The Four Common Diseases of Peony
This article provides a detailed introduction to the four common diseases of peony in the field of green plants and flowers. The following is a detailed explanation by the editor.
Now that we have finished discussing the basic care methods for peony, let's talk about the prevention and treatment methods for peony diseases and pests.
Common Diseases of Peony Flowers
During the cultivation of peony flowers, improper management can lead to many diseases, the most common being leaf spot disease, root rot, and (T-J) disease.
1. Prevention and Treatment of Peony Leaf Spot Disease
Peony leaf spot disease often occurs half a month after flowering, with the most severe period being mid-July.
In the early stage of the disease, black spots appear on the back of the leaves, with black edges, which gradually worsen to connect the lesions, causing the leaves to become scorched and fall off. This severely affects the photosynthesis of peony leaves.
If peony flowers show signs of leaf spot disease, fungicides such as carbendazim, mancozeb, and Bordeaux mixture should be sprayed first. These can be sprayed every 5-7 days, for a total of 3-4 times.
In rainy seasons, fungicides should also be sprayed after rain for prevention.
2. Prevention and Treatment of Peony Root Rot Disease
Peony flowers have fleshy roots and easily get root rot when the potting soil is waterlogged. Moreover, severe underground pests can also lead to root rot.
Root rot is quite fatal to peony flowers, causing the above-ground parts to weaken, leaves to turn yellow and red, and in severe cases, leaves and branches to wither.
Prevention is more important than treatment for peony root rot. The soil and peony roots should be disinfected when potting. Methyl thiophanate can be mixed with soil or an 800-fold solution can be used to soak the roots. At the same time, insecticides should be mixed into the soil to prevent underground pests.
Water management should be controlled to prevent waterlogging.
3. Prevention and Treatment of Peony (T-J) Disease
Peony (T-J) disease is most likely to occur in hot and humid seasons. Infected peony leaves will show necrotic spots, and as the disease progresses, the spots will gradually connect and the stems will become twisted, with the tender branches drying up.
In the early stage of (T-J) disease, mancozeb can be used for spraying treatment. Generally, it should be applied once every 5-7 days, and 2-3 treatments are usually sufficient to cure the disease.
4. Prevention and Treatment of Peony Grey Mold Disease
Grey mold disease is also a common disease of peony, most likely to occur in warm and humid seasons. It is most harmful to seedlings, causing lodging and withering.
In the early stage of grey mold disease, affected leaves show deep green water-soaked spots at the tips and edges, similar to scalding, and then gradually spread to the inside of the leaves. When the humidity is high, it can cause brown rot spots on the leaves, covered with grey moldy matter.
When humidity is low, the affected areas turn brown or light brown and become dry.
Prevention of grey mold disease should include increasing the application of phosphorus and potassium fertilizers and strengthening ventilation, as well as controlling the amount of watering. After the disease occurs, methyl thiophanate can be used for spraying treatment, once a week, and 2-3 treatments can cure the disease.
Peony diseases are not scary as long as prevention is done well, and timely detection and treatment are carried out for better control. Of course, there are more than just these four diseases. Tomorrow, we will continue to discuss other diseases. Stay tuned.
The introduction of the common four diseases of peony that can lead to withering provided by the Green Enthusiast Network [www.lvzhimi.com] is hoped to be helpful to you!