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. Read this article to find out what you should know about the animals and how to deal with an infestation.
How do you recognize and combat spider mites on houseplants?
Spider mites on houseplants are small pests that leave fine webs on leaves and stems. They often occur in low humidity and warm temperatures. Home remedies such as lacewings, rapeseed oil or neem, as well as regular spraying of the plant with water are suitable for combating.
Different species
You can usually recognize spider mites by the delicate threads that they stretch around the plant. However, there are also species in which symptoms do not occur. In this case, it is important to pay attention to other abnormalities. Below we will tell you about the most important types and reveal how you can recognize an infestation.
Common spider mite (Tetranychus urticae)
- 0.5 mm tall
- brown or red body with spots
- visible to the naked eye
Fruit tree spider mite (Panonychus ulmi)
- 0.5 mm tall
- red body with white bristles
- only visible under the magnifying glass
- typical threads hardly appear
- primarily affects fruit trees
Orchid spider mite (Brevipalpus californicus)
- does not produce threads (false spider mite)
- 0, 1 mm in size
Tip
Color is hardly reliable when identifying species. Over 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
- matte color of the leaves
Tip
Sometimes the webs are so fine that you can't see them with the naked eye. Spray the plant with water to make the threads visible.
Causes and occurrence
Spider mites prefer warm locations with low humidity. The following houseplants are most likely to be present:
- Azaleas
- Hibiscus
- rubber tree
- different types of palm trees
- Cyprus grass
- Orchids
Fighting spider mites
A suitable location is the most effective protective measure against pests. Ensure there is sufficient humidity. by regularly spraying the houseplant with water. Alternatively, place a water bowl next to the plant.
Effective home remedies
The following home remedies have proven effective in the fight against spider mites:
- Beneficial insects (lacewings, parasitic wasps, gall midges)
- Rapeseed oil
- Nicotine
- Tea tree oil
- Neem
Tip
Although multiple applications of the home remedies above may be necessary, biological control is always preferable to chemical fungicides. Especially in the home, chemicals not only harm pests, but also your plants and your he alth.
