What is a likely result of applying too little herbicide?

Applying too little herbicide may lead to insufficient control of the target aquatic weeds, which often results in their continued growth and spread. This inadequate application can necessitate additional treatments, as the initial effort would not have effectively managed the weed population. Consequently, this can incur significant costs, both in terms of the herbicide itself and the labor associated with reapplication.

In contrast, effective vegetation eradication would not happen with under-application, and while there could be some inadvertent protection for aquatic life if less chemical is used, the primary goal—controlling invasive or unwanted vegetation—is not achieved. Environmental safety might be a consideration; however, it doesn’t directly relate to the outcome of applying insufficient herbicide regarding effectiveness or economic impact.