These diseases often affect him

Powdery mildew

In hot dry weather feels like powdery mildew on leaves, shoots and flowers. The fungal attack is shown by a white coating reminiscent of flour.

Spider mites

At first there are silvery-light speckles on the leaves; later the leaves turn yellow and the plants look like they are covered with a fine web, which is particularly evident on the undersides of the leaves. Hardly visible mites suck out the plant cells, whereby the arachnids mainly appear in dry air and warm weather. As a preventive measure, you should definitely have one Over-fertilization with nitrogen avoid.

Leaf miners

An infestation with leaf miner flies is shown by conspicuously winding, silvery feeding tunnels in and white spots on the leaves. The sap-sucking leaf miner lays its eggs in the leaf tissue; the larvae eat their way through the leaves and pupate there. Chemical control is usually not necessary, just remove the infected leaves.

Rust fungi

If the upper sides of the leaves turn yellow to rust-brown in color from early summer, then there is probably a rust fungus infestation. The initially small spots change later to brownish, reddish or orange-colored pustules. Rust fungi occur mainly in damp weather after it has rained for a long period of time. For prevention, spray several times with fungicides or an infusion of yarrow.

Root rot

It is true that the delphinium must, especially in dry periods poured 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 are particularly comfortable in wet and compacted soil. The first signs are usually shown by the shoot tips turning brown.

Tips & Tricks

However, are Symptoms of damage are not always can be traced back to diseases or pests. They also result from improper or inadequate nutrition as well as errors in the choice of location.