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Occurrence, severity and association of fungal pathogen, Botrydiplodia theobromae with sudden death or decline of tree bean (Parkia timoriana, (DC.) Merr) in North Eastern India

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Title Occurrence, severity and association of fungal pathogen, Botrydiplodia theobromae with sudden death or decline of tree bean (Parkia timoriana, (DC.) Merr) in North Eastern India
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Creator A. Ratankumar Singh
Sudip Kumar Dutta
S B Singh
T Boopathi
S Lungmuana
S Saha
Vishambhar Dayal
Romila Akoijam
S K Sharma
N Hemanta Singh
 
Subject Botrydiplodia theobromae
north eastern India
Parkia timoriana
sudden death or decline disease
tree bean
 
Description Not Available
Tree bean, Parkia timoriana is one of the most
important perennial tree legume vegetable crops in
north eastern region (NER) of India. Recently, sudden
death or decline is emerging as a major constraint in
the production of tree bean. The prevalence, intensity
and etiology of this disease have not been extensively
studied. The present work was aimed at studying the
symptomology, severity and etiology of sudden death
or decline of tree bean in the north eastern region of
India. Typical symptoms of tree bean decline were
initiated with wilting of half portion of the tree, excessive shedding of leaves, gradual drying up leading to
death, and secondary infestation by insects on dead
trees. The highest disease severity of 68.5% was observed in warmer regions like Kolasib, Mizoram. During survey, small bark borer was recorded in all
districts and levels of infestation rate (holes/ft2 of log)
reached maximum up to 25.49 in Hnanthial of Lunglei
district. Young trees in the range 1–10 years with
57.32% (917 trees) of total trees (1600) infected were
most susceptible to the disease compared to 12.58%
(201 trees) infection in old trees in the range 21–30
years. The frequently associated pathogen with sudden death or decline of tree bean was identified as
Botrydiplodia theobromae at the Indian Type Culture
Collection, ICAR-IARI, New Delhi. It was the most
aggressive species and proven to be pathogenic to tree
bean following artificial inoculation.
Not Available
 
Date 2021-09-27T09:43:40Z
2021-09-27T09:43:40Z
2018-09-25
 
Type Research Paper
 
Identifier Singh, A. R., Dutta, S. K., Singh, S. B., Boopathi, T., Lungmuana, S., Saha, S., ... & Singh, N. H. (2018). Occurrence, severity and association of fungal pathogen, Botrydiplodia theobromae with sudden death or decline of tree bean (Parkia timoriana,(DC.) Merr) in North Eastern India. Current Science, 115(6), 1133.
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http://krishi.icar.gov.in/jspui/handle/123456789/64733
 
Language English
 
Relation Not Available;
 
Publisher Not Available