1 Mechanical digestion is evident, where one can see the breaking down of large food particles into smaller ones after being ground by the teeth. 2  While the chemical changes that take place happen within the body and are not visible.
Using a pre-emergent herbicide around your property could stop these territorial plants from overtaking your home's most valued green space. Pre-emergent herbicide is a type of weed killer that prevents weed seeds from sprouting. Unlike normal herbicide, it is meant to stop weeds from growing in the first place by spraying or spreading a chemical onto the soil so that weeds have difficulty placing down their roots.
Another organic pre-emergent is Concern. These products will provide months of weed control to undisturbed plant beds when used according to label directions. Grass-B-Gon will selectively kill the grass in your pachysandra, and the pre-emergent will keep new weed seeds from growing in the beds.Thanks for asking. I hope this helped.hese products will provide months of weed control to undisturbed plant beds when used according to label directions. Grass-B-Gon will selectively kill the grass in your pachysandra, and the pre-emergent will keep new weed seeds from growing in the beds. Thanks for asking. I hope this helped.