2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Garden blueberries appear on our plots more and more often, but before it could only be found in the forests! True, she looks somewhat different than her wild-growing companion: the bushes of garden blueberries are usually much taller, and the berries are larger. Growing this amazing berry is a real pleasure! And in order to protect it from possible ailments, it is necessary to find out what their manifestations look like on this beautiful plant
Mummification of berries
The harmful fungus-causative agent of this disease attacks young stems with inflorescences, actively infecting their tissues and leading to their rapid wilting, blackening and death. And some time later, destructive spores begin to infect the berries. Infected berries gradually dry out and fall to the ground. And inside the mummified berries, harmful spores overwinter.
Anthracnose
This attack mainly affects the berries, but from time to time you can meet the branches affected by it. Fungal spores spread mainly in rainy weather.
Affected garden blueberry inflorescences turn brown or turn black, and its fruits noticeably soften. Diseased fruits are characterized by a bright pink color (due to the huge number of fungal spores). Young infected stems gradually die off, which in turn leads to brown wilting of the leaves.
Overripe berries hanging on branches for a long time are especially susceptible to anthracnose.
Gray rot
This disease affects mainly ripe fruits, however, under especially favorable conditions, wood can also be affected. On the decaying berries, a characteristic grayish fluff is clearly visible - this is how the mushroom mycelium looks like.
The pathogen fungus overwinters on dead, diseased and weakened branches, as well as in the soil. Gray rot is especially damaging during prolonged wet and cool periods. Most often, this infection manifests itself on plants overfed with nitrogen and in overly thickened plantings with poor air circulation.
Coccomycosis
Tiny specks with a diameter of 0.5 - 2 mm are formed on the leaves of garden blueberries. They can be either brownish or reddish-brownish. Initially, all the spots are separated from each other, and after some time they begin to merge. And on the undersides of the leaves, just under the spots, a slightly pinkish or whitish bloom of fungal sporulation appears. In case of severe damage, berry bushes often shed up to 80% of the leaves, and this happens already at the end of July.
On fruits (most often late-ripening varieties), depressed brownish specks are formed, densely covered with an unpleasant whitish bloom. Such fruits are characterized by underdevelopment, tastelessness and light red color. Often, infected berries dry out. Weakened plants and wet weather create the most fertile soil for the development of coccomycosis.
Stem cancer
Small reddish spots appear in the areas of blueberry leaf ribs. Gradually growing, they acquire an oval shape and chestnut-brownish color. Then the specks merge with each other, quickly ringing the shoots and causing them to die off. And on old shoots, slowly expanding ulcers, covered with exfoliating bark, form. At the same time, the leaves of infected blueberries are distinguished by a bright reddish-brownish color.
Phomopsis
Phomopsis is a drying out of branches, the manifestations of which have an outward resemblance to stem cancer. When this disease is affected, the tops of young shoots begin to dry out and twist. Withering leaves gradually turn brown, and reddish specks reaching one centimeter in diameter begin to appear on them. The bark in the infected areas also turns brown, gradually sinks and looks like it has received a sunburn.
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