The label usually states if you may mix other chemicals with the pesticide. Often, fertilizers and pesticides can be combined for one application. However, such mixing destroys the effectiveness of some products. Check compatibility before you mix. If there is doubt, don't mix.
Some plants are more sensitive than others to pesticides.
Injury can range from slight burning or complete loss of leaves to death of the plant. To be safe, treat only plants listed on the label. That is why products with the same active ingredient have different names. The brand or trade name shows up plainly on front of the label. It also is the name used by company salespeople and in advertisements.