2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Bird cherry not only blooms very beautifully - the fruits of this wonderful tree bring great benefits to the body. That is why many summer residents willingly plant at least one single bird cherry tree on their plots. But when faced with the manifestations of various diseases, they sadly shrug their shoulders and absolutely do not know what to do. It's time to get acquainted with the information about what ailments the beautiful bird cherry is affected by and what their main symptoms look like
Red leaf spot
Round and rather large spots of bright red color begin to appear on bird cherry leaves. They are slightly convex on the lower sides of the leaves, and flat on the upper sides. Closer to autumn, all the spots gradually darken and acquire a characteristic brownish color. This harmful attack often becomes the cause of the premature fall of leaves and general oppression of plants.
Powdery mildew
Infected leaves of bird cherry are covered with a whitish bloom, which has a pronounced cobweb structure. At the very end of summer, this plaque gradually disappears, becoming inconspicuous, and the formation of point dark cleistotecia (in other words, fruit bodies) begins on it. By the way, the destructive fungus-causative agent of this unpleasant disease persists throughout the winter in the form of cleistothecia.
Fruit and flower pockets
An incredibly harmful and very common ailment. The most striking sign that the bird cherry is struck by it is the gradual coloring of the fruits in brownish tones. In addition, infected fruits become pointed closer to the tops, noticeably elongate, and sometimes even bend. And the seeds are never formed in them.
Outside, diseased fruits are covered with a waxy bloom, which consists of harmful spores of the pathogen. Flowers affected by this misfortune almost always die, not having time to set fruit. To a large extent, the development of this infection is favored by wet weather in spring and summer.
Cytosporosis
The main target for cytosporosis are the branches and trunks of bird cherry - the ill-fated ailment provokes their rapid drying. Tiny bumps (pycnidia) are clearly visible on the areas of the bark attacked by infection. When wet weather is established, clusters of conidia begin to stand out from these tubercles in the form of rather long reddish filaments. With their help, the pathogen fungus spreads to neighboring trees, and its preservation, as a rule, occurs in the bark of infected plants.
Coniothyroidism
Such an interesting name hides one of the varieties of spotting. By the way, it is characterized mainly by focal distribution, and it mainly covers the bark of branches and fruits with leaves. On the affected organs of the bird cherry, one can observe the appearance of numerous brownish or yellow necrosis surrounded by a reddish-brownish border. All of them have an irregularly rounded shape and can be either merging or single. And in the very center of these necrosis, you can find tiny mushroom pycnidia. The microscopic pycnospores contained in them contribute to the massive spread of infection when wet weather is established.
Rust
First, miniature brownish-red powdery urediniopustules form on the bird cherry leaves, and with the onset of autumn they are abundantly covered with brownish-crimson or purple teliopustules that look very unpleasant crusts and differ in angularity, irregular shape and characteristic glossy shine. If you do not start a timely fight against this scourge, most of the leaves will have to say goodbye.
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