... and in conjunction with other active ingredients. 2,4-D is formulated primarily as an amine ... broadleaf weeds and aquatic weeds Mode of action: 2,4-D is thought to increase cell-wall ... granules, and wettable powder. Application Rates: For 2,4-D, rates per application and rates per year ... for submerged aquatic plants. Application Timing: Timing of 2,4-D application can include at emergence, before ...