Content
- Annoying troublemakers - these pests infest the elm
- The most common pests of elm
- The bile mite
- The bladder louse
- The Ulmenschildlaus
The bladder louse causes ugly bile
Annoying troublemakers - these pests infest the elm
Do you maintain your elm conscientiously, do you water regularly and do you provide a nutrient-rich substrate with a suitable fertilizer? Nevertheless, the tree does not seem to thank you for your actions? Your elm may suffer from a pest infestation in this case. Check your plant for the following pests.
The most common pests of elm
The elm is mainly attacked by three pests:
The bile mite
Infestation of the gall mite can be determined relatively easily. On the leaves of whole branches of the branches, there are clearly nodules that are reminiscent of a toad skin. In case of minor infestation, the elm only passively damages, becoming more susceptible to external factors such as weather and other diseases. However, their growth is not affected. To remove the bile mite it is recommended to remove the affected leaves immediately.
The bladder louse
The bladder louse looks superficially home in field and mountain elm. The pests settle on the underside of the leaf. On the upper side of the leaf, they produce conspicuous bile, which at the beginning have a rich green color. Only in the course of summer the pustules turn yellow before they turn brownish in the autumn and finally dry up. The gallbladder causes no significant damage, but attracts ants and makes the leaves dress look unaesthetic. In the summer he even flies out and attacks surrounding grasses. But once he has picked an elm, he returns to the oviposition again and again. Again, you should remove affected leaves.
The Ulmenschildlaus
An infestation by the Ulmenschildlaus you recognize by a wreath of wax threads, which you will find mostly on young shoots. It almost looks like there are little snowflakes on the wood. You rid your elm of the pest with a legally approved control.