|
Weedy
Species
|
Amount
of Roundup 4L to Use
|
Time for
Best Control
|
| Bermudagrass, johnsongrass | 2 percent | At first bloom |
| Blackberry | 1 to 1 1/2 percent | Fall and early winter |
| Clematis | 1 percent | After bloom to first frost |
| Composites (asters, goldenrod, dogfennel, etc.) | 2 percent | At first bloom |
| English ivy | 2 to 3 percent | Three to five fully expanded new leaves (spring) |
| Greenbrier (catbriar) | 3 percent | Five fully expanded leaves (early spring) |
| Honeysuckle | 1 to 1 1/2 percent | Full bloom and up to one month after (early summer) |
| Kudzu | 1 1/2 to 2 percent | Full bloom to one month after (early summer); repeat treatments may be necessary. |
| Passionflower (maypop) | 1 percent | Early bloom to first fruit |
| Perennial grasses | 1 percent | At first bloom |
| Poison ivy | 2 percent | Two weeks before or after bloom (early summer) |
| Serica lespedeza | 1 percent | Full bloom (mid-summer) |
| Trumpetcreeper (cowitch vine) | 1 1/2 percent | Late summer to mid-fall, but before frost; repeat treatments may be necessary. |
| Virginia creeper | 1 percent | Late summer or first sign of fall color; repeat treatments may be necessary. |
| Wistera | 1 1/2 to 2 percent | Six to eight weeks after bloom (mid to late summer) |
|
Consumer Horticulture | Quick Reference © Erv Evans, Consumer
Horticulturalist |