAYA AND JUJUBE IN DHAKA CITY

Abstract

The present experiment was conducted during the period from November, 2009 to March, 2010 to find out the status of post harvest diseases of papaya and jujube fruits in Dhaka city. Consequently three experiments were conducted for identification of post harvest diseases, causal organism and isolation of causal organism from diseased of papaya and jujube. The survey was conducted in the wholesale markets of Dhaka in the area of Kawran Bazar, Zatrabari and Mazar Road Mirpur-l. Papaya and jujube were collected from different division in Dhaka wholesale market. In case of papaya the highest percentage of papaya fruits (32.33%) was collected from Dhaka division. For jujube the highest percentage (37.22%) was collected from Dhaka division. In case of papaya, in an average the highest incidence (28.13%) was recorded in the month of March, 2010 whereas the lowest incidence (15.29%) was recorded in the month of November, 2009 and the highest severity (28.37%) was recorded in the month of March, 2010 whereas the lowest severity (15.87%) was recorded in the month of November, 2009. In case of jujube, the highest incidence (47.18%) was recorded in the month of March, 2010 whereas the lowest incidence (21.83%) was recorded in the month of January, 2010 and the highest severity (53.46%) was recorded in the month of March, 20]0 while the lowest severity (16.35%) in the month of January, 20]0. In case of tissue infection in papaya it was found that 100% fruits were infected by C. gloeosporioides, Rhizopus, Fusarium, Stemphylium and Aspergillus pathogen. In case of tissue infection by using block the highest infected tissue (30%) was recorded for C. gloeosporioides and the lowest for Aspergillus (5%) For tissue infection using scrap the highest infected tissue (35%) was recorded for C. gloeosporioides, while the lowest for Aspergillus (6%). In case of control condition it was found that 33% fruit were infected by C. gloeosporioides, Rhizopus, Fusarium, Stemphylium and no infection was recorded for Aspergillus pathogen. In control condition the highest (15%) infected tissue was recorded for Anthracnose, whereas no infection for Aspergillus. And in case of jujube the highest infected fruit was recorded for Phomopsis (90%), whereas the lowest was recorded for Stemphylium (30%). In case of tissue infection using block, the highest infected fruit was recorded for Alternaria (32%), while the lowest was recorded for Rhizopus (10%). In case of tissue . infection using scrap, the highest infected fruit was found for Alternaria (37%), while the lowest was recorded for Rhizopus (15%). In case of control condition no infected fruit and no infected tissues were observed for Phomopsis, Stemphylium, Rhizopus, Anthracnose and Alternaria pathogen.