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Irises have long become permanent residents of our gardens. These handsome people are quite unpretentious, but periodically the gardeners are upset by the diseases of irises and the struggle with them takes a lot of time and effort.
The more sophisticated the plant variety, the more it is susceptible to diseases. The most common and common varieties have greater immunity. Below we will look at what diseases irises can have, how to prevent them and what to do if the plant gets sick.
Illnesses of irises and their treatment
In comparison with other perennial plants, irises are less susceptible to various diseases, but still not protected from them by 100%.
Flower beds, fungal, viral and bacterial diseases can be rampant. An experienced gardener should be able to distinguish between them and treat.
As a preventive measure, spraying with a Bordeaux mixture before and after flowering.
For the convenience of the disease are listed below in alphabetical order.
This virus belongs to the fungus.
Symptoms: the edges of the leaves begin to become covered with a black coating and die.
What to do: unfortunately, the plant will have to be removed. The virus spreads not only through contact, but also through the soil. After the plant was removed, it is necessary to treat the soil with a Bordeaux mixture.
Ascochitis or leaf blotch
Also a fungal disease.
Symptoms: watery spots of brown appear on the edges of the leaves. The foliage begins to dry.
What to do: medications with copper content will help to overcome diseases. It should be noted that the disease remains both in the ground and in all parts of the plant. The method is suitable for any kind of patchiness of irises.
Infection develops rapidly during a rainy summer. Moisture and heat only contribute to the deterioration of the plant.
Symptoms: starting from the lower, the leaves begin to gradually die off. White-gray spots become the harbinger, which gradually increase in size. The disease goes to all the leaves and eventually kills the plant.
What to do: it is necessary to permanently remove and dispose of affected areas of the plant.
Processing of irises is necessary means containing zinc and copper.
Here, the omnipresent aphid becomes the carrier.
Symptoms:small stripes and spots on the leaves.
What to do: a remedy able to cure this infection has not yet been found.
Here, attention should be paid to prevention. It is necessary to struggle relentlessly with aphids and immediately remove infected plants.
Fungal disease, the spores of which remain and develop in leaves and ground.
Symptoms: the leaves begin to dry gradually, curl. Acquire a brown color.
What to do:sulfuric solution every 2 weeks.
For prevention, you need to keep irises in the same place for 3-4 years. It also requires quality drainage.
Wet rot or bacteriosis
It appears early in the spring, refers to bacterial diseases.
Symptoms: brown spots on the tips of the leaves. Subsequent drying. There is a smell of rot at the base.
What to do: infected tissues need to be cut to healthy. Treat with potassium permanganate.
Always remove the affected leaves and plant remains in the fall.
Fungal disease, is activated at high humidity.
Symptoms: the stems and tips of the leaves rot and are covered with a touch of gray. Tuber plants also suffer.
What to do:do not fill the plants, even temporarily stop watering. Remove infected parts of irises, do not leave them on the site.
Dry rot or fusariosis
Symptoms: the infection begins with the rhizome and gradually clogs all the channels. Leaves quickly fade, the plant dies.
What to do:destroy or take out the dead plant. Treat neighboring plants with fungicides, and place the growth of the deceased with copper chloride.
During flowering spraying can not be done!
The most important thing in the fight against diseases is the prevention and adherence to agricultural technology. Beautiful and healthy plants for you!