The experiment was carried out during the year 2025 at the Plant Pathology Department and Seed Pathology Center, Bangladesh Agricultural University, Mymensingh. For surveying the market diseases of potato in shop cum storage, 10 shops from three selected markets of each city/town viz. New markets kacha Bazar, kawran Bazar and Uttara Kacha Bazar of Dhaka City; Shaheb Bazar Master para, Shalbagan Kacha Bazar and New Market Kacha Bazar of Rajshahi as well as Mesua bazar, K. R Market and Sesh moor bazar of Mymensingh were selected. Sample was collected in every week throughout the experimental period. Pathogens were isolated by tissue planting method on to PDA (Potato Dextrose Agar) and NA media. In Dhaka city the loss estimated of potato by 5.58, 4.96 and 4.55% in the month of July, August and September, respectively. In Rajshahi city the survey revealed the loss estimated of potato by 5.85, 5.58 and 5.28%, respectively in the month of July, August and September. The loss estimated by 5.84, 5.54 and 5.25%, respectively in the month of July, August and September at Mymensingh town.

Key words: Potato, market disease, Dhaka city, Rajshahi and Mymensingh.

Introduction

Potato (Solanum tuberosum L.) is a tuber crop belonging to the family Solanacae. It is the most important source of human food and ranked as the fifth major crop of the world (Hooker, 1983). The area and yield of potato vary from year to year in Bangladesh. However; recent reports indicated that 4161 million tons of potatoes were produced from 744 thousand hectares of land in 2005-2006 (BBS, 2006). Potato crop has many hazards in the field as well as in the storage and market, of which soft rot, dry rot, potato scab, potato gangrene, hollow heart are important. A recent report indicated that 0.187 million tons of potato were lost in Bangladesh due to diseases (Anonymous, 2006). In Bangladesh considerable work have been done by BAU and BARI Scientist on different aspects of diseases of potato but no systematic work has been done on the market diseases of this crop, except recording the occurrence of a few diseases and only a limited research work has been done. Therefore, the present work was carried out to determine the diseases occurrence of potatoes during storage period in some city/town markets (Dhaka, Rajshahi and Mymensingh) of Bangladesh.

Materials and Methods
The experiment was carried out during the year 2025 at the Plant Pathology Department and Seed Pathology Center, Bangladesh Agricultural University, Mymensingh. For surveying the market diseases of potato in shop cum storage, 10 shops from three selected markets of each city/town viz. New markets kacha Bazar, kawran Bazar and Uttara Kacha Bazar of Dhaka City; Shaheb Bazar Master para, Shalbagan Kacha Bazar and New Market Kacha Bazar of Rajshahi as well as Mesua bazar, K. R Market and Sesh moor bazar of Mymensingh were selected. In each shop, random sampling was made in four bags per cultivar. The bags were opened and the diseases tubers (soft rot, dry rot and common scab) of each bag were separated from the healthy ones. The diseased tubers form those bags were weighed and these amounts was divided by the total amount of potato in the four (4) bags and multiplied by 100; so as find out the percentage of