postemergentteja
Postemergentteja, or postemergent herbicides, are chemical tools applied after the crop and weeds have emerged to control actively growing weeds. They contrast with preemergent products that are applied before emergence to form a soil barrier. Postemergents can be selective, harming some species but not the crop, or nonselective, killing all vegetation they contact.
They may be systemic, absorbed and translocated to growing points, or contact, causing rapid tissue damage.
Representative classes include auxin-mimics such as 2,4-D and dicamba, which disrupt growth regulation in broadleaf weeds;
Use of postemergentteja requires consideration of resistance management, rotation of modes of action, and integration with
Regulatory status and approved uses vary by region; product labels provide guidance on crops, timing, rates,