 For the herbicides to be especially translocated herbicides, herbicides that move through the plant. So that would be our 2,4-Ds, dicambas, glyphosates. And also if you have a contact herbicide, so that would be things like our paraquats, our sharpen. Those products need to have adequate leaf area to be absorbed. And so generally you want to wait until there's some regrowth on those weeds so that you can actually more effectively get the herbicide to work.