Introduction and planting technology of sweet sapphire grape!

Author: grape planting Union

Sapphire grape (Sweet Sapphire Grapes), alias: moonlight tears (moon drops), belongs to Eurasian species. The variety is patented by an embryo rescue technology agency that breeds seedless varieties and is jointly developed and promoted by International Fruit Genetics and the University of Arkansas.

Sapphire is a medium-ripe variety, mature in the open field from August to September, does not drop grains, does not rot after maturity, hang trees for more than one month, and is resistant to storage and transportation. Easy to form a large ear of more than 1000 grams, naturally seedless, and the fruit can reach about 10 grams without hormone expansion. The fruit is long cylindrical, shaped like a little finger, about 5cm long. The fruit color is blue and black, and the coloring is fast and uniform. Knife cut into slices, pure flavor, crisp sweet without residue, soluble solids more than 20%, dry areas with higher sugar content, easy to turn into large blue-black raisins. The fruit is not crowded, there is no broken grain, thinning fruit saves labor. The fruit brush is tough and not easy to drop when ripe. And the use of small dragon dry technology, the output is doubled. It is expected to become the main variety, which has been introduced in our country.

Main characteristics

Sapphire grapes grow vigorously, full flower buds move forward, super-long shoots should be pruned and dried dragon techniques should be adopted, the panicles are large and easy to color and mature, so it is easy to obtain high yield. In northern Shandong, it sprouted in early April, early blossomed in late May, bloomed at the end of May, the young fruit expanded for the first time in mid-June, the fruit began to color in mid-August, matured in late August, and the fruit hung for a long time after maturity. This variety is easy to cultivate, the fruit is not crowded, no broken grain, not rotten tip, thinning fruit and saving labor. The fruit brush is tough and not easy to drop when ripe. The fruit is resistant to anthracnose, black pox, white rot and powdery mildew, but the leaves are not resistant to downy mildew, so it is suitable to be planted in the greenhouse or protected from rain.

Sweet sapphire knife cut into slices, pure flavor, crisp sweet without residue, soluble solids more than 20%, dry less rain, higher sugar content, even as high as 27%, easy to turn into large blue-black raisins, far more than the famous sun-dried variety blackcurrant.

Flower and fruit management technology

1. Promoting flower buds: the reason for small ears and small ears is that the flower buds are not full, and the conditions for forming full flower buds are:

① big fat and big water, make sure the prepared branches are more than 2 meters before July 20.

The branches on the ② reserve branches grow to a twist and sag.

When the prepared branch of ③ reaches 1.5m, spray No. 3 to the bottom of the leaf to regulate and control the leaf fertilizer.

④ can control diseases and insect pests and protect leaves.

two。 Flower and fruit protection: balanced fertilization to prevent jointing and growing. Combined application of medium and micro-fertilizer, spray luxuriant and strong leaf fertilizer after germination to prevent element deficiency. Spray No. 3 regulates leaf fertilizer to form full flower buds. The vigorous fruiting branches pinched about 8 leaves, and the fruiting branches dug buds to promote the transfer of nutrients to the ear. Do not indiscriminately administer drugs during flowering and young fruit stage. The air in the shed should flow and the flowering period should be pollinated at 11-13:00 every day. The flowering period should not exceed 28 degrees during the day, and the night temperature should not be too high to avoid elongation. Winter greenhouse flowering period should not be watered to prevent the ground temperature from getting lower. The arch shed is watered in the morning during the period of high temperature and drought. Timely control of diseases and insect pests, protection of leaves. After 20 days of fruit setting, the fruit was thinned, sprayed with fungicides and covered with grape bags.

3. Flower thinning and fruit thinning: each main vine leaves 5 fruiting branches, and the extra ones are erased in time. Only one ear of fruit is left for each fruiting branch, and the excess is erased when the inflorescence is just spit out. About 1000 grams per ear, for example, a variety with a grain weight of 10 grams leaves about 100 grains. Pinch off the ear tip at full flowering, and remove the small fruit and over-dense fruit after 20 days of fruit sitting.

Article Source: I will plant, author: fruit Seedling cultivation Center

Editor: forest trees