Bizarre threads on the stems and leaves of a houseplant indicate spider mites. The pests are not to be trifled with, as they will sooner or later lead to the death of the plant. In this article you can read what you should know about the animals and how to prevent an infestation.
Spider mites are easily recognized by their spider web-like threads
Different types
You can usually recognize spider mites by the delicate threads that they stretch around the plant. However, there are also species in which the symptoms are absent. In this case, it is important to pay attention to other abnormalities. In the following, we will explain the most important types to you and tell you how you can recognize an infestation.
Common spider mite (Tetranychus urticae)
- 0.5mm in size
- brown or red body with spots
- visible to the naked eye
Fruit tree spider mite (Panonychus ulmi)
- 0.5mm in size
- red body with white bristles
- only visible under a magnifying glass
- typical threads hardly appear
- mainly affects fruit trees
Orchid spider mite (Brevipalpus californicus)
- does not produce threads (false spider mite)
- 0.1mm in size
tips
Color is not very reliable for species identification. Over the course of the seasons, this can vary from orange to red to brown.
Damage to the plant
- delicate, cobweb-like threads on the leaves
- white leaf spots
- dull color of the leaves
tips
Sometimes the webs are so fine that you cannot see them with the naked eye. Spray the plant with water to reveal the filaments.
causes and occurrence
Spider mites prefer warm locations with low humidity. It is very likely to occur on the following indoor plants:
- azaleas
- hibiscus
- rubber tree
- different palm species
- Cyprus grass
- orchids
Fight spider mites
A suitable location is the most effective protective measure against the pests. Make sure there is sufficient humidity. by regularly spraying the houseplant with water. Alternatively, place a bowl of water next to the plant.
Effective home remedies
The following home remedies have proven themselves in the fight against spider mites:
- Beneficial insects (lacewings, parasitic wasps,(22.99€) gall midges)
- rapeseed oil
- nicotine
- tea tree oil
- neem
tips
Although multiple applications of the above home remedies may be necessary, biological control is always preferable to chemical fungicides. Especially in the home, chemicals not only harm the pests, but also your plants and your health.