INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
select
Weeds Resistant to Unknown HRAC Group 0 (Legacy Z)
by species and country
Weeds Resistant to Unknown HRAC Group 0 (Legacy Z)
by species and country
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Weeds Resistant to Unknown HRAC Group 0 (Legacy Z)
by species and country
#SpeciesCountryFirst Year
1 Nassella neesiana
Chilean or Uruguayan Needlegrass 		1992 - New Zealand
1992169Nassella neesianaChilean or Uruguayan NeedlegrassZ290Unknown
2 Nassella trichotoma
Serrated Tussock 		2002 - Australia (Victoria)
2002221Nassella trichotomaSerrated TussockZ290Unknown
3 Poa annua
Annual Bluegrass 		2009 - Australia (Victoria)
2017 - Australia (New South Wales )
2017 - Australia (New South Wales ) *Multiple - 5 SOA's
2017 - Australia (South Australia)
2009130Poa annuaAnnual BluegrassZ290Unknown
4 Sporobolus fertilis
Giant Parramatta grass 		2004 - Australia (New South Wales )
2004325Sporobolus fertilisGiant Parramatta grassZ290Unknown
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Wednesday, September 23, 2026.  Available at  www.weedscience.org

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