Fungal diseases in the ornamental garden - the 3 most common diseases at a glance

Fungal diseases such as monilia or rust can affect the trees in the ornamental garden quite strongly. We'll get to the bottom of a few examples here.

The most common plant diseases that occur in the garden come from fungal infections and are transmitted by spores. In most cases, the infection is only recognized when the leaves are stained or perforated. Wilted shoots can also be an indication of a fungal infection.

Wind, insects or splashes of rain primarily transmit the pathogens. A moist location favors the development of the fungus and can cause immense damage to its ornamental trees.

In the following we would like to inform you about fungal diseases in the ornamental garden and introduce chronological control methods.

Common fungal diseases on ornamental shrubs

Monilia-tip burn

I.Sáček, senior -

The Monilia drought is a common fungal disease in the garden. This affects cherries in particular, but also other fruit trees. Even ornamental trees are attacked by this disease.

For example, this fungus causes wilting of forsythia or drought on almond trees and ornamental quinces.

" Tip: Take a look at the new shoots of your trees in spring. You recognize this disease during flowering or shortly after. The new shoots wither and wilt after a few days.

The mushroom overwinters on the dead shoots on the ornamental tree. These mushrooms form spores before they bloom in spring. Wind and insects transmit these pathogens to flowers that are just opening.


January and February:March and April:May and June:
Cut out dry, dry shoots from the previous year.Spray fungicide like Compo 17785 Duaxo Universal Mushroom-Free or Fruit-Mushroom-Free Teldor 2 to 4 times to cut.Cut out diseased new shoots.

Column grate on ornamental currant and pine blister grate

Marek Argent - via Wikimedia Commons

Not only can currants in the ornamental and orchard be infected by this fungus, five-needle pine species can also be affected. It is one and the same pathogen that causes the columnar rust on currants and the pine blister rust. They infect each other in close proximity.

  1. Spindle-shaped swellings form on the shoots of five-needle pine species. In spring, when the weather is damp, 2 to 5 millimeter bubble-shaped mushroom structures break out of them. The countless fungal spores of the pine blister rust are transferred to the currants by the wind.
  2. You will see the first spore deposits of the fungus on the underside of the currant leaf about two weeks after the infection. The infestation rapidly spreads to the currant.
    In August / September, orange to brownish, thread-like "pillars" of the mushroom covered the underside of the currant. The next form of the fungal spores is formed, with which the five-needle pine species are then infected again.
January to May:June and July:in the aftermath:
In the case of severe infestation Zierjohannisbeere Spray with CELAFLOR® Vegetable-Mushroom Free Polyram® WG from May before flowering and after flowering.Fallen fungi Currant leaves collect and discard.
Infested shoots of five-needle pine species remove.Pine trees remove from the garden.

Juniper rust / pear rust

H. Krisp - via Wikimedia Commons

Juniper rust is a noticeable fungal disease. Sade juniper, red cedar juniper and specimens of flat-growing species such as the Chinese juniper are attacked by these rust fungi. The same mushroom also causes the pear grate. On the one hand it needs the juniper as a host plant and on the other hand the juniper rust the pear. This is how the interplay takes place periodically:

  1. The mushroom hibernates in the juniper shoots. In March / April, brown, bubble-like spore beds break out of the thickened shoots. When it rains, they soften into a glue-like spore mass that insects transfer to the pear leaves. When dry, the spores are carried by the wind onto the pear leaves.
  2. Around 14 days after infection, shiny orange spots develop on the top of the leaf, in the middle of which punctiform, sticky pustules form. The mushroom grows through to the underside of the leaf. In July / August it forms bulbous warts at this point, in which the spores are located and are later thrown out. These fungal spores then infect the juniper
January to AprilMay to July:in the aftermath:
juniper plant remove from the garden.In case of infestation pear leaves spray with a fungid like Compo 17785 Duaxo Universal fungus-free. "Newly infested juniper remove from the garden.