PREVALENCE OF LOTKON (Baccaurea ramiflora) DISEASES IN NARSINGDI DISTRICT OF BANGLADESH

Abstract

A field survey was conducted during 10 th April to 20 th July 2016 to study the disease incidence and severity of lotkon (Baccaurea ramiflora) in Narsingdi district of Bangladesh. In the survey, two diseases namely Anthracnose and Scab were identified and pathogen were isolated as Colletotrichum gloeosporioides and Venturia inaequalis respectively and their incidence and severity were recorded. The highest percentage of disease incidence was recorded in Belabo Upazila (16.83% for anthracnose and 14.33% for scab) followed by Raipura Upazila (15.17% for anthracnose and 13.31% for scab) the lowest incidence was observed in Shibpur Upazila (11.33% for anthracnose and 10.33% for scab). In the survey of leaf blight was observed but pathogen could not be isolated and confirmed. The maximum percentage of disease incidence was found in Raipura Upazila (20.5%) followed by Belabo Upazila (19.33%) and the lowest was observed in the Shibpur Upazila (17.67%). The maximum disease severity was observed in the Raipura Upazila (17.26% for anthracnose,19.69% for scab and 21.70% for blight) followed by Shibpur Upazila (13.50% for anthracnose,18.41% for scab and 17.71% for blight) and the lowest was observed in the Belabo Upazila (12.96% for anthracnose,15.86% for scab and 16.39% for blight) of all the diseases. Significant disease infestation was significantly recorded in all the three Upazilas in Narsingdi district of Bangladesh.