TW201427595A - The invention is described the use of chlorine dioxide solution to prevent or cure brown root rot disease of plants - Google Patents

Abstract

The invention is described the use of chlorine dioxide solution to prevent or cure brown root rot disease of plants. The composition of chlorine dioxide solution is made by chlorine dioxide gas dissolving in water and is the active ingredients to effectively eliminate or prevent brown root rot bacteria infecting to plants.

Description

Composition and method for controlling brown root disease of trees

The invention relates to a composition and a method for controlling brown root disease of trees, in particular to a composition for treating and controlling trees and planting brown root pathogens with the composition of chlorine dioxide aqueous solution as an active ingredient, and a method for treating and preventing the same.

Tree brown root disease is an important root disease in forests, fruit trees and special effects in tropical, subtropical Asia, Australia and Africa; the root browning disease is caused by brown root pathogen (Pseudoporus sinensis) (Phellinus) Noxius (Corner) Cunningham) is parasitic on the roots of trees, causing the roots of trees to become corrupt and causing the whole plant to wither and die. In particular, since the brown root pathogens rarely form fruit bodies in nature and are not easily found, they are roots of trees rooted in brown root pathogens. When the base of the stem has a brown or dark brown mycelium surface, or the wood cut surface has a yellow-brown mesh belt, the ricket tree has been seriously infested by the brown root pathogen and the whole plant has withered.

When the tree has the symptoms of brown root disease, more than 60~70% of the roots are affected, and the plants with brown root disease can not be treated. Only the rickets and roots can be excavated and burned, and the brown root disease can not be caused. The trees have to survive and cannot preserve the commemorative or centuries-old trees. On the other hand, the Jiankang plants in the ward also need to be prevented to avoid the roots and pathogens remaining in the soil. To replanted trees, and the method of prevention and treatment includes a trenching blocking method, a fumigant treatment method soil method, a flooding treatment method, and a chemical mixing method. The soil cover method or the dilution infusion method, etc.; the above-mentioned control method requires a large amount of manpower, uses large machinery and chemicals to treat, and is easily limited by topographical factors and affects the treatment method and effect, and cannot effectively eliminate the brown root pathogen.

The main object of the present invention is to provide a chlorine dioxide aqueous solution composition which can effectively treat trees and plant brown root disease, and the composition of the chlorine dioxide aqueous solution kills and controls parasitic roots and plants. The brown root pathogen can make trees and plants not survive due to browning and withering death, and is not affected by the chemical action of the chlorine dioxide aqueous solution composition.

Another object of the present invention is to provide a method for controlling a tree and planting brown root disease, which is characterized in that a tree of chlorine-infected bacteria is treated with a chlorine dioxide aqueous solution composition, and the plant is planted to effectively prevent and kill parasitism. Roots of trees, brown root pathogens on plants.

Another object of the present invention is to provide a method for protecting brown root disease of trees, which is characterized in that trees and plants are pre-treated with a composition of an aqueous solution of chlorine dioxide to prevent parasitic bacteria from parasitizing on roots and plants of trees. Achieve effective prevention.

In order to achieve the above object, the chlorine dioxide aqueous solution composition of the present invention dissolves the chlorine dioxide gas in water to form a chlorine dioxide aqueous solution composition, and the chlorine dioxide aqueous solution composition is used to treat the tree infected with the brown root pathogen. Planting, in order to prevent the killing of the roots of the trees and the planting of the brown root pathogens, so that the infected trees and plants can survive without causing death, and can treat trees and plants that are not infected with brown root pathogens, so as to effectively prevent them. Brown root pathogen.

The method for treating tree and planting brown root disease according to the present invention is not particularly limited, and is, for example, a tree infusion treatment, a soil treatment under a canopy, a stem and leaf treatment, a coating treatment, etc. The method of treating the trees with the oxidized chlorine aqueous solution composition can be used.

The method for treating the tree and planting brown root disease of the present invention is not particularly limited, and for example, a tree body injection treatment, a soil treatment under the canopy, a stem and leaf treatment, a coating treatment, etc. be usable.

Fig. 1 is a photograph showing the mycelial growth of the control group xylem dicing of the composition of the present invention without the impregnation of the aqueous solution of chlorine dioxide.

Fig. 2 is a photograph showing the mycelial growth of the xylem dicing of the experimental group in which the composition of the present invention was immersed in different concentrations of chlorine dioxide aqueous solution.

Fig. 3 is a graph showing the growth curve of the root group of the control group and the experimental group of the present invention.

Fig. 4 is a photograph showing the hyphal growth of the experimental group in which the composition of the present invention was immersed in different concentrations of chlorine dioxide aqueous solution.

