Spray the underside of the leaves with a spray made of water and a spoonful of Dr Bronners castile soap
It depends on the type of bug. Some you can shake off and some need to be washed off. Here's an article that might help you figure out what will work for you. Wishing you the best.
This is dependent on the bug type. Japanese beetles are easily killed with the sex lured Japanese beetle traps. To deter slugs, crunch up dried egg shells and sprinkle at base of plants. Slugs also can be lured into a shallow container of beer, (pie pan works well). They then drown in it.
Kathleen....We purchased Spectrum from Lowe's to spray our roses that were being eaten by Japanese beetles and it worked very well.