Delphinium is a fairly common annual herbaceous garden crop that is widely used in the design of flower beds and flower beds. Lush bright green foliage, spike-shaped inflorescences from small flowers of an original form, many varieties and hybrids with a variety of shades of flowers - real beauty! However, like other decorative garden crops growing outdoors, this plant has its own problems: delphinium diseases, as well as pests, can significantly spoil the appearance of the planting and even lead to the death of flowers. But, being armed with the necessary knowledge, you can always prevent the disease or, if it is already there, successfully fight. Let's talk about the main ailments and pests that most often affect the delphinium.
Fungal Delphinium Disease
Ailments caused by pathogenic fungi and bacteria most often affect the stems and leaves of plants. Usually this happens due to excessive humidity in cool weather, as well as when the dolphinium is too thick and the air circulates in the thick vegetation.
Powdery mildew
A clear sign of this delphinium disease is the appearance of a grayish-white plaque on the leaves, their petioles, stems, and then the flowers of the plant, as a result of which the affected areas coagulate, turn brown and die. If you do not take measures, then one plant will die first, and then the whole planting. Powdery mildew can be prevented by thinning out areas planted with delphinium and removing extra shoots. If the disease has already appeared, spraying the bushes with foundationazole or the Topaz antifungal agent will help. From folk remedies, spraying with a copper-soap solution and pollination of crushed sulfur with previously moistened bushes are quite effective.
Ramulariosis
Evidence of the appearance of this fungal disease of the delphinium is the spread of brown spots on the leaves of the plant - lighter in the center and with a dark rim at the edges. With an increase in the number of lesions, the leaves dry out and die. Treatment is carried out by treating diseased plants with any antifungal drug. The causative agent of the disease is preserved in dead plant debris, so they must be collected and destroyed.
We treat delphinium: bacterial and viral diseases
Black spotting
This disease of the delphinium is manifested in the spread of dark spots throughout the plant from bottom to top, as a result of which the affected leaves, stems and flowers die and break off. If you do not start the disease, then the delphiniums can still be saved by spraying them several times with a tetracycline solution at the rate of 1 tablet per 1 liter of water. As in the case of fungal diseases, it is imperative to destroy the dead remains of the affected plants.
Ring spotting
With the defeat of these diseases, concentric yellow spots quickly spread through the bushes of the delphinium. The most effective method of treatment is culling and destroying infected bushes, as well as processing the rest of the planting of karbofos, actar, spark and other similar compounds.
Pests
The most dangerous pests for delphinium are flies, aphids, ticks and caterpillars. They settle on the leaves and flowers of plants, feed on their parts, preventing them from developing normally. You can fight them. And you even need to, spraying the bushes of the dolphinium with insecticides, regularly inspecting the plantings and collecting larger pests, setting traps for separate species (for example, containers with “bleach” against slugs).
These ailments most often affect both the annual delphinium and the long-term delphinium. Photos illustrating this article clearly show how the appearance of healthy and diseased plants is strikingly different. And what will be more on your personal plot depends on you!