CN115004998A

CN115004998A - Method for preventing and treating jujube witches broom

Info

Publication number: CN115004998A
Application number: CN202210878152.6A
Authority: CN
Inventors: 李秀营; 于巧玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-09-06

Abstract

The invention provides a novel method for preventing and treating jujube witches broom, wherein the jujube witches broom resistant is used for preventing and treating jujube witches broom, and the jujube witches broom resistant is grafted on jujube witches broom by adopting a method for preventing jujube witches broom from generating immunity to jujube witches broom phytoplasma or an antibody generated by the scions is used for recovering the jujube witches broom infected with the jujube witches broom. The method can convert the jujube tree species which are not resistant to the jujube witches broom into the jujube tree species which are resistant to the jujube witches broom. The method is simple and easy to implement, has low cost, and can radically cure the jujube witches broom called jujube tree cancer in a short time.

Description

Method for preventing and treating jujube witches broom

Technical Field

The invention relates to the field of agricultural disease control, in particular to a method for controlling jujube witches broom.

Background

Jujube witches broom is also called as witches broom, dragon disease, fruit growers are called as witches broom or common jujube tree, the witches broom is widely generated, is a strong infectious destructive disease caused by phytoplasma, and has various propagation ways such as insects, grafting tools and the like. In the initial stage of disease, symptoms appear on individual branches at the upper part of the jujube tree firstly, and then the jujube tree develops to the whole plant. Branches and leaves are clustered, leaves are yellowed and floral organs are degenerated, which are the main characteristics of the disease. The diseased plants are mainly represented as follows:

1. the main root of the root crazy-curcas is often grown with a cluster of short crazy-curcas due to the mass germination of adventitious buds, and the same root can be grown with a plurality of clusters of crazy-curcas. In the later stage, the diseased root cortex is rotten, and the serious one dies the whole plant.

2. The main bud and the auxiliary bud of the branch diseased tree simultaneously germinate to form a developing branch, and the branch and the leaf are clustered, the leaf is yellowed, the leaf edge is rolled up, and the branch and the leaf are hard and crisp and dull. The buds on the new branches can germinate for many times to form the cluster branches with thin and weak branches, short internodes and small and yellow leaves. The diseased branches generally do not bear fruits, and the leaves on the mad branches are not easy to fall off in winter.

3. The diseased leaves growing after the leaves bloom are long and narrow, have dark veins, are light green and easy to scorch, and sometimes 1 small dark vein piece grows on the midrib of the leaf back and is similar to the shape of a rat ear.

4. The floral organ tube of the floral organ diseased tree has a progenitor phenomenon, the pedicel, sepals, petals, stamens and pistils are degenerated into nutrient tubes such as thin and weak branches and leaves, the pedicel is lengthened by 4-5 times, the sepals, the petals and the pistils can be changed into small leaves, sometimes the pistils are changed into small branches, small branches are formed, and 2 small leaves can be occasionally taken out from the branches, so that the bearing branches are changed into fine and dense cluster branches.

5. When the whole plant is serious, the whole plant dies. The onset time of jujube tree infected with jujube witches broom is two months to one year, and the death time after onset is one year to six years, and jujube witches broom is therefore called cancer of jujube tree. The cultivation area and the yield of the red dates in China all account for more than 98% of the world, the jujube witches broom in new and old jujube areas in China occurs in different degrees, and the red date industry in China is facing the danger of being destroyed by the jujube witches broom.

The existing method for preventing and treating jujube witches broom mainly comprises the following steps:

1. the agricultural prevention and control can eliminate the mad branches and eradicate the diseased plants without economic value. Selecting disease-resistant wild jujube variety as stock. Scions, buds or roots are adopted to breed in a jujube orchard without jujube witches broom to cultivate disease-free seedlings. Strengthening orchard management, and applying alkaline fertilizer and farmyard manure additionally.

2. Drilling holes at the root and stem of the diseased trees by using a hand drill at the initial stage of disease prevention and treatment by using the medicament, and dripping 500 ml of tetracycline liquid with the concentration of 0.1 percent into each diseased tree at the sprouting stage or 10 months of the jujube trees in spring. 1 hole is drilled on each of two sides of a basal part or a middle-lower part non-scar part of a trunk, the depth reaches a medullary center, the vertical distance between the two holes is 10-20 cm, and a high-pressure injector is used for injecting an oxytetracycline liquid medicine containing 1 ten thousand units. Spraying 75-100 kg of 0.2% ferric chloride solution per mu in the initial stage of disease attack, and spraying for 1 time every 5-7 days and 2-3 times continuously.

