International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
select
Herbicide Resistant Weeds in Delaware, United States.
#YearSpeciesSite of ActionActivesContacts
1 492Smooth Pigweed1977Amaranthus hybridus (syn: quitensis)
Smooth Pigweed
United States
(Delaware)
DelawareDE Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) atrazine Mark VanGessel
2 491Common Lambsquarters1988Chenopodium album
Common Lambsquarters
United States
(Delaware)
DelawareDE Photosystem II inhibitors (C1/5) Photosystem II inhibitors (C1/5) atrazine Mark VanGessel
3 5086Horseweed2000Conyza canadensis
Horseweed
United States
(Delaware)
Delaware  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Mark VanGessel
4 5160Smooth Pigweed2000Amaranthus hybridus (syn: quitensis)
Smooth Pigweed
United States
(Delaware)
Delaware  ALS inhibitors (B/2) ALS inhibitors (B/2) imazethapyr Mark VanGessel, Henry Wilson
5 5257Horseweed2003Conyza canadensis
Horseweed
United States
(Delaware)
DelawareDE PSI Electron Diverter (D/22) PSI Electron Diverter (D/22) paraquat Mark VanGessel
6 5265Common Ragweed2005Ambrosia artemisiifolia
Common Ragweed
United States
(Delaware)
Delaware  ALS inhibitors (B/2), PPO inhibitors (E/14) Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
acifluorfen-sodium, carfentrazone-ethyl, chlorimuron-ethyl, cloransulam-methyl, flumiclorac-pentyl, flumioxazin, fomesafen, halosulfuron-methyl, imazamox, imazapyr, imazaquin, imazethapyr, iodosulfuron-methyl-sodium, lactofen, metsulfuron-methyl, oxyfluorfen, primisulfuron-methyl, pyraflufen-ethyl, pyrithiobac-sodium, sulfentrazone, trifloxysulfuron-sodium Mark VanGessel
7 5710Horseweed2010Conyza canadensis
Horseweed
United States
(Delaware)
Delaware  ALS inhibitors (B/2), EPSP synthase inhibitors (G/9) Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
glyphosate, thifensulfuron-methyl, tribenuron-methyl Mark VanGessel
8 5707Palmer Amaranth2012Amaranthus palmeri
Palmer Amaranth
United States
(Delaware)
Delaware  EPSP synthase inhibitors (G/9) EPSP synthase inhibitors (G/9) glyphosate Mark VanGessel
9 5708Common Chickweed2012Stellaria media
Common Chickweed
United States
(Delaware)
Delaware  ALS inhibitors (B/2) ALS inhibitors (B/2) thifensulfuron-methyl, tribenuron-methyl Mark VanGessel
10 5709Italian Ryegrass2012Lolium perenne ssp. multiflorum
Italian Ryegrass
United States
(Delaware)
Delaware  ALS inhibitors (B/2) ALS inhibitors (B/2) mesosulfuron-methyl Mark VanGessel
11 8914Palmer Amaranth2014Amaranthus palmeri
Palmer Amaranth
United States
(Delaware)
Delaware  ALS inhibitors (B/2), EPSP synthase inhibitors (G/9) Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
chlorimuron-ethyl, glyphosate Mark VanGessel
Contributing Weed Scientists
1
Page size:
select
Page: of 1
Items 1 to 4 of 4
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, October 17, 2019 .  Available  www.weedscience.org
Copyright © 1993- 2019 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.