Fig. 5 is a photograph showing the growth of the seedlings of the three groups of the experimental group and the control group of the present invention after being implanted with the wrap of the Rhizoctonia solani for 2 weeks, and the healthy group was implanted with the sterile wheat grain medium 2 through the plastic wrap. Growth photographs after 2 weeks of coating treatment.

Fig. 6 is a photograph showing the growth of the eucalyptus seedlings of the three experimental groups, the control group and the healthy group of the present invention after 16 days of watering the aqueous solution of the dihydrate.

Fig. 7 is a photograph showing the growth of the eucalyptus seedlings of the experimental group, the control group and the healthy group of the present invention after 60 days of watering the aqueous solution of the oxidizing dew.

Fig. 8 is a photograph showing the growth of the eucalyptus seedlings of the three experimental groups, the control group and the healthy group of the present invention after 60 days of watering and changing the general tap water.

Fig. 9 is a photograph showing the stem section of the eucalyptus seedlings of the three experimental groups, the control group and the healthy group of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The technical means for achieving the object of the present invention are described in detail below. Generally, according to the present invention, the optimum composition is prepared by dissolving chlorine dioxide (ClO ₂ ) gas in water to form a chlorine dioxide aqueous solution composition. The chlorine dioxide gas (ClO ₂ ) is produced by electrolytic sodium chloride (NaCl) aqueous solution to obtain chlorine dioxide gas (ClO ₂ ) without other impurities; the chlorine dioxide (ClO ₂ ) gas is dissolved. After forming a composition of an aqueous solution of chlorine dioxide in water, it can be used to treat brown root disease of trees as a component for effectively treating and controlling brown root disease of trees.

The chlorine dioxide aqueous solution composition has the functions of sterilization and disinfection, in particular, the chlorine dioxide has strong adsorption and penetration ability to the microbial cell wall, and can effectively oxidize the enzyme in the cell, so the root root and the planted brown root pathogen are planted. It can effectively inhibit the growth of the root-inhibiting bacteria, and can kill the brown root pathogens that are parasitic on the roots of the trees and the plants, so that the trees and plants are not browned and withered and died; in particular, the chlorine dioxide aqueous solution composition It does not cause any inhibition or interference or killing effect on trees or planting, or other chemical effects, so that trees and plants can survive.

The tree species and planting used in the above-mentioned composition of the aqueous chlorine dioxide solution are not particularly limited, and the fruit trees such as longan, lychee, lychee, plum, medlar, soft lychee, cocoa, passion fruit, rags, etc. Or ornamental trees such as jasmine, scutellaria, yellow oleander, golden dew, western rhododendron, Christmas red, cherry blossom, golden wind chime, environmental greening trees, park street trees, rubber trees, tea trees, oil coconuts, coconuts and fast-growing acacia trees, or Such as strawberry, watermelon, bitter gourd, pineapple, taro, etc., can use the chlorine dioxide aqueous solution composition as an effective treatment for the prevention of brown root disease bacteria to kill the root roots of the roots, and let the diseased tree Wood and planting can continue to survive without browning and withering death.

The method for controlling the plant according to the present invention for controlling trees and planting brown root pathogens is not particularly limited, and examples thereof include a method of injecting a tree, a soil treatment under a canopy, a treatment of stems and leaves, a coating treatment, and the like; The body injection treatment injects the chlorine dioxide aqueous solution composition into the trunk or its root system, so that the chlorine dioxide aqueous solution composition can be circulated to inhibit the killing of the brown root pathogen; the soil treatment under the canopy is to artificially prepare the chlorine dioxide aqueous solution composition. Or the machine is scattered, perfused in the canopy, and the soil under the planting, so that the chlorine dioxide aqueous solution composition can penetrate into the tree and the root of the plant to inhibit the killing of the brown root pathogen; the stem and leaf treatment is to form the chlorine dioxide aqueous solution composition. Artificially or mechanically dispersed or infused into trees, stems and leaves of plants, so that the composition of the aqueous solution of chlorine dioxide can be circulated to inhibit the killing of Rhizoctonia solani; the coating treatment is to prepare the aqueous solution of chlorine dioxide to an appropriate concentration. In order to coat the trees and plant the diseased area to inhibit the killing of the brown root pathogen. Regardless of the method used, the chlorine dioxide aqueous solution composition is infiltrated into trees and plants as an active ingredient, thereby preventing the killing of the brown root pathogen, so that the local treatment method can be used to achieve the therapeutic control effect, in particular, The use of the chlorine dioxide aqueous solution composition can prevent the parasitic roots of the trees and the planting of the brown root pathogens, and does not use other chemical agents to treat, so that the trees and plants are not killed by the influence of chemical agents, and thus Continue to survive, and then avoid commemorative, commercial trees, endemic or rare species of trees, planting browning due to infection with brown root pathogens, and withering death.