The two methods cannot radically cure the jujube witches broom and can also repeatedly attack the jujube witches broom.

3. And (4) breeding jujube tree varieties capable of resisting jujube witches broom. Chinese scientists have collected jujube tree germplasm for resisting jujube witches broom in China since 1997, and bred a plurality of jujube witches broom resisting jujube witches broom No. 1 (also known as starlight) and 'Changyun No. 1' in sequence. However, the jujube tree fine varieties resisting the jujube witches broom all have a common characteristic: has extremely high scientific research value, but is difficult to be applied and popularized in jujube tree production. The anti-jujube witches broom varieties are difficult to popularize in actual production when the dry eating jujube selling quality is not as good as the dry eating jujube varieties such as golden silk jujube, Xinjiang jujube and the like, and when the fresh eating jujube selling quality is not as good as the staining of the fresh eating jujube varieties such as winter jujube and the like.

Disclosure of Invention

In view of the above-mentioned disadvantages of the prior art, the present invention is directed to a method for preventing and treating jujube witches broom, which solves the problems of the prior art. Grafting branches or barks of the jujube trees resisting the jujube witches broom on the jujube trees.

Furthermore, the branches are more than one year main branches, side branches or current year twigs with the diameter of 0.3-20 mm and grown on the jujube trees for resisting the jujube witches broom.

Furthermore, the grafting time of the main branches and the side branches of more than one year is mainly in spring; the optimum period for taking the annual secondary branch as the scion is 9 months, 10 days to 20 days.

Furthermore, the grafting of the jujube tree seedlings can adopt a method of cleft grafting by scissors in spring, and the fixed planting jujube trees can adopt a method of tongue grafting, abdominal grafting and bark grafting.

Further, the bark of the jujube tree branch resisting the jujube witches broom is utilized for grafting. Can be carried out in the whole growing season of the jujube trees.

Furthermore, grafting is carried out for the purpose of prevention, and the grafting position is any part of the branch of the jujube tree so as to be convenient to operate; for grafting aiming at treatment, the grafting position should be selected to graft on branches without jujube witches broom symptoms.

Furthermore, the jujube witches broom resistant jujube trees comprise jujube witches broom resistant early-maturing winter jujubes, Changyun I, and descendants and grandgenerations of other jujube tree varieties grafted by the scions of the jujube witches broom resistant jujube trees.

A method for grafting scions of jujube trees with resistance to jujube witches broom is used for constructing a new jujube tree variety breeding system with resistance to jujube witches broom.

An application of the method for preventing and treating jujube witches broom in treating the diseases caused by mycoplast-like body.

For jujube trees which are not infected with jujube witches broom, the effect of preventing jujube witches broom can be achieved only by grafting one scion or bark which resists jujube witches broom.

For jujube trees infected with jujube witches broom, the aim of recovering the plants with mild and moderate jujube witches broom can be achieved only by grafting one to a plurality of scions resisting jujube witches broom. For plants which can not be completely recovered in the current year and have yellow leaves, a jujube witches ear for resisting jujube witches can be grafted again in the spring of the next year. All the jujube trees which are grafted with the jujube witches which resist the jujube witches and become live are converted into jujube witches which resist the jujube witches, and except that the grafted branches are the quality of the grafted variety, other parts of the original jujube trees keep the original quality unchanged.

For jujube trees slightly infected with jujube witches broom branches are cut off, and only 1 jujube witches ear for resisting jujube witches broom is grafted, so that the jujube trees can not sprout new branches and leaves with jujube witches broom symptoms.

The disease-resistant factor in the jujube tree for resisting the jujube witches broom is a super-strong antibody which is a mycoplast and can be propagated in vivo, can move longitudinally and transversely in the jujube tree, and can flow between the crown and the root system along with the body fluid of the jujube tree.

Each jujube tree of anti-jujube witches 'precocious winter jujube, anti-changyun I, anti-witches I (starlight) and grafted anti-jujube witches can be used as a natural factory for collecting' vaccine 'and' medicine 'for preventing and treating jujube witches' disease.

