Grass is a relatively resistant plant, unlike other plants in the garden. But it does happen that she also gets sick. In this case, one can generally observe spots, usually red or gray, on the lawn. You must act quickly to prevent the damage from spreading over the entire lawn!
Rust is characterized by the appearance of orange, yellow, white or even black pustules covering the blades of grass. The lawn then takes a orange-yellow shade easily recognizable.
Usually seen in the spring and summer, this disease is actually due to… a mushroom † The arrival of dew allows this parasitic fungus to develop and dry out the leaves at the same time.
To eliminate this unwanted and restore your lawn to its former glory, sprinkle it with comfrey fertilizer† In addition, do not hesitate to spray nettle fertilizer or a decoction of horsetail on your lawn. If nothing helps, cut and burn the affected leaves.
2) Fusarium wilt
Fusarium wilt is a disease caused by a fungus that generally develops in warm weather, associated with humidity. And it is not without reason that the appearance is due to poor soil aeration. It is characterized by the formation of round grayish spots on certain areas of the lawn.
This disease is particularly difficult to treat. Prevention is therefore the best solution. Cut and burn diseased leaves if infected.
3) The common thread
Red thread disease gets its name from the appearance of grass leaves. In fact, the latter wither until they gradually resemble reddish colored wires† The origin of this disease is again a parasitic fungus, which develops in hot and humid weather.
For this reason it is better in summer and autumn reduce watering of your lawn† And don’t forget to pick up the grass clippings after mowing, as well as other plant debris. And if, despite everything, the disease does appear, tear off the affected areas and re-grass your lawn.
Helminthosporiosis is a disease caused by a fungus and characterized by the appearance of long brown stripes on the blades of grass. It mainly occurs in spring and summer.
To treat it, a low nitrogen fertilization is necessary.
5) Powdery Mildew
Again, these are fungi that form whitish spots on the lawn. However, powdery mildew is a disease that only occurs grass leaves not exposed to the sun†
So, if you have a shady lawn, remember to mow it regularly, but never shave it. In addition, avoid watering during the hottest part of the day, preferably in the morning or evening.
6) Witch Rings
The witch circles are manifested by: white mushroom circles that appear on your lawn. The nitrogen released by the fungi often makes the grass appear greener in the center of the circle.
To get rid of these fungi, there is only one solution: remove the soil from the affected areas to a depth of at least 25 cm and reseed the lawn. Indeed, these fungi are generally deep rooted† Otherwise, keep in mind that they normally disappear on their own within a few years…