Content
- Delphinium very susceptible to various diseases
- Powdery mildew
- spider mites
- leafminers
- rusts
- root rot
- Tips & Tricks
Larkspur is used as a medicinal plant, but can also be affected by diseases
Delphinium very susceptible to various diseases
Unfortunately, the magnificent Delphinium (Latin: Delphinium) is very susceptible to various diseases, which spoils the pleasure of the beautiful flowers again and again. We will introduce you to the most frequent damage pictures at this point.
Powdery mildew
In hot, dry weather, powdery mildew feels very well on leaves, shoots and flowers. The fungal infection is shown by a white, reminiscent of flour topping.
spider mites
The leaves are initially silvery-bright speckles; later the leaves turn yellow and the plants appear covered with a fine web, which is mainly visible on the undersides of the leaves. Barely visible mites absorb the plant cells, the arachnids occur especially in dry air and warm weather. To prevent it, you should absolutely avoid over-fertilization with nitrogen.
leafminers
An infestation with Minierfliegen shows itself by conspicuously serpent, silvery feeding courses in as well as white points on the sheets. The plant sap sucking leaf fly lays its eggs in the leaf tissue; the larvae eat their way through the leaves and pupate there. Chemical control is usually not necessary, remove only infected leaves.
rusts
If the top of the leaves turns yellow to rusty brown from early summer, then there is probably a rust fungus attack. The initially small patches later turn into brownish, reddish or orange pustules. Rust mushrooms occur especially in damp weather, if it has been raining continuously for a long time. For prevention, spray several times with fungicides or an infusion of yarrow.
root rot
Although, especially in dry periods, the delphinium must be watered regularly, but waterlogging should be better prevented. This inevitably leads to root rot and thus to the death of the plant. Root rot is caused by various fungi that feel particularly comfortable in wet and compact soil. First signs are usually shown by brown-colored shoot tips.
Tips & Tricks
However, damage symptoms are not always due to illness or pest infestation. They also result from improper or poor nutrition and mistakes in locating.