The chlorine dioxide aqueous solution composition of the present invention can be used as an effective treatment for the diseases of the trees and planting of the brown root pathogen to prevent the growth and killing of the tree and the planting rhizogenes, and the chlorine dioxide aqueous solution composition It can also be pre-treated to use trees that are infiltrated into uninfected brown root pathogens, planted in plants, to prevent health, and to plant plants for contact with alfalfa for brown root disease trees. Roots, or contact with diseased seedlings and diseased soils to infect brown root pathogens; and can be treated in the early stages before trees, planting infections, or unidentified brown root pathogens, so as to instantly eliminate and inhibit the growth of brown root pathogens. Trees and plants are not infected, deteriorated, and browned and withered, which can effectively prevent trees and plants from infecting brown root pathogens. The method for treating trees and planting brown root pathogens of the composition of the present invention is not particularly limited, and examples thereof include a tree infusion treatment, a soil treatment under the canopy, a stem and leaf treatment, a coating treatment, and the like.

In order to prove that the composition of the aqueous chlorine dioxide solution of the present invention has the function of killing and preventing brown root disease, the inventors, the following test examples, have proved that the composition of the aqueous chlorine dioxide solution has the effect of controlling the brown root pathogen:

Test example 1

The xylem dicing with the brown root pathogen is obtained, and the xylem diced piece is separated and purified, and then the xylem portion has only the brown fungus hyphae and no other bacteria. The xylem stalk was further cultivated, and the purified brown root pathogen was obtained, cultured and stored. The mycelium was grown by culturing the purified Rhizoctonia solani on PDA solid medium, and the mycelial mass was taken out from the mycelium.

After soaking the hyphae of the Rhizoctonia solani in the concentration of 20ppm, 200ppm or 2000ppm chlorine dioxide solution for 15 minutes, the hyphae were taken out and attached to the 9cm PDA solid medium to be cultured as the experimental group, and the brown root pathogen was taken. The mycelial mass was attached to a 9 cm PDA solid medium as a control group, and the control group was not immersed with a chlorine dioxide aqueous solution composition; the growth of the mycelium with brown root pathogen was observed 10 days later.

As shown in Fig. 1, in the control group of the unsoaked chlorine dioxide aqueous solution composition, the hyphae of the Rhizoctonia solani hyphae have been grown on the culture tray (white hyphae as shown).

As shown in Fig. 2, the brown root pathogen on the hyphae was not grown in the hyphae of the Rhizoctonia solani in the composition of the aqueous solution of chlorine dioxide of 20 ppm, 200 ppm or 2000 ppm.

From the above-mentioned test example 1 and the photographs of the first and second graphs, and the growth graph of the third graph, it can be seen that the brown root pathogen hyphae of the unsoaked chlorine dioxide aqueous solution composition is on the eighth day, The mycelium of Rhizoctonia solani has been grown in a culture plate with a diameter of 9 cm, and the hyphae of the Rhizoctonia solani in the composition of the aqueous solution of chlorine dioxide was observed. On the 10th day, the bacteria of the root pathogen were observed. The silk block obviously has no mycelial growth and diffusion; therefore, the chlorine dioxide aqueous solution composition can effectively inhibit the growth of the brown root pathogen, and can kill the brown root pathogen on the hyphae.

Test example 2

A few pieces of hyphae cut about 0.5-1.0 cm ² were placed on a white-brown brown fungus with a scalpel and placed in a liquid medium (1.5 g Potato Dextrose Broth/50 mL H ₂ O) for 2 to 3 days. After the hyphae are grown, the ultrasonic solution is used to ultrasonically oscillate the bacterial liquid for 1 minute to obtain a suspended liquid of the shredded hyphae, which is composed of a different concentration (0, 20, 200, 1000 ppm) of chlorine dioxide aqueous solution. The mixture was mixed in a volume of 1:1 (suspended liquid: aqueous chlorine dioxide solution) and allowed to stand for 20 minutes; then, 50 μL of the mixed liquid was placed in fresh PDA plate medium (3 g Potato Dextrose Broth, 1.5 g Agar/100 mL H). ₂ O) Central, after storage, store for 3 days, and observe the mycelial growth.

