1. It is necessary to prevent green blind bugs and bugs from harming young fruits and young leaves. The green blind bug is small, overlapping generations, and is good at hiding. Adults have strong migratory ability and move to disperse hazards. It is not easy to be found in the egg production tissue, which makes it difficult to prevent and control. Prevention and control methods: Before the fruit trees germinate, before and after flowering, use emamectin benzoate and cypermethrin to spray the whole garden. Bugs are also called bugs. It is also in mid-April that it begins to harm young fruits, and it is not a commercial fruit after biting.
2. For young trees and spinning trees, the traditional twisting time in the textbook is mid-May. When the new shoots on the back of the main branch grow to more than 30 cm, leave 5 to 7 cm long from the base and the twisted tips droop. However, because the shoots are too long when twisting the tip, it is difficult to become a flower, and an upright strip will grow at the bend of the twisted tip, and the winter shears must be cut off. Because 20 cm long stop growing is the easiest to flower, I am mid-April to late April, when the erect young shoots on the back of the main branch grow to about 20 cm long, the base of the young shoots has formed semi-woody, twisting the tips from the base, becoming erect or slightly drooping, and flower buds can be formed in that year. There are also very few upright strips on winter cut trees.
3. Thinning the fruit as soon as possible, setting the fruit, practice has proved that the fruit is set within 20 days after flowering, not only the young fruit is large and the pile is high, but also easy to become a flower year after year. If the fruit is set 1 month after flowering, the young fruit has grown to the size of a hawthorn fruit, and these sparse young fruits have consumed a lot of nutrients, not only the young fruit is small and there is no early fruit high pile. Because the fruit is set late, it affects the early accumulation of nutrients into flowers.
4. 7 to 10 days after flowering, it is necessary to inject bactericidal and insecticidal drugs, and add red spider and bud worm medicines, as well as calcium. Before bagging, it is necessary to take 3 times of medicine to protect the fruit, prevent insects, prevent diseases, and supplement calcium, which everyone knows. The problem is that the first medicine after the flower is too late, I don't know when the time is "after the flower", how to calculate the first day? Someone said to me that he is the first medicine after the flower on this day every year. Some people say that he waits for the whole garden to finish the flowers, and then stops for 7 to 10 days to get the first medicine. I say that varieties with axillary buds have a long flowering period. The flowering period is long in the year of low temperature, last year Lingbao base from the first flower to the end of the flower piece up to 22 days, but most years of the flowering period is only 7 to 10 days after the flower piece falls, every year with a fixed time to spray is not good, right?
5. Powdery mildew is a special effect on it. However, it is inevitable that there will be "fish that slip through the net", and they should be cut off immediately during the full flowering period and after flowering and taken out of the orchard to prevent infection.
6. When there are many fruits on the tree and the flowers of the axillary flower buds have not fallen, they should be thinned as soon as possible to prevent continued consumption of nutrients.
7. Continue to check and scrape to treat rot disease, and large wounds should be bridged. It is conducive to the early recovery of the tree, and if the rot and disease wound are large, try not to leave fruit or less fruit.
8. For the trees with many pruning wounds last winter, the wound will grow more erect shoots, and finally grow into long strips, I don't want to let the tree have too many long strips, wipe off the tender shoots at the wound after thanking the flowers, and finally there will be fewer long strips on the tree.
9. When the fruit is set, there are many weak branches and young fruit seats, which can be appropriately retracted. Because the retraction reaction after flowering is not the same as the retraction reaction of winter pruning. Winter shears retract and store more nutrients, pruning reaction is strong, and there are many long strips. Retract after flowering, store nutrients because flowering and fruit consume more nutrients, plus there are fruit pressure branches, can only grow fruits, will not emerge long strips, of course, to moderate retraction.
10. The fruit should be 6 to stay and 6 not to stay:
(1) Fruits with large leaves and many leaves on the fruit retention table. Do not leave fruit moss with small leaves and few leaves.
(2) Leave fruit-shaped high pile fruits, do not leave round egg fruits, high pile fruits can grow, round egg eggs do not grow big.
(3) Leave medium and long fruit branches and fruits, and try not to leave short branches and fruits, because the fruits of medium and long fruit branches. When it grows up, it will sag, and it is easy to be completely red. And the shape of the fruit is right, but the short branch fruit is a semi-red fruit, and it can be full red unless you turn the fruit.
(4) One side branch leaves the middle fruit, but not the base and tip fruit. Because the base and tip fruit do not grow much. This is also the same as planting cotton, the horn flowers are not good, the tip flowers are not good, only the waist flowers are good. It is also the same as planting watermelons, horn melons do not grow big, and shoot melons do not grow big, only waist melons can grow.
(5) Leave the big but not the small, the big fruit is the fruit of the high quality of the flower bud, it is rich in the womb, the fruit can grow, and the fruit is small.
(6) Do not leave axillary flower buds, axillary flower buds only begin to differentiate in mid-September, and the quality of flower buds is poor, so the fruit is not large. Keep medium and long fruit branches. Of course, short-branched trees bear fruit with short branches, and the fruits of medium-long branches are not as large as those of short-branched fruits. This is determined by the characteristics of the variety.
Author: He Jucai, lecturer of Zhongnong Le Fruit Science Research Institute
Source: Zhongnongle