The jujube witches broom resistant grafting spike is used for preventing and treating jujube witches broom, and has the characteristics of low cost, simplicity and feasibility, and capability of rapidly and radically treating jujube witches broom.

The jujube witches are bred to obtain a bud mutation variety with the characteristics of larger average fruit, higher soluble solid content, better mouthfeel, strong predatory performance, jujube witches resistance, 1 month earlier in maturation stage and the like. After the anti-jujube witches broom early-maturing winter jujube is grafted on the jujube witches broom tree, the winter jujube can grow normally, the leaves of the jujube witches broom can be quickly removed, and the small leaves of the jujube witches broom can be gradually enlarged until the jujube witches broom tree is normal. Only one jujube tree scion resisting jujube witches is grafted on jujube witches sensitive to jujube witches, and the jujube witches or jujube witches are grafted again, so that the jujube witches cannot be infected with jujube witches. The most important scientific findings are: the grafting spike of the jujube tree varieties resisting jujube witches broom, such as early-maturing winter jujube, witches broom 1, changyun 1 and the like, can prevent jujube witches broom like a vaccine, can recover jujube trees infected with jujube witches broom like a medicament, and can convert jujube tree varieties not resisting jujube witches broom into jujube tree varieties resisting jujube witches broom.

The experimental results show that: only one grafting ear for resisting the jujube witches broom is needed, so that the prevention rate of the jujube witches broom can reach 100! The jujube trees with mild infection and moderate infection of jujube witches broom can be recovered by only grafting 1-2 scions. Most of the crowns of the jujube trees severely infected with jujube witches broom are covered by diseased branches, the medulla of branches which do not emit branches on the surface are changed from green to grey-black, and the branches are completely blind, so that the lives of the jujube trees cannot be saved even if grafted jujube witches broom-resistant grafting ears can survive marginally, the bud return phenomenon occurs suddenly, and the whole jujube tree can die.

Chinese date tree main cultivated species are generally sensitive to phytoplasma of jujube witches broom. The method for preventing and treating jujube witches broom has the characteristics of low cost, good effect, no change of the quality characteristics of the existing main cultivars and capability of radically treating jujube witches broom in a short time.

Microorganisms are well known to be divided into three major groups, bacteria, viruses and mycoplasma-like bodies. The pathogen causing the jujube witches broom is a phytoplasma and belongs to one of bacteroid plastids. Scientists have found antibodies in both bacteria and viruses, and, to date, scientists have not found antibodies to them, except for the mycoplasma-like bodies which are smaller than bacteria and larger than viruses. This is a scientific blank that is definitely known but not yet discovered because the mycoplasts are always in an invincible state and scientists do not find sample materials rich in antibodies to the mycoplasts. Nowadays, a large amount of mycoplastoid antibodies are likely to exist in the jujube witches broom trees cured by the method, and abundant sample materials are provided for scientists to search for the mycoplastoid antibodies.

Drawings

Shown in FIG. 1 are: the first jujube tree infected with jujube witches which can be recovered immediately by grafting 1 jujube witches against jujube witches in the world. The jujube tree which is grafted on the jujube tree and is sensitive to phytoplasma of jujube witches broom can grow normally. The tree does not have any phenomena of arbuscular and floral defoliation with jujube witches' symptoms after one and a half years from grafting of the jujube witches resistant to jujube witches to taking pictures.

FIG. 2 shows that: the jujube tree grafted on the jujube tree with moderate jujube witches for resisting jujube witches broom grows to have the phenomenon that the jujube witches broom grow upwards in the early stage of grafting, and as time goes on, mouse ear-shaped witches grown on the rootstock in the lower half part gradually become small elliptic leaves like peanut leaves and finally can become normal jujube tree leaves.

FIG. 3 shows: one jujube tree infected with jujube witches disease and capable of resisting jujube witches disease rehabilitation by grafting in a three-ridge group jujube orchard in Ningjin county of Shandong province. In the photo, the crazy branches formed by the jujube witches broom infected by the tree in 2021 year are also hung on the tree, and the new branches grown in the second year in the place where the crazy branches grow in the first year according to the rule of jujube witches broom occurrence are also the crazy branches, but the tree is grafted with 2 scions resisting the jujube witches broom, and the tree survives only 1 scion, but the effect of treating the jujube witches broom is also very good. Not only normal branches grow beside the crazy branches, but also mouse ear-shaped crazy leaves growing on other two crazy branches gradually grow larger and become normal, the tree is completely recovered from the grafting of the jujube witches resisting the crazy diseases in the spring of 2022, and only three months of time are used!

