The popularity of amateur viticulture is growing every year. Sometimes the advantages and disadvantages of a variety or hybrid form have to be identified empirically, when the plant is acquired and planted on the site. Let's try to figure out what the black finger grape variety is good for, in its main advantages and disadvantages.
- Black finger grapes or black finger, variety description
- How to plant black finger grapes
- Some features of growing Black finger or black finger grapes
Black finger grapes or black finger, variety description
Given the fact that winegrowers have always valued seedless forms of grapes, the appearance of each new variety is of interest to lovers of this culture. This fully affected the hybrid form of grapes called Black finger or black finger. This hybrid form has a reputation for being the largest seedless variety.
The size of the berries is 2.6 cm, their weight is impressive, it reaches 12-14 grams. For comparison, the largest seedless white raisin grape, which, like the black finger, was tested by Chilean winegrowers, has a berry weight of about 4 g. The authorship of the variety is assigned to the Israeli research institution Volcani Center. Today it is one of the leading organizations in the development and testing of new varieties of agricultural crops.
The seedless black finger is one of the latest seedless varieties. Ripening period is about 145 days. To get an economically viable crop, which begins to be harvested in early October, it is recommended to grow it in southern regions with a sufficient number of warm and sunny days. Bushes are vigorous, clusters are large.
The color of the berries is black, the shape is round-oval, the skin is of medium density, the pulp is elastic, aromatic. Good taste, harmonious taste, sugar content up to 20%, acidity up to 7 g / l. The main advantage of the variety is the size of the berries and the absence of seeds in them. It is these varieties that are in demand today in the European and American grape markets and the price for them is kept at a fairly high level.
The disadvantages include poor resistance to some fungal infections. In addition, large seedless berries can be obtained if, when the berries reach a size of 0.5 cm, the bunches are treated with a giberellin solution. More details about this technique will be discussed below.
How to plant black finger grapes
An important point in planting black finger grapes is the acquisition of planting material. Due to the fact that the variety is patented by the Israeli center, the seedlings are sold under its license. Therefore, you can trust those sellers of seedlings who have such a document. Otherwise, under the guise of a black finger, you can buy a similar variety of the breeder A.P. Tereshchenko called Alyonushka. These varieties are united by the dark color and large size of the berries.
The difference between them is that the black finger does not have seeds, and in Alyonushka there are seeds, although in small quantities. The vineyard must be south-facing and well sheltered from the wind.
To do this, you may have to build a solid fence up to 2.0 m high. If there is a close occurrence of groundwater on the site, then high ridges will need to be made before planting. The best time for planting is spring. If there are 1 - 2 seedlings, then planting pits are prepared. With a large number of bushes, you need to dig a planting trench. When planting grapes, be sure to:
- to separate part of the topsoil
- add 5 - 6 kg of rotted manure, humus to it
- put 1 - 2 tbsp. spoons of complex mineral fertilizer
- mix and return everything to the pit
- set a seedling
- cover the roots with the remaining soil
The root collar should remain on top of the ground when planting. It is good to shed the seedling and mulch the trunk circle. Vineyards require increased watering only in the first two seasons after planting. Considering that the black finger belongs to vigorous varieties, then when growing it, you need to adhere to several rules.
Some features of growing Black finger or black finger grapes
Back in the 60s - 70s of the last century, winegrowers noticed the physiological activity of a solution of the giberellin preparation when processing grapes at the stage of berry formation. The main tests began back in 1962. Impressive results were obtained when processing seedless varieties with a predominance of female flowers.
This caused the size of the berries to double, which also led to an increase in the yield. The same technique was used by Israeli breeders. During the growth of the berries of the variety, the black finger of its bunch needs to be processed with giberellin. To obtain the result, you need to dilute 20 mg of the drug in a liter of water and spray the brushes when the size of the berries does not exceed half a centimeter. When ripe, treated black finger brushes will have berries 2 to 2.5 times larger than untreated ones.
In addition, when growing the black finger variety, it is advisable to avoid shelter for the winter with the ground, this can provoke fungal and viral lesions of the vine. Also, for the bushes of this variety, rationing of the yield and removal of excess ovary is relevant, as well as timely pruning of shoots into 8 eyes.
It is best to grow on trellises with canopies on them. The main use of black finger berries is fresh consumption, it is possible to use it in home canning for making compotes and jams.
Video about the Black Finger grape variety