From the soil, for example, “small black flies” may emerge. These are fungus gnats, which indicate that the plant ís standing too wet. Check the water drainage of the plant container and reduce the watering quantity. Small insects hopping away, so-called springtails, indicate very moist potting soil. The above-mentioned information also applies in this case. You can also catch the animals by cutting a small potato in half and hollowing out the halves. Place the halves on the pot substrate with their cut surfaces facing downwards. The springtails will enter the potato halves and together with these can be disposed of on the compost or in the biowaste bin.
If, on the other hand, ants have populated a root ball, the opposite reaction applies: completely immerse the root ball for approximately half an hour in a bucket of water in order to drown the ants. Then allow the root ball to dry out thoroughly.
Pick off snails from pot and tub plants. In locations at risk from snails, you can also put down environmentally-friendly snail bait (active agent e.g. iron-III-phosphate). You can make it difficult for the snails to access the pot by turning over a saucer which is larger than the plant pot, placing it on a brick or a block of wood and placing the tub plant on this construction. Ensure that the plant stands firmly!
You can combat pests on the plant in a summer garden, such as greenfly, mealy bugs and scale insects, relatively easily by spraying regularly with an environmentally friendly potassium soap or oil preparation from a specialised dealer. There you can also obtain chemical pesticides, which you can pour or insert in the moist pot soil as sticks. With both options, the plant absorbs the poison via its roots and distributes it in its plant tissue, from where it absorbs the pests.
Due to the special effect of these pesticides, they are not suitable for all edible pot and tub plants (such as herbs, citrus plants, figs)!
Tip: Whitefly (Bemisia tabaci) have their favourites. They particularly like to inhabit angel’s trumpet and fuchsia, aubergines and tomatoes. If you therefore cultivate these plants, ensure that they do not mutually infect each other if populated by the insect!