FIG. 4 shows: the jujube king in Ningyang county of Shandong province has one tree aged 1600 years infected with jujube witches broom, and one branch with a thick bowl mouth is clustered. At 27/3/2022, the inventor of the present application performed this adjudicative experiment together with experts in the center of forestry protection and development in ningyang county. One scion resisting the jujube witches is grafted on each of the four sides of the tree and completely survives. In 2022, 19 days at 6 months, the jujube witches broom of the tree is completely recovered through the on-site inspection of the union working group of the county, the county and the village, the new branches have no symptom of the leaf disease of the branch, and the blossoming and fruit setting are normal.

Detailed Description

The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit of the invention.

It should be noted that the method for preventing and treating jujube witches broom provided in this embodiment is only a schematic illustration of the basic idea of the present invention, and the grafting method may be more complicated when it is actually implemented.

The method for actively infecting jujube witches broom comprises the steps of taking out diseased bark with the length of 3-5 cm and the width of 3-5 mm from a current-year jujube witches broom, cutting off bark with the same size from branches needing grafting, and grafting the bark with plastic cloth.

A method for preparing jujube tree scion or grafting bark for resisting jujube witches broom mainly comprises the following steps:

(1) the jujube tree scion for resisting jujube witches broom is made in winter and spring, 1-2 buds of 0.3-20 mm of main branches or lateral branches can be cut into scions, and the scions are stored in a refrigeration house at 0-5 ℃ after being sealed by wax for later use.

(2) In autumn, the bud grafting adopts secondary branches of the current year, and each bud is used as a scion and is adopted at any time.

(3) The preparation method of cortex Jujubae disease resisting bark comprises dividing branch bark into strips of 3-5 mm in width and 3-5 cm in length in jujube tree growing season, and collecting the strips at any time.

The method for grafting the branches and the barks comprises the following steps:

(1) grafting for prevention, wherein the grafting position of the scion is any position of the branch of the jujube tree so as to be convenient to operate; for grafting aiming at treatment, the grafting position should be selected to graft on branches without jujube witches broom symptoms. The grafting of the jujube tree seedling in spring can adopt a method of cleft grafting by scissors, and the fixed planting jujube tree adopts methods of tongue grafting, abdominal grafting, bark grafting and the like.

(2) The method of grafting the bark is the same as the above-mentioned method of actively infecting jujube witches broom.

EXAMPLE 1 prevention

Firstly, 2021, 6 months and 20 days, in a Ningjin county Xiaojiacun jujube orchard, selecting 20V-shaped 3-year-old jujube trees, treating every 5 jujube trees, respectively grafting a first anti-mad scion, a first Changyou scion and a first early-maturing jujube scion for resisting the jujube mad disease on one branch of three treated jujube trees by adopting a tongue grafting mode, adopting the other branch for comparison, not performing any jujube mad disease resisting treatment, then artificially infecting the jujube mad disease by adopting a method for grafting jujube mad disease barks on the other branch of all the treated jujube trees at the same time, observing after 2 months, wherein the three grafting scions are not infected with the jujube mad disease, a control group without grafting the jujube mad disease-resistant scion is not used for all 5 jujube plants, observing after 4 months, the three grafting scions are not treated with the jujube mad disease, and the jujube mad disease expression of the control group is already obvious.

Second, 20 days at 6 months in 2021, in a jujube orchard of Zhongjin county, village, 5 golden silk new fourth jujube trees of twenty years of age are respectively grafted with one jujube tree scion by adopting a tongue grafting method, then the jujube witches are artificially infected with the jujube witches by adopting a method of grafting jujube witches broom barks, and after 12 months of observation, the jujube witches have no expression of the jujube witches, so that the jujube witches can not be infected with the jujube witches. And the branches of the jujube witches broom appear in the 5 control jujube trees two months after the jujube witches broom bark is grafted.

