The management of grape seedlings in summer and autumn has a good harvest every year.

Every year, some fruit farmers can not cultivate strong grape seedlings, virus-free grape seedlings, or lack of experience, or relax management. The key to the quality of grape seedlings lies in the management of summer and autumn.

Branch management

When the new shoots of grape seedlings raised by wiping cuttings grow to 40 cm to 50 cm in mid-July, some seedlings have several new shoots or several secondary shoots of a new shoot, which must be wiped in time to leave a strong new shoot.

Pick the heart when the new tip of the grape seedling grows to about 59cm. The secondary tip that occurs after heart removal is erased except for the one at the top. When the apical accessory tip grows to 6 leaves, leave 3 leaves to pick the heart. All regenerated tips on the secondary tip are erased.

The new shoots on the seedlings of high-grade grape varieties can be put up to 1 to 1.5 meters, and such seedlings must be tied up. You can insert a bamboo pole every 3 to 4 meters between the two rows of seedlings and pull on 2 to 3 thin iron wires or nylon ropes. Pull a line on each of the two bamboo poles. Tie two rows of seedlings to the wire or nylon rope between the bamboo poles. If the seedlings are sparse, a bamboo pole can be tied to the new shoots of each seedling.

Water, fertilizer and soil management

When the grape seedlings grow to 8 leaves, 15 kg ~ 20 kg urea is applied per mu and applied again 15 days later, usually 3 times. Topdressing outside the root is divided into 2 times, 0.5% urea is sprayed in summer, 0.3% potassium dihydrogen phosphate is sprayed in autumn, and each is sprayed twice.

Before the grape cuttings germinate, they are usually watered every 7 days. After the new tip grows to 10 cm ~ 20 cm, water is watered every half a month. After the length of the new shoot is 30cm to 40cm, water it every 20 days. If the soil moisture is good, it will not be watered. If the seedlings are not out of the nursery before winter, they should be watered for the winter. Each topdressing should be watered immediately.

Nursery beds are covered with plastic film, generally do not need ploughing, pull out weeds. Remove the ridges and weeds on both sides after each watering.

The main grape seedling diseases are downy mildew and black pox, and the pests are cotton bollworm, beet armyworm and grape armyworm. When the seedling grows to 8 leaves, spray 50% carbendazim 500 times, spray 80% spray 600 grams 800 times after half a month. After the seedlings are coring, spray 200 times Bordeaux liquid at a time. If downy mildew is found, spray 78% Cobo 600 times, or 80% ethyl phosphorus aluminum 300 times 500 times, mainly 180 times Bordeaux solution in autumn.

When the new shoots grow 7 to 8 leaves, the miscellaneous seedlings can be recognized and pulled out by the roots. Different grape varieties should be marked with bamboo slices and inserted among different varieties.

Come out of the nursery in time

Grape seedlings should not leave the nursery immediately after defoliation, which is the process that nutrients continue to be stored in the roots. It is more timely to come out of the nursery before and after "Lesser Snow".