An attempt was
different locations of Bangladesh. In this study, comparative season wise survey was conducted during
2010-2015. Disease incidence % of six commercially cultivated medicinal plants viz. Ashwagandha
(Withania somnifera L.) Dunal, Gritakanchon (Aloe indica L.), Kalomegh {Andrographispeniculata Nees),
Tulsi {Qcimwn sanctum L.), Basok (Adhatoda vasica Nees) and Shotomoly {Asparagus racemosus L.) was
recorded. Common diseases on all the six plants were recorded which included root rot and leaf blight in
Ashwagandha, leafspots and collar rot in Gritakanchon, Powdery mildew and root rot in Tulsi, leafblight
and collar rot in Kalomegh, wilting and die-back in Basok, tuber rot and stem rot in Shotomoly. The causal
organisms were identified as Fusarium equiseti (Corda.) Sacc., Alternaria altemata (Fries) Keissler,
Cochliobolus lunatus (Nelson & Hassig), Rhizopus stolonifer (Ehrenberg ex.
Fusarium oxysporiiun (Schlecht), Colletotrichum sp. respectively. The study revealed that most of the
incidences of the diseases were found in monsoon than pre-monsoon comparatively. Moderate to severe
damage by the diseases were observed in all the six medicinal plant highest (91.45%) disease incidence was
recorded in Ashwagandha for root rot disease and lowest (68.05%) disease incidence was recorded in
Shotomoly for the same disease.