And thirdly, selecting 20 winter jujube trees of 2 years in autumn in the first year, grafting the Changyun first bark on 10 winter jujube trees, taking 10 winter jujube trees as a comparison, grafting the jujube witches first bark on the jujube trees grafted with the Changyun first bark in the second year in 6 months, observing for 2 months, and grafting the jujube witches first bark which is not infected with the witches first bark. Compared with the method of grafting the jujube witches broom bark by using the same infection source, the jujube witches broom infection rate is 100!

Example 2 in addition to the above tests, the applicant of the present application also treated the jujube tree which had been infected, and the following treatments were all carried out on site, and changes in jujube witches broom tree were recorded using images.

A5-year-old jujube tree infected with jujube witches broom in a three-ridge group jujube orchard in Ningjin county is grafted with a Changyun I scion on branches not infected with jujube witches broom by adopting a tongue grafting method. The tree has no arbuscular and floral defoliation phenomenon with jujube witches broom symptoms all the time after one and a half years from grafting of the jujube witches resisting jujube witches to taking pictures. The jujube tree which is grafted on the jujube tree and is sensitive to phytoplasma of jujube witches broom can grow normally.

The method is characterized in that two jujube trees with one resistance to jujube witches broom are grafted on the other jujube tree infected with jujube witches broom in a tongue grafting mode, the jujube witches broom is cured within 3 months under the condition that one of the scions is not alive, the image records the evolution process that the jujube witches broom leaves are gradually changed into normal jujube leaves from mouse ears, particularly, more crazy branches are originally grown beside dry jujube witches broom branches which are not fallen off in the past year, and a new branch without jujube witches broom symptoms is grown! Only jujube witches broom leaves with the size of the order of rat originally grow to the size of a monobasic coin after the whole tree recovers.

Secondly, after a jujube tree in Hanzhuancun in mountain pavilion area of Zaozhuang city is infected with jujube witches broom, grafting a jujube tree scion of Changyun ciona by adopting a bark-inserting grafting method, wherein the jujube witches broom leaves on the rootstock in the shape of mouse ears gradually become ellipses similar to peanut leaves, and finally become normal jujube leaves! After the jujube witches broom bark is grafted on the current-year jujube witches broom-resistant early-maturing winter jujube branches on the crown of the tree, not only the symptoms of the jujube witches broom do not appear in more than one year, but also no jujube witches broom phytoplasma is found through detection of Shandong province fruit tree research institute.

Thirdly, for the jujube trees with higher age and infected with the jujube witches broom, a method of grafting one anti-jujube witches broom grafting on all the sides of the big trees is adopted for treatment. A famous tree in Ningyang county Heishiki village, with the age of 1600 years, is infected with jujube witches broom, and a large number of branches and leaves of the jujube witches broom caused by the jujube witches broom appear on a branch with a thick bowl mouth on the tree. 8 branches are selected in eight directions of the tree, 4 scions of Changyun I are respectively grafted in a tongue grafting mode, 4 scions of jujube witches are resistant to jujube witches broom prematurity, and the scions of winter jujubes completely survive. The treatment method can make the ancient tree which is called 'jujube king' by local masses begin to die and survive for more than 3 months.

Fourthly, at the same time, the judgment experiment of using the jujube tree scion for preventing and treating the jujube witches broom, which is participated by the third grade cadres in counties and villages in the counties, is successfully carried out in the counties.

And fifthly, for the jujube trees which have the pulp cores in the jujube branches changed into gray black, most of the crowns of the jujube trees are covered by jujube mad branches and are seriously infected with the jujube mad diseases, the diseased plants are recommended to be removed in time without being cured by the method. A golden silk new No. four jujube tree heavily infected with jujube witches broom in a DongShacun jujube orchard in Ningjin county has the advantages that the medulla of branches of the jujube tree is changed from normal green to grey black, and when branches grown by grafted jujube witches resisting jujube witches broom grow to be about 15 cm long, the bud return phenomenon suddenly occurs, and the whole jujube tree dies. Practice shows that the purpose of causing the jujube tree to die and survive is not achieved by using a method for grafting the jujube witches resisting the jujube witches to treat the jujube tree which is infected with the amaurosis and has black pith.

