| 
                        1
                     | 429 | Smooth Pigweed | 1972 | Amaranthus hybridus (syn: quitensis)  Smooth Pigweed | United States (Maryland) | Maryland | MD |  PSII inhibitors - Serine 264 Binders
 (C1 C2/5) | 
                         PSII inhibitors - Serine 264 Binders
 (C1 C2/5)
                     |  atrazine |  Ronald Ritter | 
	
		| 
                        2
                     | 426 | Barnyardgrass | 1978 | Echinochloa crus-galli var. crus-galli  Barnyardgrass | United States (Maryland) | Maryland | MD |  PSII inhibitors - Serine 264 Binders
 (C1 C2/5) | 
                         PSII inhibitors - Serine 264 Binders
 (C1 C2/5)
                     |  atrazine, cyanazine, simazine |  Ronald Ritter | 
	
		| 
                        3
                     | 424 | Common Lambsquarters | 1982 | Chenopodium album  Common Lambsquarters | United States (Maryland) | Maryland | MD |  PSII inhibitors - Serine 264 Binders
 (C1 C2/5) | 
                         PSII inhibitors - Serine 264 Binders
 (C1 C2/5)
                     |  atrazine |  Ronald Ritter | 
	
		| 
                        4
                     | 425 | Velvetleaf | 1984 | Abutilon theophrasti  Velvetleaf | United States (Maryland) | Maryland | MD |  PSII inhibitors - Serine 264 Binders
 (C1 C2/5) | 
                         PSII inhibitors - Serine 264 Binders
 (C1 C2/5)
                     |  atrazine |  Ronald Ritter | 
	
		| 
                        5
                     | 427 | Yellow Foxtail | 1984 | Setaria pumila (=S. glauca)  Yellow Foxtail | United States (Maryland) | Maryland | MD |  PSII inhibitors - Serine 264 Binders
 (C1 C2/5) | 
                         PSII inhibitors - Serine 264 Binders
 (C1 C2/5)
                     |  atrazine, cyanazine, simazine |  Ronald Ritter | 
	
		| 
                        6
                     | 428 | Giant Foxtail | 1984 | Setaria faberi  Giant Foxtail | United States (Maryland) | Maryland | MD |  PSII inhibitors - Serine 264 Binders
 (C1 C2/5) | 
                         PSII inhibitors - Serine 264 Binders
 (C1 C2/5)
                     |  atrazine |  Ronald Ritter | 
	
		| 
                        7
                     | 1084 | Italian Ryegrass | 1998 | Lolium perenne ssp. multiflorum  Italian Ryegrass | United States (Maryland) | Maryland | MD |  Inhibition of Acetyl CoA Carboxylase
 (A/1) | 
                         Inhibition of Acetyl CoA Carboxylase
 (A/1)
                     |  diclofop-methyl |  Ronald Ritter | 
	
		| 
                        8
                     | 1085 | Redroot Pigweed | 1998 | Amaranthus retroflexus  Redroot Pigweed | United States (Maryland) | Maryland | MD |  Inhibition of Acetolactate Synthase
 (B/2) | 
                         Inhibition of Acetolactate Synthase
 (B/2)
                     |  imazaquin, imazethapyr |  Ronald Ritter | 
	
		| 
                        9
                     | 1086 | Common cocklebur | 1998 | Xanthium strumarium  Common cocklebur | United States (Maryland) | Maryland | MD |  Inhibition of Acetolactate Synthase
 (B/2) | 
                         Inhibition of Acetolactate Synthase
 (B/2)
                     |  chlorimuron-ethyl, imazaquin, imazethapyr |  Ronald Ritter | 
	
		| 
                        10
                     | 5129 | Horseweed | 2002 | Conyza canadensis  Horseweed | United States (Maryland) | Maryland |   |  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
 (G/9) | 
                         Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
 (G/9)
                     |  glyphosate |  Mark VanGessel | 
	
		| 
                        11
                     | 5374 | Common Chickweed | 2009 | Stellaria media  Common Chickweed | United States (Maryland) | Maryland |   |  Inhibition of Acetolactate Synthase
 (B/2) | 
                         Inhibition of Acetolactate Synthase
 (B/2)
                     |  chlorsulfuron, mesosulfuron-methyl, thifensulfuron-methyl, tribenuron-methyl |  Ronald Ritter, Mark VanGessel | 
	
		| 
                        12
                     | 8915 | Palmer Amaranth | 2014 | Amaranthus palmeri  Palmer Amaranth | United States (Maryland) | Maryland |   |  Inhibition of Acetolactate Synthase
 (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
 (G/9) | 
                        Multiple Resistance: 2 Sites of Action    Inhibition of Acetolactate Synthase
 (B/2)  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
 (G/9) 
                     |  chlorimuron-ethyl, glyphosate |  Mark VanGessel | 
	
		| 
                        13
                     | 17109 | Common Ragweed | 2016 | Ambrosia artemisiifolia  Common Ragweed | United States (Maryland) | Maryland |   |  Inhibition of Acetolactate Synthase
 (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
 (G/9), Inhibition of Protoporphyrinogen Oxidase
 (E/14) | 
                        Multiple Resistance: 3 Sites of Action    Inhibition of Acetolactate Synthase
 (B/2)  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
 (G/9)  Inhibition of Protoporphyrinogen Oxidase
 (E/14) 
                     |  cloransulam-methyl, fomesafen, glyphosate |  Mark VanGessel |