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Currant gall midges are small flying mosquito-like insects that can infect all parts of the plant. In the places where their larvae feed, peculiar swellings are formed, called galls in gardening. They mainly affect blackcurrant bushes. There are three types of gall midge on currants:

1 Leaf;
2 Floral;
3 Stem.

Mature mosquitoes have a yellow-brown color, and their body length reaches up to 5 mm. Komakh caterpillars first have White color, and as they develop they acquire a red-orange hue, becoming scarlet at the end. All varieties overwinter on surface layer soil in the larval stage. With the onset of warmth, they pupate, and at the first flowering of the bush, adult individuals begin to activate.
Leaf gall midge on currants

Taking a closer look at currant leaves in summer, you can sometimes see next picture: Just yesterday, the juicy green leaves of the bushes began to swell at the bottom, and red and brown spots appear. This is the currant gall midge. This is the name given to the gall aphid, a well-known garden pest that can destroy beautiful foliage in a short period of time. In summer, winged individuals appear in aphid colonies, which migrate to herbaceous plants from the Lamiaceae family, where they feed and reproduce until the end of summer. Wingless individuals feed on currants until September. The spread of currant gall midge is promoted by warm winter and dry summers.
Flower gall midge on currants

201. Safe and reliable remedy for aphids

Protection of currants and gooseberries from aphids and currant moth

And if gall midge appears on currants during the growing season, then the treatment should be carried out with one of the following infusions:

Potato tops;
infusion of marigolds;
calendula;
Luke;
soap suds.

Interesting fact! When processing blackcurrant bushes, you need to remember that in addition to chemical and traditional methods fight and gardeners have their own assistant for combating gall midges - beetles and larvae ladybugs, lacewings, larvae of hoverflies that feed on them and destroy them in large quantities. A bunch of beneficial insects can be found in the garden in the second half of summer. Therefore, the fight against gall midges must begin in spring and continue until mid-summer. And in order to attract their helpers, gardeners recommend sowing nectar-bearing plants in the garden.

We are fighting shoot gall midge on currants http://vreditel-stoi.ru/sad/smorodina/smorodinnaya-gallitsa.html

Currant gall midge is found everywhere in central Russia. Affects blackcurrant stems. Clumps of larvae can be found under the bark of branches. There is a food source there - soft succulent tissues of green stems 1-3 years old. Injured parts of the plant darken and are susceptible to cracking. The leaves are drying up. Yellowness appears on them. The stems break.

Sexually mature adult females are brown with a noticeable orange tint. Only the back and head are different: they are completely brown. An unfertilized female reaches 2-3.5 mm in length. Males are smaller – 1.5 - 2.5 mm. Graceful long thin legs are noticeable. The eggs laid are oval shaped and translucent. Hatched caterpillars reach 4 mm in length. Characterized by a colorless appearance. The larvae remain to overwinter, weaving cocoons from cobwebs in the top layer of soil. They are buried 4 cm, directly next to the currant bushes themselves.

The mass appearance of flying individuals is observed during the opening of black currant flowers. Lasts from 2.5 to 4.5 weeks. If leaf gall midges begin it at the beginning of the flowering of the crop, then during the mass flowering of black currants shoot adult mosquitoes appear. Females are immediately ready to lay eggs. In the lower part of the bush, where they fly, looking for cracks in the shoots, they lay eggs. In a short period of existence (2-3 days), the gall midge manages to lay from 22 to 140 pieces on currants. Doesn't like open sunny places. Strives to hide in the shade, closer to moisture.

Having completed the entire development period, the larvae hide in the upper layer of soil to form cocoons. One part of them is in a state of diapause. The appearance of adults should only be expected in the spring of next year.

Summer insects begin to fly and lay eggs in late summer (July-August). They fly for 50-60 days. From August to October, with favorable rainy weather, the larvae begin to form cocoons in the soil. Thus, the leaf gall midge on currants (Perrisia tetenesi Rubs) reproduces two generations per year.

The damage caused by voracious gall midges can be judged by statistics. The yield on damaged one-year-old shoots is reduced by almost half, while two-year-old shoots lose it by up to 64%. At the same time, the population density of a harmful insect at which one or another type of insecticidal preparation should be used, from the point of view of economic benefit, is 20-25% of shoots infected with gall midge.

Methods for destroying gall midges

Black and red CURRANT: CARE, pest control WITHOUT CHEMICALS / APHIDS, ants

Agricultural technology

It is possible to reduce the number of adult insects flying out of the upper layers of the soil by placing pieces of roofing material, film, and cardboard under each bush. This bedding is sprinkled with earth and kept there all the time until the active period stops.

