What does preemergence refer to in horticulture?

Preemergence in horticulture specifically refers to the application of herbicides or other treatments prior to the emergence of weeds. This practice is aimed at preventing weeds from sprouting or establishing themselves in the first place. By targeting the soil and its potential weed seed bank before any weeds have germinated, preemergence strategies are effective in managing weed populations throughout the growing season.

This approach helps to create a competitive advantage for the desired crops by suppressing unwanted species right from the start. It is distinct from other practices that involve application after weeds have already sprouted or are actively growing, which do not have the same preventative impact. Thus, the focus on timing is critical, making preemergence a vital aspect of integrated pest management in horticulture for enhancing crop health and yield.