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Diseases of the Blueberry plant

Diseases of the Blueberry plant


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Diseases of the Blueberry plant: fungal diseases, parasites and the most common diseases that attack blueberry cultivation.

Where to have talked at length about theblueberry cultivation (see dedicated paragraph for the articles onhow to grow blueberries), we will focus on what are the cures and treatments atillnessescommon ones that attack theblueberry plants. To learn more about its properties, we recommend reading the article "Blueberry: plant and properties

Diseases of the blueberry plant

Let's start with the fungal diseases and then move on to the most common parasites that infest the blueberry crops.

Blueberry, fungal diseases

To prevent the appearance offungal diseaseson the cultivation ofblueberrysimple strategies should be followed. Fungal diseases spread best in humid environments, when the plants are very close to each other, there is no good air exchange and the climate is hot and humid.

A good trick to do in the cultivation of blueberry in a protected environment, it consists in regulating the openings as best as possible to lower the humidity of the air.

Betweenfungal diseaseswhich most commonly attack iblueberriesfigure lagray mold. This mushroom overwinters in the twigs and small cracks in the stem. When the plant begins to vegetate, in the presence of humidity, this fungus infects the flowers and small fruits that begin to ripen. Suchfungal diseaseof blueberry is easily recognized because the fruits become covered with a typical mold and rot prematurely falling to the ground. For the treatment we recommend a good prevention with a bio antifungal. During infestations, collect and remove the affected fruits, even those that have fallen to the ground in order to limit the spread of spores.

Diseases of the blueberry plant

Cochineal is an insect that can severely damage themblueberry crops. This parasite completes two generations a year with births in the month of June and towards the end of August. Heavy infestations go on to trigger severalfungal diseases. To eliminate cochineal from blueberry crops, it is recommended to usewhite oil-80(allowed in organic farming) at the dose of 100 grams of product for every 10 liters of water. The treatment should be performed after the autumn leaves fall or just before the buds enlarge.

Useful link: White Oil.

Another very common infestation, especially in blueberry crops in the home orchard, is that of the fruit fly. This insect can lay 200-350 eggs per day at the rate of 6-7 spawnings per day! The insect damages the fruit when the new larvae hatch and destroy the fruit.

For prevention it is possible to cover theblueberry cropswith fine mesh protective nets (the net must have 0.8 mm meshes to prevent the fruit fly from reaching the blueberries to lay eggs)

To avoid the spread of this infestation it is important to destroy the fruits that have fallen on the ground. Those who do not intend to install a net can use fly traps. A set of 2 traps for flies and gnats is offered on Amazon at a price of 8.49 euros with free shipping.

The traps should be positioned close to the cultivation and filled to a third of the volume with a mixture of apple cider vinegar and water in equal parts, to the solution you will have to add 2-3 drops of liquid dish soap to lower the surface tension of the aqueous solution and facilitate the drowning of adult specimens.

The traps should be placed between the blueberry crops before the start of fruit ripening. A trap is required every 10 linear meters. It is recommended to hang them on a support at the height of the plants, in a shaded position and at the outer edges of the cultivation.

Blueberry cultivation

For instructions on how to grow blueberries, planting techniques, pruning to follow, the best varieties based on the climate, the need for cold and the ideal characteristics of the soil, we invite you to read our guides:

  • Grow blueberries
  • Blueberry cultivation
  • How to grow bilberries (also in pots)


Video: Blueberry Disease Management, Part 1: Cankers u0026 Stem Blights (August 2022).