Brown strawberry spotting: methods of struggle


The disease of strawberry brown spot develops when non-compliance with the rules of planting and caring for plants. The causative agent of the disease prefers thick plantings and high humidity. To combat brown spot developed special drugs. In addition to these, traditional methods are used that have good efficiency at low cost.

Signs of disease

Brown spotting has the following characteristics:

  • the appearance of light spots on the leaves and peduncles, darkening with time;
  • the presence of brown deposits on the back of the leaves;
  • the number of specks increases over time;
  • drying of foliage.

The cause of stains is high humidity. The spread of the disease is carried out by spores of the fungus.

The disease can kill half a strawberry crop. The spotting does not extend to berries and stalks; however, they lack nutrition due to the disruption of the photosynthesis process.

Chemical methods

To combat brown spot effective means based on copper. It is necessary to use drugs strictly according to the instruction. The first treatment is carried out as a preventive measure in early spring. Some tools are allowed to use during flowering. All treatments are stopped a few weeks before harvest.


To combat brown spot, special tools have been developed that have copper in them. When processing strawberries, such preparations are used with caution to avoid their accumulation in the berries.

Important! Fungicide treatment stops when the fruit grows (one month before harvest).

The first procedure is performed in early spring before the flowering of strawberries. The treatment is then repeated after two weeks. Additional procedure is carried out in the autumn after harvest.

The following fungicides are used to combat the disease:

  • Ordan - contains in the composition of copper oxychloride, which has a detrimental effect on fungal spores. The components of the drug penetrate into the deep layers of plants, where they destroy lesions and restore plant tissue. 25 g of Ordan is diluted with 5 liters of water. The procedure is carried out twice with a break of 7 days.
  • Coside is a drug based on copper, which is retained on the surface of the leaves and does not prevent the penetration of the fungus. During the season, spend no more than 4 treatments of strawberries. The protective properties of KOISIDE are maintained for 14 days after spraying.
  • Oxyhom is a fungicide capable of penetrating plant tissue and reducing fungal activity. Oxyh is allowed to apply during the growing season. At 10 liters of solution enough 20 g of powder. Between the procedures should pass from 9 days.
  • Ridomil - a tool that can effectively deal with spotting and other pathogens. To prepare a solution of 25 g of the drug is diluted in 10 liters of water. Ridomil is used during the growing season of strawberries two weeks before picking berries. During the season, no more than three treatments are allowed.
  • Horus is a fungicide that gives protective and curative effects. The drug is effective in spring and summer. Horus fights fungal diseases even at low temperatures. The tool is most effective when handling young landings. For 10 liters of water, 2 g of this fungicide is sufficient.
  • Fitosporin is an effective drug with low toxicity. It is allowed to apply at any stage of strawberry development. Phytosporin is diluted with water in the ratio of 1:20, after which the plants are sprayed. The procedure is repeated after 10 days. With a high degree of damage is taken concentration of the drug 1: 2.

Bordeaux mixture

An effective remedy for spotting is Bordeaux liquid. For its preparation requires copper sulphate and quicklime. Components are diluted in separate containers.

Tip! For work will require glass or plastic utensils.

First, the bluestone is diluted with a small amount of hot water, then cold water is added to obtain a volume of 5 liters. Lime should be diluted with cold water of 5 liters. Then the bluestone is carefully poured into the resulting milk of lime.

Important! For processing strawberry requires 1% solution. To do this, take 0.1 kg of sulphate and 0.15 kg of lime.

Processing Bordeaux fluid is performed in early spring. The procedure is repeated after collecting the berries. When working with components, care must be taken to prevent them from falling on the skin and mucous membranes.

Chlorine oxide

Copper oxychloride is an effective means of controlling pathogens of fungal diseases. Based on it, many drugs have been developed - Blitoks, Zoltozan, Kupritoks and others.

The substance has the appearance of green crystals, resistant to the effects of the sun, humidity and high temperatures. The tool is used for the prevention of strawberry brown spot. Chloroxide has similar properties as Bordeaux liquid, but it is easy to prepare.

Important! Chloroxide is not phytotoxic to strawberries; however, it causes leaf burn in large quantities.

During the season, no more than three strawberry treatments are performed. The last procedure is carried out 20 days before picking strawberries. Between treatments takes up to 14 days.

To prepare the solution requires 40 g of oxychloride and 10 liters of water. Processing is performed by spraying. The substance has no side effects for plants, however, requires the use of gloves and other means of protection.

