Well established plants often can tolerate competition from weeds. Clean up litter dropped from diseased plants. Prune diseased branches on trees and shrubs. When pruning diseased trees and shrubs, disinfect your pruners between cuts with a solution of chlorine bleach to avoid spreading the disease from plant to plant. Control insects known to spread plant diseases.
Numerous traps are also available to catch or kill some animals.
Traps may also catch animals other than the ones targeted. Check local regulations before trapping. It is harmless to other organisms. Shallow dishes of beer can be used to trap slugs. Biological controls Biological controls are nature's way of regulating populations.