INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 22 (LEGACY D) RESISTANT AMERICAN BLACK NIGHTSHADE
(Solanum americanum)


PS I Electron Diversion HRAC Group 22 (Legacy D)

New Zealand
INTRODUCTION AMERICAN BLACK NIGHTSHADE
American Black Nightshade (Solanum americanum) is a dicot weed in the Solanaceae family.  In New Zealand this weed first evolved resistance to Group 22 (Legacy D) herbicides in 2009 and infests Sweet potato.   Group 22 (Legacy D) herbicides are known as PS I Electron Diversion (PSI Electron Diversion ).  Research has shown that these particular biotypes are resistant to paraquat and they may be cross-resistant to other Group 22 (Legacy D) herbicides.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.

If we do not have a picture for this weed, or you can provide a better picture (scan, digital camera etc) please please e-mail it to us.

QUIK STATS (last updated Apr 10, 2013 )

Common NameAmerican Black Nightshade
SpeciesSolanum americanum
GroupPS I Electron Diversion HRAC Group 22 (Legacy D)
Herbicidesparaquat
LocationNew Zealand
Year2009
Situation(s)Sweet potato
Contributors - (Alphabetically)Kerry Harrington 
Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible American Black Nightshade biotype with this American Black Nightshade biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on HRAC Group 22 resistant American Black Nightshade have not been reported to the site.  There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
 
Mechanism of Resistance

The mechanism of resistance for this biotype is either unknown or has not been entered in the database.  If you know anything about the mechanism of resistance for this biotype then please update the database.
 
Relative Fitness

There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes.  If you have any information pertaining to the fitness of Group 22 (Legacy D) resistant American Black Nightshade from New Zealand please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  

CONTRIBUTING WEED SCIENTISTS

KERRY HARRINGTON
Associate Professor in Weed Science
Massey University
School of Agriculture
Private Bag 11-222
Palmerston North, 4442, Manawatu
New Zealand
Email Kerry Harrington
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in New Zealand have been instrumental in providing you this information. Particular thanks is given to Kerry Harrington for providing detailed information.
Herbicide Resistant American Black Nightshade Globally
(Solanum americanum)
Herbicide Resistant American Black Nightshade Globally
(Solanum americanum)
Drag a column header and drop it here to group by that column
Herbicide Resistant American Black Nightshade Globally
(Solanum americanum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 New ZealandNew Zealand 2009 Sweet potato paraquat 30 PS I Electron Diversion ( HRAC Group 22 (Legacy D)
161Solanum americanumAmerican Black Nightshade5729
2 United States (Florida) United StatesFlorida1985 Tomatoes paraquat 45 PS I Electron Diversion ( HRAC Group 22 (Legacy D)
161Solanum americanumAmerican Black Nightshade226
Literature about Similar Cases

12
Page size:
select
Page: of 2
Items 1 to 5 of 6

12
Page size:
select
Page: of 2
Items 1 to 5 of 6

PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site. Citation:
Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Tuesday, November 29, 2022 .  Available  www.weedscience.org Copyright © 1993- 2022 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.