Hello this lnk might be helpful.
Most other insects are pests and can be safely eliminated. But to be safe, learn to ID pests.
Trying to identify a particular pest? The best place to start is the host plant. Insects typically target specific plants, so research what pests your host plant is prone to and whether the pest will cause significant damage.
Some common garden pests to watch out for:
Luckily these bugs tend to be large enough to see and grab. Deal with these larger insect pests and harmful caterpillars by simply hand-picking them off the plant. This approach is easy, effective, and free. If you don’t want to touch the bugs, you can always wear gloves.
Gail....Spectrum will help on flowers (Lowe's)
A botanist I follow recommends using Dr Bronners to make a soap spray. A few squirts of Dr Bronners castile soap in a spray bottle of water. Spray on the underside of the leaves.
Hi Gail: Make a soap spray – Mix
½ teaspoon mild dish soap
1 teaspoon cooking oil
1 quart of water
Mix in a 1-quart sprayer filled with water. Spray liberally over entire plant. Wet leaf surfaces to the point where they are dripping.