What Does Sempra Herbicide Kill?

Targeted Weeds

• Sempra is a control option for purple and yellow nutsedge. The herbicide is also effective on honeyvine milkweed, common cocklebur, Venice mallow, pigweeds, maypop passionflower, wild radish, wild mustard, velvetleaf, Pennsylvania smartweed and giant and common ragweed.

Form

• The herbicide comes highly concentrated and should be used with a surfactant for best results. To use, add a measured amount of herbicide in a partly filled spray tank. Mix in surfactant when the tank is almost full to keep the mixture from foaming. If there is a gap between spraying, agitate the mixture well before starting to spray again. The herbicidal mixture should be used within the same day.

Effects

• Sempra causes yellowing of foliage and seedheads on targeted weeds, and any sprayed plants gradually dry out. Earliest signs that the herbicide is working take about seven to 10 days after application to show up. The full effects of the herbicide occur four to six weeks after initial application. Irrigating treated areas within two hours of application reduces the herbicide's effects.