The root zone - the place where the pupae overwinter - is treated with the following composition: tobacco dust, lime-fluff (1:1). It is practiced to use wood ash mixed with sand (1 tsp of ash and 10 tsp of sand). Ash can be replaced with naphthalene. Apply 1 cup of the mixture under each bush.

During the summer, hang mosquito traps with creolin around the garden.

Plant only healthy cuttings for new plantings. To do this, take material from trusted dealers or nurseries.

Before planting, seedlings are disinfected by heat treatment. Water heated to +45°C is used. The planting material is kept in it for a quarter of an hour.

Plant a new berry patch no closer than 1 km from the affected currants.

In early spring and late autumn, dig up the soil and loosen it to prevent the caterpillars from pupating.

You can fight the shoot gall midge on currants by mulching the soil layer in the area of ​​the roots and crown, using peat chips (6 cm layer). This technique prevents adult adults from flying out of the soil.

Remove infected shoots by cutting them out along with the pest larvae. At the same time, make sure that the bark on the branches is not damaged.

Constantly loosening the soil and removing weeds under and between bushes.

Bush pruning. It is necessary to remove unnecessary shoots, preventing the appearance of additional root shoots on which the pest develops.

The fight against gall midges on currants begins when damage is detected on more than 10% of currant bushes during the period of bud formation. Kinmiks (2.5 ml/10 l of water) is used. Kemifos (0.24-0.48 l/ha), Fufanon (1-2.6 l/ha), Actellik (1.5 l/ha), Bitoxibacillin (80-100 g/10 l of water), Karate. After the first spraying, monitor the activity of the pest and its numbers. If necessary, repeat irrigation with one of the compounds, but only when the ovary forms on the bushes. Last time process after harvesting the entire crop. At the same time, instead of the listed chemicals, you can use a 0.7% suspension of 30% wettable DDT powder for spraying

Not only the bushes are irrigated, but also the soil under them. You need to use Karbofos emulsion (50% e.g.) with the addition of 0.2% Trichlorometaphos. If, when loosening, cocoons are discovered again, then the soil needs to be processed again, 1.5 weeks after the initial treatment.

Attention! Fufanon, an insecticide with contact-intestinal fumigant action, has proven itself well in the destruction of all types of gall midges. It is effective against the whole group plant pests, but not in combination with other insecticides. To prepare the emulsion, 5 ml of the drug is diluted in 2 liters of water. Stir well and then add water to the required concentration (5 l). Currants are sprayed immediately after cooking in dry weather. For 1 bush you will need 1.5 liters.

Infusions and decoctions

Before flowering, immediately after it, and also after harvesting, infusions of ash, garlic, yarrow, and walnut shells are applied to currant bushes.

An infusion of field chamomile and poisonous henbane (black) is practiced.

Before the buds bloom, sprinkle the bushes with a solution: 300 g of copper sulfate with 400 hydrated lime.

In the fight against a pest on currants, it is important to detect it in time. Identification work should begin with early spring and continue until late autumn. This will determine the nature of the activities and will allow you to select the necessary chemicals. With each subsequent treatment, it is better to alternate insecticides.

Gall midge is an insect pest. Find out what the gall midge looks like, why it is dangerous, how it reproduces, and more. Detailed description leaf currant gall midges as an insect pest. Preparations have been selected to destroy gall midges.

What does currant leaf gall midge look like?

The currant gall midge is a tiny brownish-yellow dipterous insect less than 2 mm long. Harmful to black currants; most dangerous in nurseries. It has become widespread in the European part of the Russian Federation.

How is the currant gall midge harmful?

The larvae wait out the winter in white cocoons in the top layer of soil under currant bushes. Pupation occurs in the spring. The emergence of adult gall midges usually coincides with the phase of exposure of buds and the beginning of currant flowering. Eggs are laid in the folds of the budding upper leaves. Fertility averages 50 eggs. After 3 - 4 days, legless translucent larvae appear. Their feeding causes distortion and drying of young leaves. At serious damage the growth of the shoot stops, its top begins to dry. Larvae that have finished developing begin to pupate in the soil. From 3 to 4 generations develop per year.

Methods of combating gall midges. How to destroy gall midge?

It is necessary to plant industrial plantings with exclusively healthy planting material. Be sure to carry out autumn or early spring digging, loosening and mulching of the soil, and remove damaged shoots. If more than 10% of the bushes are populated during the budding period, then you need to use bitoxibacillin, kemifos, fufanon, actellik. Spraying can be repeated, if necessary, during the formation of ovaries, as well as after harvesting. Nurseries also use BI-58 New, karate.