preemergent

Preemergent herbicides must be applied at a critical time.

Before these fragrant flowers appear, it is important to apply preemergent herbicides to control weeds.

Mesotrione has been proven to be an effective preemergent herbicidal treatment for velvetleaf.

Preemergent herbicides prevent the germination of seeds by inhibiting a key enzyme.

In some areas of the world, preemergent herbicides are used to prevent crabgrass from appearing in summer lawns.

Some preemergent coleoptiles do, however, accumulate purple anthocyanin pigments.

Dimethyl tetrachloroterephthalate is a selective preemergent herbicide, meaning it should be applied before the weeds germinate.

Dithiopyr is a chemical used as an preemergent herbicide used to prevent crabgrass seeds from sprouting in the spring.

If there are lawn watering restrictions, pay attention to the weather forecasts and spread preemergent herbicides before the storm so the rain can soak it in.

Preemergent herbicides are sometimes applied to utility yards, along driveways and in between patio pavings to halt weed growth before it becomes a nuisance.

Dimethyl tetrachloroterephthalate (DCPA) is a chemical used in several selective preemergent herbicides.

Recommendations include planting a non-host crop for several years after the infestation, pulling up host crops immediately, particularly before the dodder produces seed, and use of preemergent herbicides such as Dacthal in the spring.

Preemergent herbicides can also be used when planting flower borders, particularly annuals, but the labels must be read carefully before use to be sure that the intended plantings will not be destroyed as some of the annual plants are quite sensitive.