Glass currant: effective control measures, how to process and how to get rid of

If in the spring you began to notice that on he althy currant bushes branches suddenly wither and dry, and a black core is visible on sections of dead shoots, then you are dealing with a glass case. The pest should be taken with all responsibility, as it is able to destroy the crop of berry crops. How to get rid of glass on currants, you will learn further.

Appearance and life stages of the pest

Outwardly, the glass case looks like a small wasp with narrow wings that stand out with orange stripes along the edges.The body of the pest is oblong, reaching one centimeter in length. Females have three light stripes, males have four. Insects feed on crop sap or pollen.

At the end of May or the beginning of June, the vitreous lays about 50 eggs, the length of which reaches 70 millimeters; they are easily recognizable by their oblong shape. To lay eggs, the insect climbs into the bark of the shoot, always in the immediate vicinity of the young kidney.

The larvae of the pest cause the greatest harm, namely, caterpillars of white or beige color, which reach a length of up to 2.5 centimeters, because 10 days after leaving the eggs they destroy the shoots from the inside. Parasites, penetrating into the thickness of the stem, feed on it and develop. Thus, sooner or later, they reach the core of the plant.

With the onset of spring, the caterpillar emerges into the light, pupates and gives birth to a new generation. A new butterfly appears already in June, when the average air temperature exceeds +15 degrees.

The insect remains active for 40-42 days, and the life cycle is two years.

Signs of fruit bush infection

The branches affected by the glass case are almost impossible to distinguish from a he althy plant in the first year, but it can be noted that the leaves and berries begin to shrink. It is for this reason that the pest is difficult to detect in the early stages of its appearance.

Damaged branches begin to actively wither and dry out at the end of flowering or at the moment when berries begin to form (during active feeding of older caterpillars). It is easy to notice these damages only when the leaves begin to bloom the next spring (especially in contrast with he althy plants).

If you start harvesting dry branches, dark holes with black walls are marked on the cuts. By cutting the branch lengthwise, you can see the passage, which is filled with caterpillar excrement, or even the caterpillar itself.

What is dangerous glass on currants

Glass glass, parasitizing in the Middle lane, can damage up to 50% of the branches of black currant plants and up to 30% (sometimes up to 47%) of white and red. The degree of damage depends on the climatic conditions in the region.

How to get rid of a butterfly?

The difficulty of pest control is due to the fact that the glass-box parasitizes the culture in such a way that its life cycle takes place out of sight, that is, inside the currant branches. Therefore, as a rule, the fight against glass on currants includes a complex of various activities, in particular:

1. Use of biological preparations, pesticides.
2. Folk methods.
3. Using organic farming practices.
4. Preventive measures.

Next, we propose to dwell in more detail on each type of event.

Biological protection

To protect currants from such a pest as a glass case, biological preparations, which are aqueous suspensions of nematodes, are recommended for use. These include tools such as Nemabakt and Antonem-F, which are used to process currant cuttings immediately before planting in the ground. To do this, the cuttings must be placed in wet sand with the preparation for three days, and the ambient temperature should be at the level of +25 degrees, and the humidity of the sand should be 20%.

Antonem-F is also used to irrigate currant bushes at the moment when the buds begin to bloom. The average fluid consumption is 200 milliliters per plant bush.

Speci alty drugs

The use of exclusively biological preparations against pests, unfortunately, is not a sufficient measure, so the use of pesticides remains almost inevitable.Among such drugs, such drugs as Kinmiks, Karbofos, Iskra, Kemifos, Fufanon and Trichlormetafos have proven themselves from the best side.

Folk, proven ways to fight

To get rid of the glass, they also resort to folk methods. For example, crops such as onions, calendula, garlic, marigolds and others are planted between the rows of currants as a deterrent from a pest. It is also appropriate to plant elderberry or nasturtium. However, there are also crops that, on the contrary, are able to attract glass, for example, bird cherry.

At the time when the butterflies begin to actively move, a container with sand is placed between the bushes of plants, which is impregnated with kerosene. Also a good method is to process currants with any infusion that has a sharp aroma. It can be needles, wormwood, onion peel, tansy and others.

Such smells have the ability to disorient pests to some extent.

Terms and processing rules

It is necessary to spray the bushes with the appearance of the first leaves. This is considered a good time, since during this period caterpillars begin to appear, which reside on the surface of the stems. It is during this period that it becomes possible to destroy the glass case as efficiently as possible.

Currant bushes are subject to careful spraying with certain preparations. So, for each plant spend 1-1.5 liters of solution.

Frequency of procedures

In the spring, before the buds begin to bloom, black, dry and frozen branches are pruned, which is done under the root so that there is no hemp. Those shoots that are under the bush on the ground are also removed. It is important not to harm the he althy parts of the bush.

Closer to winter, sanitary pruning of currants is carried out. The bush is thinned out, thus losing underdeveloped or dried sprouts. All sections are necessarily treated with garden pitch or special paste.

As for the preventive treatment with insecticides, it is carried out after the onset of heat. Most experienced gardeners prefer Antonem-F. Processing occurs before the appearance of leaves and until the moment when the ovary begins to form. If necessary, the procedure is repeated after two weeks. As soon as the snow melts, the earth is loosened, sprinkled with dry mustard, ashes or wormwood.

Before the winter period, the chemical treatment is repeated. Also, for immunity, they carry out spring and autumn feeding, using mineral or organic substances.

Resistant varieties

Breeders to date, unfortunately, have not bred varieties that would have absolute resistance to such a pest as a glass case. However, there are species that have a certain level of endurance.

Blackcurrant

Blackcurrant varieties that are able to resist the pest:

1. Strong.
2. Dachnitsa.
3. Sechenskaya-2.
4. Perun.

Redcurrant

Red currant varieties that tend to resist the pest:

1. Early sweet.
2. Natalie.
3. Jonker Tets.

Prevention measures

When purchasing currant seedlings, it is necessary to carefully examine them for obvious diseases or damage. In particular, special attention is paid to the core of shoot cuts.

The next preventive measure is planting elderberry next to the currant, which will scare away the glass from the plant. By the way, elderberry can also scare away a lot of other pests.

As part of prevention, it does not hurt to plant vegetables (garlic or onions), as well as certain flowers (calendula, marigolds). All these plants are planted directly between currant bushes. The smell of crops will not allow the pest to find fruit and berry bushes, respectively, it will not be able to breed offspring in them that pose a threat to the future harvest.

Recommended