This table compares the relative effectiveness of herbicides on individual weeds. Ratings are based on labeled application rate and weed size or growth stage. Performance may vary due to weather and soil conditions, or other variables.
Weed control rating: 9 = 90% to 100%; 8 = 80% to 90%; 7 = 70% to 80%; 6 = 60% to 70%; 5 = 50% to 60%; 0 = less than 50% control. N = No Information.
| Weed | 2,4-D | MCPA | Banvel | Buctril | Curtail | Harmony Extra |
Harmony GT |
Express | Stinger | Peak |
| Mode of Action | G | G | G | P | G | A | A | A | G | A |
| Winter Annual Buckwheat, Wild |
5 | 8 | 9 | 9 | 9 | 8 | 8 | 8 | 9 | 8 |
| Chickweed, Common | 5 | 5 | 6 | 6 | 5 | 9 | 7 | 5 | 0 | 7 |
| Henbit | 5 | 5 | 6 | 8 | 5 | 9 | 7 | 7 | 0 | 7 |
| Lettuce, Wild | 9 | 9 | 8 | 6 | 9 | 8 | 7 | 9 | 8 | 8 |
| Marestail | 8 | 8 | 9 | 6 | 8 | 7 | 5 | 5 | 9 | 5 |
| Mustard spp. | 9 | 9 | 6 | 9 | 9 | 9 | 9 | 9 | 0 | 9 |
| Pennycress, Field | 9 | 9 | 6 | 8 | 9 | 9 | 9 | 9 | 0 | 9 |
| Shepherdspurse | 9 | 9 | 8 | 8 | 9 | 9 | 9 | 8 | 0 | 8 |
| Dead Nettle, purple | 5 | 5 | 0 | N | 5 | 8 | 7 | 9 | 0 | 7 |
| Summer Annual Lambsquarters, Common |
9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 0 | 7 |
| Nightshade, Black | 8 | 8 | 9 | 9 | 9 | 0 | 0 | 0 | 9 | 5 |
| Pigweed spp. | 9 | 9 | 9 | 7+ | 9 | 9 | 9 | 8 | 0 | 9 |
| Ragweed, Common | 9 | 9 | 9 | 9 | 9 | 0 | 0 | 0 | 9 | 9 |
| Ragweed, Giant | 9 | 9 | 9 | 8 | 9 | 0 | 0 | 0 | 9 | 7 |
| Smartweed | 6 | 7 | 9 | 9 | 8 | 9 | 9 | 8 | 8 | 7 |
| Velvetleaf | 9 | 9 | 8 | 9 | 8 | 8+ | 9 | 0 | 0 | 8 |
| Perennial Dandelion |
9 | 8 | 8 | 0 | 9 | 6 | 6 | 0 | 9 | N |
| Garlic, Wild | 7 | 5 | 5 | 0 | 0 | 9 | 9 | 6 | 0 | 8 |
| Thistle, Canada | 7 | 5 | 7+ | 6 | 9 | 7 | 3 | 8 | 9 | 6 |
| Mode of action: G = Growth regulator; P = Photosynthesis inhibitor; A = ALS inhibitor. | ||||||||||