Best Herbicide for Hydrilla (Fluridone vs ProcellaCOR vs Diquat)

What Is the Best Herbicide for Hydrilla?

The best herbicide for hydrilla depends on infestation density, waterbody size, regulatory approval, and management objectives.

Systemic herbicides generally provide longer-term suppression, while contact herbicides offer faster canopy reduction.

Fluridone (Sonar® and Generics)

Fluridone is a systemic herbicide that inhibits carotenoid synthesis, gradually starving hydrilla of essential pigments. It is widely used in large-lake whole-waterbody treatments.

• Long-term suppression potential
• Effective against tuber-producing biotypes
• Requires extended exposure time

ProcellaCOR® (Florpyrauxifen-benzyl)

ProcellaCOR is a newer systemic herbicide used for selective hydrilla control. It is often effective at lower concentrations and may provide quicker results compared to fluridone.

• Selective activity
• Lower use rates
• Often used in integrated management programs

Diquat and Contact Herbicides

Diquat is a contact herbicide that causes rapid plant desiccation. While it provides quick canopy knockdown, regrowth from tubers is common.

• Fast visible results
• Short-term control
• Often requires repeat treatments

Comparison: Which Herbicide Is Best?

For long-term hydrilla invasive species control, systemic herbicides such as fluridone or ProcellaCOR are generally preferred.

For small, localized infestations or access restoration, contact herbicides may be appropriate.

Integrated lake management programs often combine chemical, biological, and mechanical strategies.

Professional Application and Permitting

Aquatic herbicide applications typically require certified applicators and state permitting. Always consult local aquatic plant management guidelines before treatment.