Example 3

A method for breeding jujube witches resistant to jujube witches broom by utilizing jujube witches resistant to jujube witches broom comprises the following steps: grafting the wax-sealed scion of the jujube tree resistant to the jujube witches on the stock of the jujube tree in spring to obtain a jujube witches resistant to the jujube witches; in autumn, the jujube witches secondary branches of the jujube tree resisting the jujube witches broom are used for bud grafting on the wild jujube stocks, and then the jujube witches broom-resistant saplings can be obtained.

In a jujube tree seedling breeding base in Gaozhuangcun, Ningjin county, jujube seedlings which resist jujube witches broom, such as jujube witches broom, early maturing winter jujubes, first crazy resistant jujube witches, first new golden silk and fourth crazy resistant jujube witches are grafted, and a plurality of jujube tree varieties which do not resist jujube witches broom are also grafted. 10 seedlings of all the jujube seedlings are respectively selected and grafted with jujube witches broom bark, and as a result, the jujube witches broom incidence of the jujube witches broom resistant jujube witches broom is zero, and the jujube witches broom incidence of the jujube witches broom non-resistant jujube witches broom is 100! After the jujube seedlings infected with the jujube witches broom are grafted with the scions resisting the jujube witches broom, the recovery rate of the jujube witches broom is 100!

Example 4

A method for constructing a jujube witches broom resistant jujube tree breeding system by using a jujube witches broom resistant jujube tree scion grafting method comprises the following steps:

the jujube tree fine variety which does not resist the jujube witches broom is converted into the jujube witches broom resistant jujube tree fine variety by the method of grafting the jujube witches broom resistant scions, and the jujube witches broom resistant jujube tree fine variety has the advantage of resisting the jujube witches broom on the premise of not changing the biological characteristics of the original jujube tree fine variety. All new jujube tree species newly bred in the future can be changed into new jujube tree species with the ability of resisting jujube witches broom by grafting the jujube witches resisting jujube witches broom. At present, a plurality of new jujube tree species resisting jujube witches broom, golden silk jujube, winter jujube, cucurbit jujube, dragon jujube, flat jujube and the like resisting jujube witches broom are cultivated by the method.

Scientific research value is as follows: a large amount of mycoplast-like antibodies may exist on the jujube witches resisting the jujube witches or on the jujube witches rehabilitating by grafting the jujube witches resisting the jujube witches, and sample materials can be provided for scientists to search for the mycoplast-like antibodies.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

Claims

1. A method for preventing and treating jujube witches broom is characterized in that: grafting branches or barks of the jujube trees resisting the jujube witches broom on the jujube trees.

2. The method for preventing and treating jujube witches broom as claimed in claim 1, wherein: the branch is an annual main branch, a lateral branch or an annual twig with the diameter of 0.3-20 mm grown on the jujube tree for resisting jujube witches broom.

3. The method for preventing and treating jujube witches broom as claimed in claim 2, wherein: the grafting time of the main branch and the lateral branch growing for more than one year is mainly in spring; the optimum period for grafting the annual secondary branches is 9 months and 10 days to 20 days.

4. The method for preventing and treating jujube witches broom as claimed in claim 1, wherein: the scissoring method can be adopted in spring for grafting the jujube seedlings, and the tongue grafting, the abdominal grafting and the bark grafting can be adopted for the fixedly planted jujube trees.

5. The method for preventing and treating jujube witches broom as claimed in claim 1, wherein: the bark of the jujube tree branch resisting the jujube witches broom is used for grafting, and can be carried out in the whole jujube growing season.

6. The method for preventing and treating jujube witches broom as claimed in claim 1, wherein: grafting for prevention, wherein the grafting position is any part of the branch of the jujube tree so as to be convenient to operate; for grafting aiming at treatment, the grafting position should be selected to graft on branches without jujube witches broom symptoms.

7. The method for preventing and treating jujube witches broom as claimed in claim 1, wherein: the jujube tree for resisting the jujube witches broom comprises jujube witches broom resisting premature winter jujubes, Changyun I and Changyun I, and descendants and granddescendants of other jujube tree varieties grafted by the jujube witches.

8. A method for grafting scions of jujube trees with resistance to jujube witches broom is used for constructing a new jujube tree variety breeding system with resistance to jujube witches broom.

9. An application of the method for preventing and treating jujube witches broom in treating the diseases caused by mycoplast-like body.