Where does the web on currant come from: diseases and pests

Currant bushes grow in almost every household plot. They are not whimsical to care for, and the berries are distinguished by a peculiar taste, aroma and rich vitamin composition. However, often beneficial plantations are exposed to diseases and pest attacks, as indicated by the currant web. Timely identification of the cause and the implementation of measures to destroy the culprit will help prevent the death of the plant.

Culprits of the appearance of the web on the currant

Currant bushes can be chosen by different insects: butterflies, ticks, moths and many others. Damage dealt, as well as control methods for each pest, are different.

Sphere library

Sphereotica (powdery mildew) is a disease caused by fungal spores. Appears in June on young foliage. It looks like a whitish coating, which at the initial stage can be easily removed. Subsequently, it develops into a web that resembles a felt coating of a brown or light shade. Gradually affects both old and young leaves, berries.

With severe infection, deformation of the shoots begins, twisting and reduction of the size of the leaves, the plant weakens. If the disease is not stopped, the currant bush may die.

How to deal with a spiderweb currant web:

1. In the spring after flowering, the bushes should be sprayed with a solution of iron sulfate in a proportion of 1 g per 10 liters of water. Repeat the procedure 2-3 times with an interval of 10-12 days.
2. To combat spores of the fungus on the currant, humus infusion is used. Mix 1 part humus and 2 parts water, let it brew for 2-3 days, strain and process the bushes with the finished mixture.
   
3. Trim the tops of the shoots and twisted leaves regularly.
4. Sprinkle soil with wood ash.
5. To treat plants affected by powdery ash, you can prepare an infusion of wood ash, mix it with liquid green soap and spray the infected bush from the spray bottle. For the same purpose, a weak solution of potassium permanganate is prepared with a few drops of iodine and low-fat milk or whey.
6. To prevent the disease, annually in late autumn silt in the early spring to process currant bushes with Nitrafen.

According to gardeners, the planting of filamentous veronica prevents the development of powdery mildew.

Gooseberry moth

The insect hibernates in the pupal stage in the cradles of Putin. In the spring, with the onset of heat, a mass departure of adult butterflies begins. They are distinguished by a nondescript color. The length of the body does not exceed 14 mm, the wingspan reaches 30 cm. Female individuals begin to actively lay tiny oval eggs in buds, flowers, and ovaries.

The female is able to lay up to 200 eggs. Under favorable conditions, after 7 days, caterpillars of a yellowish color 3 mm in length appear from them. The younger generation is very gluttonous and begins to absorb the barely formed berries.

Each gooseberry moth caterpillar can destroy up to 15 currants.

The development of the larva lasts 30 days. During this time, it increases in size and acquires a rich green color with dark spots on the sides.For pupation, the caterpillar descends on the web to the ground. On damaged bushes, you can see berries with holes and cobwebs that stretch to neighboring fruits.

How to deal with a firebox:

• regularly carry out deep digging of the soil around currant plantings;
• timely remove cobwebs on the currant;
• to fill the soil with a mulch layer of 7-8 cm;
• during flowering, treat the bushes with infusion of wormwood, tobacco;
• to destroy the caterpillars, spray the currants with a solution of green soap;
• place traps made of bright orange cardboard with long-drying adhesive applied;
• with severe infection, insecticidal drugs are used: "Karate", "Kinmix", "Spark".

Currant kidney moth

With the advent of spring, yellow caterpillars crawl out of the soil. The object of nutrition is the kidneys, which the pests eat out completely, leaving cobwebs and small excrement behind, which leads to the drying of the damaged kidneys.

One individual destroys from 4 to 7 kidneys. With a large accumulation of insects are able to bare the currant bush, thereby leaving it without a crop.

Before the flowering of the currant, the larvae become olive in color, their size reaches 8 mm, and they pass into the pupation phase. This period the pupae spend in the soil under the currant bushes.

At the beginning of summer, small butterflies of the kidney moth fly out of the pupae, the wingspan barely reaches 16 mm. The wings are yellow-brown with white stripes. Adult individuals begin to multiply actively. Females lay eggs in the flesh of unripe berries, which serve as a source of nutrition for hatching young caterpillars. Having destroyed the fruits, the young growth moves to wintering places.

Methods to combat kidney moth:

• To reduce the population of harmful moths, it is necessary to timely remove weak shoots, plant debris under the bushes.
• In the autumn, carry out deep digging of the soil.
• In early spring, currant bushes are sprayed with a DDT solution prepared in accordance with the instructions from an emulsion, suspension, powder. Also, plants can be treated with a solution of chlorophos. Timely spraying will destroy all the caterpillars of the kidney moth.

Leaflets

Blackcurrant web may appear due to fault leaflets. They do not bypass their attention and bushes of red currant, fruit trees. In April and May, caterpillars live in inflorescences, gnaw buds, buds, entangle them with a web. When the plants have grown green mass, the diet of the caterpillars is supplemented by leaves, and with a large accumulation of fruits. In the spring, one caterpillar can damage up to 30 buds.

Small butterflies appear in late May. Years are observed until late autumn. Females lay eggs on currant leaves at dusk, the process lasts about 4 weeks. During this time, the female manages to lay 100-150 eggs.

Under favorable conditions, a mass reproduction of currant leafworms occurs, which destroy up to 80% of the leaves in the infected area, which leads to a decrease in yield, weakening of the bush, and a decrease in frost resistance.

How to deal with leaflets:

• in early spring, when the air temperature is above 10 ° C, the bushes are treated with insecticidal solutions, it is extremely important to do this before flowering;
• for spraying the bushes, a decoction of wormwood is prepared: pour 800 g of dry grass with 10 liters of water and leave for 2 days, after which boil the infusion for 40 minutes, strain and add water to make 20 liters of solution;
• broth from tomato tops is not less popular - chop 2 kg of leaves and roots, add 5 liters of water, let it brew for 4 hours, then boil for 40 minutes, store the infusion in a dark place, dilute the currants in half with water to spray the bushes and add 20 g of liquid soap.

Spider mite

A spider mite is characterized by a colonial structure. In each colony, there are up to several hundred individuals. The color of adult insects is variable: from yellow-green to brown.Overwinter in the upper layers of the soil or under plant debris. Until the currant bushes have acquired leaves, the first generation can parasitize on weeds. After moving to a cultivated plant, ticks braid the branches with cobwebs and equip their nests.

Insects pierce the leaves with a sharp proboscis, drink juice from it. Characteristic points remain on the affected areas, a peculiar marble pattern forms on the sheet. Damaged by a spider mite, the leaves begin to curl and subsequently fall off. In addition, pests transmit viral and fungal infections.

The life cycle of ticks is 15-20 days. For such a short time, the female lays 200-300 eggs, of which within 3-4 days hungry larvae appear. After 7 days, they become full-fledged sexually mature individuals and begin to actively reproduce themselves.

Bushes of white and red currants suffer more from the spider mite.

How to get rid of a spider mite:

• The parasite is afraid of water and high humidity, so currant bushes can be poured with a powerful jet from a hose, this will wash off a significant part of the population, and then cover the bush with polyethylene for a short time. Before the procedure, you must remove the entire web.
• Around the bush are containers with ammonia or turpentine. The plant is covered with a film and insects die from a suffocating smell.
• Currants are processed with a decoction of tops of tomatoes, potatoes, extracts of dandelion, wormwood, celandine.
• A good effect in the destruction of the spider mite gives garlic tincture.

Spraying bushes with plant solutions is carried out in the early morning or evening hours every three days. If alternative methods have not brought the proper result, you should use biological products: “Tick-borne”, “Vertimek”, “Agravertin”.