Question: How to kill parasites
My bronzes Serissa is infested with little spiders. How do I go about eliminating them?
Answer: How to kill parasites
red spider mites are among the most difficult pests to find, because they are tiny, and can only be noticed with a magnifying glass; however, we note the typical characteristics of the infestation of these mites: the presence of very fine spider webs between the leaves and between the branches of the bonsai; very fine and widespread spots on the foliage, yellow or light green; rapid and inexorable decay of the leaf apparatus of our plants.
Being mites, they are essentially spiders, not insects; for this reason most of the insecticides have no effect on these unwanted guests; you must therefore use a specific acaricide, you will have no difficulty finding it in the nursery.
If you see small red spiders on your bonsai, they are beneficial mites, which feed on tiny harmful mites, and then let them live undisturbed on your plant.
The problem remains because the mites nestled among the leaves of your bonsai; in fact, these mites love a warm, very dry climate, and dry, spare air; therefore they are usually parasites that develop quickly in August, on garden plants, and even a simple summer storm causes the death of most of the specimens.
So I infer that your bonsai, not only has been attacked by mites, but is also clearly telling you that it lives in an excessively dry climate with no ventilation; if you keep it under these conditions, the chances of the problem recurring are very high.
So, before doing a treatment with an acaricide, try to take a nice shower to the plant, to wash away most of the spiders and their thin cobwebs; therefore remember to cultivate the bonsai with a greater quantity of water in the air: these conditions are easily obtained, vaporizing the plant with demineralized water, once a day or every two days; in addition to this, try to keep the bonsai in an area with good air exchange.
Unfortunately, the plants grown in the apartment often suffer from problems related to low environmental humidity, because the heating system and also the air conditioning system tend to dry the air very much; in addition to this the proximity to direct heat sources, such as radiators, fireplaces, stoves, air conditioners, fans, further worsens the situation.