Copper sulfate

Copper sulfate has the form of powder or blue crystals. The substance is used to prepare Bordeaux mixture. On its basis, water solutions are also being prepared for spraying strawberries from brown spot.

When used properly, vitriol is not dangerous. However, when interacting with it used protective equipment and precautions are taken.

The substance is not addictive in strawberries, has no side or any undesirable effects. The vitriol has a superficial effect and does not penetrate the plant tissue.

Tip! For processing strawberry requires 50 g of vitriol per 10 liters of water.

The vitriol is used in early spring to prevent spotting. The solution is applied by spraying strawberry bushes. To disinfect the seedlings, its roots are dipped in the preparation for 3 minutes, then thoroughly washed with water.

Folk methods

Folk remedies are safer for humans. They are prepared from the available components, so they are not expensive. The effect of such drugs is aimed at disinfecting soil and strawberries. Traditional methods of struggle can be used repeatedly during the growing season of strawberries.

Potassium permanganate solution

Processing with potassium permanganate is a common method of combating diseases of strawberries. This substance is commercially available, it is not dangerous to use and gives good results against brown spot.

Manganese provides in plant organisms metabolism, as well as the process of photosynthesis, carbon and nitrogen metabolism. Additionally, this element increases the sugar content in strawberry fruits.

Tip! The first treatment with potassium permanganate is carried out in the spring in the amount of 10 g of substance per 10 liters of water.

For each bush enough 2 liters of solution. Additionally, we fight spotting by spraying strawberries. For this, take 1 tsp. potassium permanganate on a bucket of water.

Iodine solution

Iodine has good disinfecting properties. On its basis, root dressing and spraying of strawberries from brown spot is carried out. Iodine prevents the spread of fungus on plantings.

Top dressing iodine performs in early spring. This procedure is especially useful for young plants. The solution requires 10 liters of water and 3 drops of iodine. In the autumn of planting watered with a solution obtained from 10 liters of water and 15 drops of iodine.

Important! For spraying strawberries from spotting requires 10 liters of water, 1 liter of milk and 10 drops of iodine.

Iodine treatment is allowed to be carried out every 10 days. Prior to flowering, plants can be further fed with iodine solution.

Works are carried out only in cloudy weather, since iodine can cause leaf burns when exposed to the sun.

Wood ash

The products of combustion of wood and plant residues contain phosphorus, calcium and other useful components. An additional effect from the use of wood ash is protection against diseases and pests.

Ash is brought under each strawberry bush during soil mulching. Re-plants are fertilized with ash in the fall after pruning.

Tip! On the basis of ash preparing a solution for spraying strawberries.

1 cup of ash is added to 1 liter of water. Means infused day. It is then added to a bucket of water and sprayed on the plants.

Onion or garlic infusion

Onion peel contains volatile production, which destroy the fungal environment. Watering infusion onion peel is used for the prevention of brown spot and when it detects its first symptoms.

Tip! For the preparation of funds needed 1 cup of husk, which is poured 1 liter of boiling water.

The tool is infused for 2 days, then it is diluted with water in a ratio of 1: 2. The resulting infusion of strawberries watered at the root or sprayed on the sheet. During the season you can spend a few such treatments.

Instead of onion peel, apply garlic in an amount of 0.1 kg. Heads, husks, leaves, or arrows of garlic are suitable for this infusion. All components are crushed and filled with hot water. The tool must be left for 5 days.

Garlic infusion can be sprayed with strawberries or irrigated at the root. The tool copes with the causative agent of the disease and can be used to prevent it.

Preventive measures

The following measures will help to avoid the development of the disease:

  • timely care for strawberries, the destruction of infected bushes;
  • choice for planting lighted areas;
  • elimination of high humidity due to drip irrigation equipment;
  • introduction of nitrogen fertilizers in the normal range;
  • selection of varieties resistant to diseases;
  • treatment of seedlings and soil before planting;
  • ensuring air exchange in the strawberry by trimming the leaves;
  • soil mulching;
  • supplementary feeding with potassium and phosphorus;
  • limited use of nitrogen fertilizers.


Brown spotting affects the leaf plate of strawberries, which negatively affects the development of this plant. In the absence of the necessary measures, yield losses reach 50%. Copper-based substances are used to combat the disease. Depending on the type of drug, treatment is carried out in early spring or during the growing season.

Positive results are obtained by processing strawberries with folk remedies. They are used to disinfect plants and soil cover. Protect planting from brown spot will help competent care: watering, pruning, fertilizer. Planting and adult plants are processed.