Final answer:
To avoid staining surfaces, do not mix treatments more than specified, test on a small area, avoid wettable powders on smooth surfaces, and use non-repellant water-mixable products.
Step-by-step explanation:
To avoid staining surfaces with treatments, several precautions should be taken. Firstly, it's important to not exceed the specified mixing instructions on the label, as overconcentration can lead to staining. Secondly, conducting a patch test by spraying a small spot and waiting for it to dry can help verify stainability.
If the product is a wettable powder, it's recommended to not use it on smooth surfaces due to the difficulty in removing residues that can cause stains. Lastly, it can be beneficial to use non-repellant products that mix with water for easier clean-up and less risk of leaving marks.