2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Peony rust attacks beautiful flowers mainly in the middle lane and in the northern regions of Russia. Its first signs can often be observed after flowering, closer to mid-summer. In the event that environmental conditions are favorable for the development of a harmful scourge, it can spread in just a couple of days. Warm and humid weather is especially favorable for the comfortable development of the pathogen - when it is established, an intensive spread of infection occurs, and already in July the leaves begin to dry out, and the growing season is noticeably reduced, as a result of which the peonies are greatly weakened and the next year they can no longer boast of excellent winter hardiness and lush flowering
A few words about the disease
On the upper sides of the rusty peony leaves, the formation of yellowish-brownish, brownish or brownish spots with a slight purple tint begins. Sometimes, bright brown edges can be seen around the spots. And on the undersides of the infected leaves, tiny orange or yellowish-brownish uredopustule pads appear. They contain fungal spores, which are easily carried by the wind, which in turn leads to further infection of the peonies.
Toward the end of summer, horn-like curved yellowish-brownish columns of teliospores are formed among the pads of the urediospores. They cover the undersides of the leaves with a solid, causing the leaves to curl and dry out.
With the onset of autumn, the teliospores germinate, in turn, in basidia filled with basidiospores. The pathogen of this species infects the intermediate host of the infection - pine (Crimean and common). As a rule, it remains and overwinters on these trees in the form of mycelium, and the trees themselves turn into a perennial source of infection. In spring, on the branches, as well as on the bark of their trunks, swellings of yellowish-red shades appear (the so-called aecidial stage of the pathogen), which break out after some time. Infected twigs become bent, noticeably thicken and begin to die off slowly. And closer to the middle of summer, ripe ecidiospores fall on the delicate leaves of peonies and infect them. Subsequently, they are transformed into telithospores, which will overwinter on fallen leaves.
It is noteworthy that rust does not affect the roots of peonies - it affects only leaves of beautiful flowers.
How to fight
When growing peonies, it is best to select the varieties that are most resistant to rust. Such varieties as Varenka, Bely Parus, Arkady Gaidar and some others are very resistant to this unfortunate ailment.
Peonies should be planted as far as possible from the intermediate hosts of the rust pathogen (that is, from the pine). It is also important to ensure that the plantings are not overly thickened. You should also periodically inspect the peony bushes for rust damage. The infected leaves are immediately collected and burned.
For preventive purposes, peonies are treated with Topaz. As soon as the first signs of infection are found, they begin to use such copper-containing products as Oxyhom, Hom, Bordeaux mixture and copper sulfate. It is also allowed to use 1% colloidal sulfur and copper-soap solution.
When carrying out treatments, the main attention should be paid to the lower sides of the leaves - it is there that the stomata are located, which serve as conductors for the fungus to enter the plants. Such treatments are repeated every two to three weeks, or as the solutions are washed off by rains. On average, two or three treatments are quite enough per season.
In addition to processing, it is advisable to systematically feed peonies with high-quality phosphorus-potassium fertilizers - this will increase their resistance to various unwanted infections.
Recommended:
How To Remove Rust From An Ax?
Axes, just like any other gardening tool, also tend to rust from time to time - especially often when they are not stored properly. However, do not rush to throw away the rusted tool - it is quite possible to clean almost any ax of rust and safely continue to use it further! How can this be done, and how difficult is it?
Mallow Rust
Rust is one of the most harmful and widespread diseases of beautiful mallow. Rust is especially common in the second half of the growing season. True, in some years, the manifestation of this unfortunate misfortune can be observed already in the third decade of May (most often this occurs in the Ukrainian forest-steppe). The second year mallow is most affected. If you do not start to fight rust in time, you will obviously not have to rejoice in beautiful flowers for a long time
How To Get Rid Of Rust On Garden Tools?
Not a single summer resident can do without good garden tools. If you learn to take care of him properly, he can serve for more than a dozen years! And if you neglect proper care, then under the influence of various atmospheric phenomena, garden tools can easily become rusty. However, coping with it is also quite realistic, the main thing is to know how exactly this can be done! And this can be done in several different ways
Gooseberry And Currant Goblet Rust
Gooseberry rust affects gooseberries and currants the most. Initially, it develops on sedge, on which the pathogen fungus overwinters, and from which spores are subsequently transferred by the wind to gooseberries and currants. With a sufficiently strong lesion with this ailment, half (or even more) of the berries often fall off, and the shrubs themselves lose from 40 to 78 percent of the leaves
Rose Rust
Rose Rust is an incredibly contagious attack that spreads at lightning speed and greatly weakens luxurious rose bushes. The roses attacked by it stop blooming and shed most of the leaves. Bringing rust into the garden will not be difficult, but getting rid of it will be extremely difficult. Often it is this unfortunate ailment that causes the rapid death of roses. It is much easier to prevent it from occurring than to try to get rid of it later
