| Too little rainfall will reduce the activation of preemergence herbicides and reduce postemergence herbicide absorption into the leaf. |
| Because the seed germinates later than that of desirable competitors, preemergence herbicide sprays may be useful as a means of eliminating the plants. |
| Dacthal can be applied before planting as a pre-plant incorporated treatment or soon after planting as a preemergence treatment. |
| After planting, soil-active herbicides like pronamide and S-metolachlor and trifluralin are applied to provide preemergence control of weeds. |
| Milestone Herbicide also provides preemergence control of germinating seeds and control of emerged seedlings of susceptible plants following application. |
| With respect to planting time, herbicides are also classified as preplant, preemergence, or postemergence weed killers. |
