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.
One, branch management
1, wipe off. The young shoots of cutting grape seedlings grow to 40-50 cm in mid-July. Some seedlings have several new shoots or several shoots of new shoots. They must be removed in time to obtain a robust new shoot.
2, topping. 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 tip of the tip of the tip grows to 6 leaves, leave 3 leaves topping. All the tips on the tip were erased.
3, tied. 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.
Second, water, fertilizer, soil management
When the seedlings grow to 8 leaves, 15-20 kg of urea is applied per acre. After 15 days, the urea 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 the new shoot grows to 7-8 leaves, the hybrid seedlings can be recognized 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. In the "small snow" before and after the exit is more appropriate. There are many plastic mulches in the nursery gardens. Generally, no cultivators are needed to remove the weeds. Remove earthworms and weeds on both sides 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 topping the seedlings, spray a 1:0.7:200 Bordeaux mixture. If downy mildew is found, spray 600 times Kepo 600 times, or 80% ED 300-500 times. The Bordeaux mixture is mainly 1:1:180 or 1:1.5:180 in autumn.
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