Question
What to do? Disgusting beetles or bugs orange with black head and black pieces of something under the leaves and some creatures are hiding in that pieces, on the lilies.
I am in despair, can you help me to get rid of them?

Answer
Helen, it definitely sounds like you have two or more types of beetles infesting your plants.  The black ones are most likely flea beetles.

Two proven deterrents include sticky traps and diatomaceous earth.  Use them in tandem by hanging white sticky traps within 10 feet of the plants, and by sprinkling the diatomaceous earth around the plants to discourage the beetles.

Another natural control includes beneficial nematodes.  These can be purchased through several online catalogs including Planet Natural and Gardens Alive.

One trick many seasoned gardeners use is planting a trap plant nearby.  Two of the more desirable plants include nasturtiums and petunias.  When given a choice, the flea beetle will choose these two annuals over most other plants.  Once infested, remove the plants and discard them away from your garden.

Also, I would recommend covering your plants with reemay, otherwise sold as row covers, when they are very young.  Once they are established, they should be able to survive moderate infestations.  Reemay is a lightweight, fleece-like material which lets in water, sun, and fertilizer.  It is great for protecting your flowers and vegetables from harmful insects.  When using on vegetables, just be sure to remove the covering once the plant begin to flower.  This will allow the bees to pollinate the plants.

If all else fails, I recommend a combination of pyrethrum and rotenone.  These are sold as one solution or separately at most reputable garden centers or nurseries.  They are organic controls which are non-toxic to humans and pets.  Be sure to also apply it to the soil since that is where the beetles hide and rest between feedings.

Good luck, and write again if you more questions.

Regards,

Mike