According to the Nagano Prefectural Agricultural Experiment Station, the ripening period is around early September in Suzaka City, Nagano Prefecture. In order to grow marketable fruits, gibberellin treatment is applied to flower (fruit) clusters. .In order to ensure that the fruit is free from drupes, it is necessary to fully understand the appropriate period for the early stage treatment. Because the treatment is performed by predicting 14 to 10 days before flowering, the number of leaves and the condition of the spikes are well controlled. In general, the optimum time for treatment is when 10 to 12 leaves have developed and the buds at the tip of the spike have separated, but the optimum time depends on the type of planting and tree body conditions. It seems that there were many unstable factors because it was a little different. However, since the Flumet solution became available, the suitable processing period has been expanded and the fruit set has been greatly stabilized. In the latter stage of gibberellin processing, it is performed to promote fruit enlargement. The proper time for treatment is 10 days after flowering, but if it is not done at the proper time, the growth of the fruit grains will be inferior and the growth of the fruit powder will be poor. In early cropping types such as ultra-early heating cultivation and early heating cultivation, the growth of new shoots tends to be uneven, so the late treatment is divided into several times. , Since the arrangement of new shoots is relatively good, it is possible to process them all at once. In addition, if the gibberellin solution in the treated bunches does not dry out for a long time, it seems that a fruit surface disorder commonly known as gibberellin is likely to occur. In recent years, sesame seed discoloration has almost disappeared, but in gardens where this is a concern, a small amount of manganese sulfate is mixed during late treatment.) is essential. Peel color is purple-black with a lot of powder, the fruit is obovate, about 13-15 g, the peel is difficult, the flesh is crumbling, the flesh is slightly hard, crisp and has a foxy aroma. You can also eat the skin. The sugar content is 18-21 %, and the acid content is about 0.4-0.5 %. Cultivation in greenhouses is a prerequisite, as fruit cracking may occur due to rainfall before harvest.
The Nagano Purple Grape is a triploid anucleate variety developed in 1990 by crossing “Kyoho Grape” with “Rizamart Grape.” , Seedless grapes do not enlarge the fruit, so they are treated with gibberellin to enlarge.Tetraploid: means that the number of chromosomes in the cell is an integral multiple of the normal individual.The number of chromosomes in grapes is 19, so the diploid is 38, and the tetraploid is 76. In terms of cultivars, the Delaware grape and Shine Muscat grape are diploid, Kyoho grape and Fujiminori grape are tetraploid, Kingdera grape and Summer Black grape. In general, tetraploids tend to have larger grains than diploids, and triploids tend to produce seedless fruits.). The breed was registered in 2004. At the time of registering the cultivar, it was said to have been bred by crossing “Kyoho Grape” and “Rosario Bianco Grape”, but it was revealed that the pollen parent was “Rizamart Grape” and was announced on December 22, 2010.
A certain farmer’s orchard near the harvest, thoroughly manages the new shoots and keeps them bright. Flower shape scale blue line is 3.5 cm. The black line is the length of the axis before picking. The flower spikes are treated with Nagano Purple just before harvest.The caps must be removed. After flowering, the new shoots should be trimmed at least twice after covering, and the secondary shoots should always be trimmed with two pieces so as not to darken the garden. The tip of the accessory canopy should not be lengthened, and should also be pinched with two pieces. Scrape off the grandchildren, but if possible, I would like to have an appropriate tree vigor so that they do not grow. To check the coloring progress, remove the bag before the Obon period (around July 20) during the veraison period (around July 20) and check the progress. See if it can be harvested and start harvesting. As a guideline for harvesting (coloring confirmation method, etc.), remove the bag of 2-3 bunches near the main stem and check if the roots of the grains are colored. In addition, the sugar content at the tip of the bunch is measured and harvested after confirming that it is 18 degrees or higher. As for the pest control system, pest control is carried out according to a unique pest control calendar to be shipped as a specially cultivated agricultural product. Since the control frequency is small, some diseases are endured. Preventive spraying should be avoided as much as possible. I know the fields that are prone to disease, so I always keep an eye on them and think about controlling them if they appear. Late rot (occurs mainly in mature fruits, but may also occur in flower spikes and young fruits. When young fruits are affected, light brown to black small spots are produced, cork in a scab-like manner, softening and rotting. At first mature fruit develops small reddish-reddish circles that develop rapidly and spread over the entire fruit surface.The rotted area develops small speckles and produces sticky salmon-colored masses of spores. The fruit gradually develops wrinkles and mummifies as it loses moisture.Depending on the variety, the fruit may drop, but in Kyoho grapes, it seems that it often remains on the tree until the end of autumn.Also, apple anthracnose. As a result, it seems that it overwinters without forming lesions in the tissues of mother branches and tendrils.For this reason, it is not possible to determine the presence or absence of carriage with the naked eye.The pathogen that has overwintered from late June to July It actively produces spores until the beginning of the month and is transmitted with raindrops.It occurs frequently when there is a lot of rain during this period.) is so damaging that we have to rely on preventive spraying, but by covering the bag, the rain will splash on the bag. It seems that the damage is reduced by making it harder. In particular, I am careful to completely remove the cracked kernels when packing. The occurrence of rust is affected by rain immediately after fruiting and pest control. It seems that he is paying attention to the timing of chemical spraying at this time. Pest control, soil management, fertilization is an all-organic fertilization system. Mole compost, phosphoric acid (bat guano 28%), lime (coral fossil), soil improvement Apply good medicine (Yakushi) from late November to early December. Nagano purple grapes are getting stronger, so no additional fertilizer is applied. Also, brackish water, soil moisture management. Irrigation starts after the end of the rainy season, and is irrigated twice a week with stationary sprinklers. It takes about 1 hour and 30 minutes with one spot of brine. It takes a lot of time and effort because it has to be moved each time. amount is unknown. Since it is river water, it seems that there are problems such as hoses being washed away due to rising water, and garbage being clogged. At the end of May, the entire surface is covered with cut straw. Bedding is useful for controlling weeds, preventing fluctuations in soil moisture, protecting soil micro-organisms, and replenishing organic matter. Implemented for the purpose of food supply, prevention of gray mold, etc.