Every year, there are fruit growers who do not grow strong grape seedlings or virus-free grape seedlings. The reasons for this, or lack of experience, or ease of management. The quality of grape seedlings depends on the management of summer and autumn.
Vine management:
1. Obliterate. The young shoots of cutting grape seedlings grow to 40-50 centimeters in mid-July. Some seedlings have several shoots or several new shoots. They must be removed in time to obtain a robust new shoot.
2. Take heart. When the grape seedling shoots grow to about 50 cm, it starts picking. After the picking, the sub shoots are all erased except for the top one. When the apical tip of the tip grows to 6 leaves, leaves 3 leaves to pick the heart, and the tip of the secondary tip is erased.
3. Framed. The new shoots on high-grade grape seedlings can be placed at 1.0-1.5 meters. Such seedlings must be tied. You can insert a bamboo raft every 3-4 meters between two rows of seedlings, and apply 2-3 thin iron or nylon ropes. Two bamboo poles pull one line each. Attach the two rows of seedlings to the wire or nylon rope between the bamboo baskets. If the seedlings are relatively thin, one bamboo shoot may be tied to each new seedling shoot.
Management of water, fertilizer, and soil: When the seedlings grow to 8 leaves, 15-20 kg of urea is applied per acre. After 15 days, it is applied once. Generally, it can be applied 3 times. The root dressing was divided into two sub-floods. In the summer, 0.5% urea was sprayed with spray and 0.3% potassium dihydrogen phosphate was sprayed in the autumn.
Before the grape cuttings sprout, water is usually poured every 7 days. After the new shoot grows to 10-20 cm, water is poured every half month. After the new shoots grow to 30-40 cm, they will be poured every 20 days. If seedlings don't come out of the garden before winter, they must be poured with winter water. Every time you topdress, you should water it. When shoots grow to 7-8 leaves, they can be removed and rooted. Different grape varieties should be marked with bamboo and inserted in different varieties.
After the grape seedlings fall out of the plant, they should not leave the nursery immediately, because this is the process in which the nutrition continues to be stored in the roots. Before and after the small snow out of the garden is more appropriate. The seedlings in the nursery are often covered with mulch. Usually, the cultivator is not used for cultivating and the weeds can be pulled out. The weeds and weeds on both sides are removed after each watering.
The diseases of grape seedlings are mainly downy mildew and black pox, and the pests are mainly cotton bollworm, beet armyworm and grape moth. Spraying can be used to comprehensively control pests and diseases. When the seedlings grow to 8 leaves, spraying is started, 50% carbendazim 500 times can be sprayed once, and 80% spray gram 600-800 times can be sprayed after half a month. After the seedlings were picked up, a Bordeaux mixture of 1:0.7:200 was sprayed once. If downy mildew is found, spray 600 times Kepo 600 times, or 80% ED 300-500 times. The main Bordeaux mixture is 1:1:180 or 1:1.5:180 in autumn.
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