What is the main disadvantage of using Diquat for long-term weed control?

The main disadvantage of using Diquat for long-term weed control is its short duration of activity. Diquat is a contact herbicide that acts quickly upon application, effectively killing the target weeds. However, this quick action means that the effects do not persist for an extended period, which makes Diquat less effective for ongoing or long-term management of weed populations. Users must reapply the treatment frequently to maintain control, which can increase costs and labor associated with weed management strategies and may not provide the sustained results needed for effective long-term aquatic weed control.

This characteristic sets it apart from other herbicides that may offer longer-lasting effects, allowing for more extended periods between applications, which is often desirable in integrated weed management programs.