home news forum careers events suppliers solutions markets expos directories catalogs resources advertise contacts
 
News Page

The news
and
beyond the news
Index of news sources
All Africa Asia/Pacific Europe Latin America Middle East North America
  Topics
  Species
Archives
News archive 1997-2008
 

Potential causes of yellowing and stunting of rice in India


A ProMED-mail post
http://www.promedmail.org
ProMED-mail is a program of the
International Society for Infectious Diseases
http://www.isid.org

Date: Tue 23 Aug 2022 7:02 AM IST
Source: The Indian Express [summ. Mod.DHA, edited]
https://indianexpress.com/article/india/scientists-track-cause-of-mystery-paddy-dwarfing-in-punjab-and-haryana-8105794/


Many farmers in Punjab, Haryana, as well as parts of Uttar Pradesh, and Uttarakhand have been reporting stunting and yellowing of rice plants. The symptoms occur 30-35 days after transplanting or seeding, with between 10 and 40 percent of plants affected.

Preliminary analysis of samples at the Indian Agricultural Research Institute using electron microscopy and PCR (polymerase chain reaction) so far points towards rice grassy stunt virus, but phytoplasmas, root fungi, or nematodes are also still a possibility. A clearer diagnosis is expected after high-throughput sequencing which is currently being carried out.

[Byline: Harish Damodaran, Anju Agnihotri Chaba]

--
Communicated by:
ProMED Rapporteur Mahmoud Orabi

[A range of pathogens including fungi, bacteria, viruses, and nematodes have been reported to affect rice crops in the region. Much of the diagnosis above so far appears to be speculation since the possible causes listed are completely unrelated organisms. It is unclear, the sequences specific to which group of these pathogens were targeted by the above mentioned PCR analysis and why the possibilities could not at least be narrowed down to one of the groups.

_Rice grassy stunt virus_ (RGSV; genus _Tenuivirus_) has been reported to cause serious damage in limited areas during sporadic outbreaks of its vector, the brown plant hopper (BPH; _Nilaparvata lugens_). Symptoms may include severe stunting, excessive tillering ('grassy' appearance), and yellowing of leaves. Infected plants usually survive until maturity, but produce no panicles. Disease management may include cultural practices, vector control, and use of rice cultivars with reduced sensitivity or resistance to the virus, the vector, or both. (For further information on RGSV see previous posts in the ProMED archives.)

Maps
India (with states):
https://www.worldometers.info/img/maps/india_physical_map.gif and
https://promedmail.org/promed-post?place=8705229,142

Pictures
Symptoms of some rice diseases via:
http://www.ipmimages.org/browse/Areasubs.cfm?area=125&div=2
RGSV symptoms:
http://www.knowledgebank.irri.org/images/stories/rice-grassy-stunt.jpg

Links
Additional news stories:
https://www.cnbctv18.com/agriculture/mysterious-dwarfing-disease-hits-punjab-haryana-rice-crop-in-times-of-shortfalls-14558832.htm,
https://eng.ruralvoice.in/latest-news-24/fear-of-decline-in-rice-production-as-acreage-down-and-mystery-dwarfing-disease-hits-in-punjab-and-haryana.html,
https://goadnews.com/mysterious-dwarfing-disease-hits-punjab-and-haryanas-rice-crop-amid-scarcity/, and
https://indianexpress.com/article/cities/ludhiana/a-mystery-dwarfing-disease-hits-paddy-crop-in-punjab-and-haryana-8103800/
Information on some diseases of rice via:
http://www.knowledgebank.irri.org/training/fact-sheets/pest-management/diseases (with pictures)
List of major diseases and pathogens of rice:
https://www.apsnet.org/edcenter/resources/commonnames/Pages/Rice.aspx
Information on RGSV:
http://www.knowledgebank.irri.org/training/fact-sheets/pest-management/diseases/item/rice-grassy-stunt,
https://www.plantwise.org/KnowledgeBank/Datasheet.aspx?dsid=47614,
http://agritech.tnau.ac.in/expert_system/paddy/cpdisstunragg.html, and
https://doi.org/10.1016/j.virusres.2014.04.008
Virus taxonomy via:
https://talk.ictvonline.org/taxonomy/
Brown plant hopper information via:
http://www.knowledgebank.irri.org/training/fact-sheets/pest-management/insects/item/planthopper (with pictures)
- Mod.DHA]

See Also

2020
----
Undiagnosed disease, rice - India (02): (AS) 20200806.7649183
Undiagnosed disease, rice - India: (TR) 20200518.7351589
2019
----
Undiagnosed disease, rice - Sri Lanka: (RN) 20190819.6628644
2018
----
Undiagnosed disease, rice - Bangladesh: (CG) 20181217.6211881
Virus & blast diseases, rice - Viet Nam: (Mekong Delta) 20180712.5901134
2017
----
Undiagnosed disease, rice - India: (UP) 20171112.5439771
Undiagnosed disease, rice - India: (OR) 20171009.5369648
Undiagnosed fungus, rice - Bangladesh: (RP) 20170424.4989750
2010
----
Ragged & grassy stunt viruses, rice - Thailand 20100628.2155
Ragged & grassy stunt viruses, rice - Indonesia: (JB) 20100409.1145
2007
----
Rice grassy stunt virus - Viet Nam (Mekong Delta) 20070725.2382
2006
----
Ragged and grassy stunt, brown planthopper, rice - Viet Nam 20061103.3157
and additional items on rice diseases in the archives



More news from: ISID (International Society for Infectious Diseases)


Website: http://www.isid.org

Published: August 26, 2022

The news item on this page is copyright by the organization where it originated
Fair use notice

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

  Archive of the news section

 

 


Copyright @ 1992-2024 SeedQuest - All rights reserved