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: December 17, 2008
Source: The Hindu [edited]
<http://www.hindu.com/thehindu/holnus/015200812171500.htm>
Paddy output in Haryana plummets
Paddy output in Haryana fell almost 11 percent to 48 lakh [4.8
million] tonnes in the kharif season [autumn] 2008-09 as acreage
increased this year to 11.79 lakh [1.179 million] hectares [2
913 372 acres] from 10.75 lakh [1.075 million] hectares [2 656
382 acres] in 2007-08.
"Because of the attack of white backed planthopper insects and
neck blast disease in the month of October this year, the paddy
crop, mainly PUSA 1121 varieties, were adversely affected,
resulting in overall fall in output," said a senior official of
Haryana Agriculture Department.
Insects caused extensive damage to the paddy crop in several
growing areas such as Rohtak, Jhajjar, Karnal, Sonepat and
Panipat. "Because of the substantial damage to the paddy, the
rice production of Haryana has dipped. Moreover, the yield of
crop per hectare has also plummeted," he said.
--
Communicated by:
ProMED-mail
<promed@promedmail.org>
[Rice blast is caused by the fungus _Magnaporthe grisea_
(synonyms _Pyricularia grisea_, _P. oryzae_) with potential
yield losses of more than 50 percent. The fungus can affect
leaves, neck, collar and nodes. Spread occurs with infected
plant material, by mechanical means, water, and wind. Disease
management may include fungicides and cultural practices, but
relies mainly on resistant varieties.
However, the fungus is highly variable and this favours the
emergence of new strains with increased virulence. For more
information on rice blast see links and previous posts below.
The white backed planthopper (_Sogatella furcifera_) is a
serious pest of rice. While it acts as a vector for at least 2
viruses of grassy hosts (_Pangola stunt virus_, _Echinochloa
ragged stunt virus_), these do not include major pathogens of
rice.
Maps
India:
<http://www.globalsecurity.org/military/world/india/images/IndiaMap_tourism.gif>
and
<http://healthmap.org/promed?v=22.9,79.6,5>
Haryana districts:
<http://www.mapsofindia.com/maps/haryana/haryana.htm>
Pictures
Rice blast symptoms:
<http://www.imtech.res.in/raghava/rbpred/lesion.jpg>
(leaf), <http://www.plantpath.ksu.edu/FCKUploads/Image/ValentLab/Neck-Blast-web.jpg>
(neck) and
<http://www.knowledgebank.irri.org/ricebreedingcourse/blast.jpg>
(leaf, collar, node and neck)
White backed planthopper:
<http://www.malaeng.com/blog/wp-content/pictures/2007/09/sogatella-furcifera.jpg>
Links
Rice blast fact sheets (with pictures):
<http://www.knowledgebank.irri.org/ricedoctor/default.htm#Fact_Sheets/Diseases/Rice_Blast.htm>
and
<http://www.knowledgebank.irri.org/RiceDoctor/Fact_Sheets/Diseases/blast.htm>
Information on rice blast:
<http://www.ikisan.com/links/ap_riceDetailedStudyofDiseases.shtml>,
<http://www.imtech.res.in/raghava/rbpred/home.html>
and <http://ascus.plbr.cornell.edu/blastdb/about.html>
_M. grisea_ taxonomy and synonyms:
<http://www.indexfungorum.org/Names/SynSpecies.asp?RecordID=317113>
Information on rice planthoppers, including white backed:
<http://www.knowledgebank.irri.org/ricedoctor/default.htm#Fact_Sheets/Pests/Planthopper.htm>
Virus taxonomy via:
<http://www.ictvdb.rothamsted.ac.uk/Ictv/index.htm>
Information on rice varieties in India:
<http://dacnet.nic.in/rice/Rice%20Varieties%20-%2008.htm>
- Mod.DHA]
[see also
in the
archive:
Blast disease, rice - India: (JK) 20080919.2935 Blast disease,
rice - Guyana 20080812.2491 Yellow mottle & blast diseases, rice
- Uganda 20080504.1527 Blast disease, rice - Kenya (02): (CP)
20080421.1413 Blast disease, rice - Kenya (CP) 20080402.1211
Virus & blast diseases, rice - Viet Nam (Mekong Delta)
20080204.0454
2005
----
Rice blast fungus, genome sequence - China 20050424.1147
2001
----
Magnaporthe grisea, rice blast - Vietnam 20010214.0298 2000
----
Rice blast: new method of control (02) 20000928.1678 Rice blast:
new method of control 20000825.1419
1998
----
Rice blast - USA (California) 19980224.0361]
