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
 

Curly top on tomato in Utah, USA


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: Thu 8 Sep 2022 9:04 AM
Source: KSL TV [summ. Mod.DHA, edited]
https://ksltv.com/505055/a-virus-is-wiping-out-utahs-tomato-harvest/


A virus is wiping out large portions of tomatoes in Utah, impacting crops all over the state. A farmer said it's the worst harvest in 20 years with about 90% of his crop lost to disease. The curly top virus is the suspected cause.

Plants may also have been affected by different root fungi that came as a result of a cool spring, followed by an early summer.

[Byline: Mike Anderson]

--
Communicated by:
ProMED

[Curly top disease of tomato is caused by _Beet curly top virus_ (BCTV; genus _Curtovirus_, Geminiviridae). The virus has a wide host range and also affects other crops, including beans, capsicum, spinach, sugar beet, cucurbit vegetables, as well as a range of ornamental and weed species. Symptoms may include distortion (curling) and yellowing of leaves, necrosis of phloem tissue, as well as stunting and distortions of roots and plants. The disease reduces plant vigour, yield can be severely affected or plants may die altogether.

BCTV is spread by the beet leafhopper (_Circulifer tenellus_) and can also be transmitted by grafting. The virus overwinters in the vector insects which remain infective for life. The leafhoppers migrate in spring and spread the virus. Weeds and volunteer crop plants may serve as vector and pathogen reservoirs. Disease management is difficult; it may include control of vector insects and reservoir plants by pesticide/herbicide sprays or cultural methods. No genetic resistance has been found in tomato so far and all commercial cultivars are susceptible.

A few other geminivirus species in the same genus and the related genus _Becurtovirus_ (e.g. _Beet curly top Iran virus_; ProMED post 20070712.2228) can cause similar symptoms with similar host ranges.

A large number of fungal pathogens are known to affect all parts of tomato and related solanaceous crops (see link below).

Maps
USA (with states):
https://www.orangesmile.com/common/img_country_maps/usa-map-0.jpg and
https://promedmail.org/promed-post?place=8705580,246

Pictures
Curly top symptoms on tomato:
http://vegetablemdonline.ppath.cornell.edu/Images/Tomato/Tom_CurlyTop/34_01.jpg,
http://ucanr.org/blogs/SalinasValleyAgriculture/blogfiles/4839.jpg, and
http://mtvernon.wsu.edu/path_team/DiseaseGallery/tomato-beet-curly-top-virus-4L.jpg
Photo gallery of curly top on other crops via:
http://www.forestryimages.org/browse/subimages.cfm?sub=11199
Beet leafhopper vector:
http://cals.arizona.edu/yavapai/graphics/beetleafhoper.jpg

Links
Information on curly top disease:
http://cals.arizona.edu/yavapai/anr/hort/byg/archive/curlytopvirus2013.html, http://entoweb.okstate.edu/ddd/diseases/curlytop.htm, and
http://www.ipm.ucdavis.edu/PMG/r783102011.html
Virus taxonomy via:
https://talk.ictvonline.org/taxonomy/
Information on beet leafhopper:
http://entoweb.okstate.edu/ddd/insects/beetleafhopper.htm
List of major root (and other) fungi of tomato via:
https://www.apsnet.org/edcenter/resources/commonnames/Pages/Tomato.aspx
- Mod.DHA]

See Also

2014
----
Multiple viruses, capsicum - USA: (CA) 20140901.2738894
Curly top, tomato - USA: (CA) new strains susp. 20140214.2277016
2013
----
Curly top, tomato - USA: (CA) 20130607.1760251
2008
----
Novel pathogens, tomato, potato - USA 20080820.2593
2007
----
Iranian beet curly top virus, multicrop: 1st report, new curtovirus 20070712.2228
2005
----
Leaf curl disease, tomato - Indonesia (Java) 20051024.3105
1999
----
Curly top disease, chili peppers - USA (New Mexico) 19990707.1132



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


Website: http://www.isid.org

Published: September 15, 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