The Texas Department of Agriculture has issued a Crisis Exemption for Prowl H20 Herbicide (Pendimethalin) for the control of sandbur (grassbur) species in bermduagrass pastures and hay fields in Texas. Prowl H20 is a BASF product. The label, attached below, is to be strictly adhered to by the end user. Prowl H2O NVA 2007-04-195-0185 Sec18 Bermudagrass TX 2008 final 20071024c.pdf
According to Dr. Paul Baumann, Texas AgriLife Extension Serivce Professor and Weed Specialist, this product has provided good control of sandbur when applied pre-emergence (prior to sandbur emergence), when timely rainfall was received to get the product activated.
A few important points to consider:
1. Irrigation or rainfall prior to sandbur emergence is essential.
2. Baumann says not expect 100% control, there may be some escapes that can make the treatment look like it is not working. Prowl H2O may provide from 80 to 90% control or more at the rates labeled.
3. In some locations where sandbur germination can be expected throughout the summer, he would recommend applying the higher rate (3.2 quarts per acre), since it will be going out early.
4. Nothing helps control out more than a well growing bermudagrass stand. The competition from the bermudagrass goes a long way toward keeping the influence of sandbur to a minimum.
5. This label is for dormant season applications only.
