Content
- Brown leaves on the lilac - Why is it?
- Lilac is prone to fungal diseases
- Brown spots often come from the Fliederminiermotte
- Tips
Brown leaves are often an indication of a fungal disease
Brown leaves on the lilac - Why is it?
For many hundreds of years, the robust lilac (Syringa vulgaris) has been growing and thriving in gardens and pots here in Germany. The shrub or small tree is considered to be little susceptible to disease and easy care - but you must be especially careful with mushrooms, especially after unfavorable weather or a wrong cut threatens a fungicidal infection.
Lilac is prone to fungal diseases
Fungi in particular are struggling with the lilac, which is susceptible in this respect: an infection may be prone to severe pruning if the fresh wounds can not close fast enough or if the cutting tool has not been disinfected before use. But too humid a location (perhaps also with strongly compacted earth), damp weather, winter strong frost or a strongly nitrogen-fertilized fertilization can promote the penetration and growth of mushrooms. Brown leaves mainly cause these pathogens:
For both causers only a strong pruning helps deep into healthy wood. Cut only with disinfected tools on a dry, frost-free and warm day.
Brown spots often come from the Fliederminiermotte
The Fliederminiermotte or lilac moth (Gracillaria syringella or Caloptilia syringella) occurs not only on the lilac, but also on other woody plants. An infestation is due to the feeding on the leaves, which are colored black and irregular, on. If you look closely, caterpillars should also be visible in early summer. Later the leaves dry up and fall off. A fight is mainly in leaf shoots possible, then you should spray the lilac several times with Neem.
Tips
If you cultivate your lilac in a bucket, you should cut it not only above ground every two years: the roots also need a pruning by about one third. Otherwise, the plant soon no longer has sufficient space in the tub and acknowledges this with a mickerigen growth, lack of flowering and brown leaves.