As shown in Fig. 4, the Rhizoctonia solani treated with the chlorine dioxide-free aqueous solution composition (0 ppm) has a growth diameter of 2.0 cm, and the Rhizoctonia solani treated with the 10 ppm aqueous chlorine dioxide solution has a growth diameter of 1.5 cm. The brown root pathogen treated by the 100 ppm aqueous solution of chlorine dioxide has a growth diameter of 1.5 cm, and the treated body of the 500 ppm aqueous chlorine dioxide solution is brown. The root pathogen has a growth diameter of 0 cm; at the same time, the growth thickness of the Rhizoctonia solani treated with the 10 ppm chlorine dioxide aqueous solution composition is also significantly thinner than the growth thickness of the 0 ppm chlorine dioxide aqueous solution treated brown root pathogen, the 100 ppm dioxide The growth thickness of the Rhizoctonia solani treated with the chlorine solution composition is also significantly thinner than the growth thickness of the Rhizoctonia solani treated with the 10 ppm chlorine dioxide aqueous solution composition, and the 500 ppm chlorine dioxide aqueous solution composition can completely inhibit the brown root pathogen Growing people.

Instance

Culture of bacterial mother and infection treatment: Take 0.5cm ^{2 of} Rhizoctonia solani mycelium and place it in wheat grain medium (take 25g wheat, 25g oat, 25mL RO water), and incubate at 24 °C for about 1 month to form bacteria. Mother, then take 4 strains of eucalyptus seedlings of 1~2 years old, and scrape off the basal epidermis on the stems of the four eucalyptus seedlings above the soil to form a wound, and implant the above-mentioned bacterial root of the brown root pathogen And the wounds were covered with plastic wrap for 2 weeks, so that the four eucalyptus seedlings were infected with the brown root pathogen, so that one of them was used as the control group, and three of them were used as the experimental group of A, B and C respectively; The eucalyptus seedlings of 1 to 2 years old are also scraped off the basal epidermis to form a wound on the stem above the soil, and the sterile wheat grain medium is implanted in the wound as a healthy group without infected brown root pathogen.

Watering treatment of chlorine dioxide aqueous solution composition: compounding a concentration of 20ppm, 200ppm and 1000ppm of chlorine dioxide aqueous solution, respectively, so that the experimental group A watered 20ppm 200mL chlorine dioxide aqueous solution composition in the root soil every 4 days, so that In the experimental group B, 200 ml of a 200 mL aqueous solution of chlorine dioxide was poured into the root soil every 4 days, and the C experimental group was poured with a concentration of 1000 ppm of 200 mL of a chlorine dioxide aqueous solution per 10 days in the root soil, and the control group and the control group were In the health group, 200 mL of normal tap water was poured every 4 days. After 90 days of watering the chlorine dioxide aqueous solution composition, the experimental groups of A, B and C were changed to general tap water. water. Observe the growth of eucalyptus seedlings in the experimental group, control group and healthy group of A, B and C, and record them.

Experimental results:

As shown in Fig. 5, the growth photographs of the eucalyptus seedlings of the experimental group A and B, and the control group were implanted with the wrap of the Rhizoctonia solani for 2 weeks. The healthy group is a photograph of the growth of the sterile wheat grain medium after being coated with plastic wrap for 2 weeks; from the above photos, the seedlings of the A, B, C experimental group and the control group have not been significantly browned. The effect of root bacteria.

As shown in Figure 6, it is the beginning of the A, B, C experimental group watering chlorine dioxide aqueous solution composition for 16 days (watering 4 times) and the control group and the health group watering the general tap water for 16 days (watering 4 times) The photos of the growth; the eucalyptus seedlings of the control group and the A experimental group are not seriously infected with the brown root pathogen, and the appearance is still healthy, but the growth of the new leaves has begun to slow down, and the tips of the leaves that grow are not so healthy. The shape of the eucalyptus seedlings in the B and C experimental groups appeared to be less affected by the brown root pathogen, and the growth rate of the new leaves was faster than that of the control group and the A experimental group, while the healthy group was healthy and normal. Growing.

As shown in Figure 7, it is the A, B, C experimental group watering chlorine dioxide aqueous solution composition for 60 days (15 times watering) and the growth of the control group and the healthy group after pouring ordinary tap water for 60 days (15 times watering) Photo; the healthy group is healthy and healthy, and the eucalyptus seedlings of the experimental group and the control group are slow-growing and yellowish, obviously affected by the brown root pathogen, and the appearance of the eucalyptus seedlings of the B and C experimental groups Healthy and continuous normal growth, which is similar to the healthy health group; therefore, the 200ppm and 1000ppm chlorine dioxide aqueous solution composition not only does not cause damage to the eucalyptus seedlings, and obviously inhibits the aggravation of the brown root pathogen .

As shown in Fig. 8, the experimental group of the A, B, and C groups was changed to a photograph of growth after 30 days of general tap water pouring. The control group and the health group continued to administer tap water; the eucalyptus seedlings in the healthy group were healthy growth, and the upper leaves were semi-coke yellow, which should be caused by excessive sunlight, and the lower half was not subjected to strong sun exposure. The healthy green leaves are comparable, and the eucalyptus seedlings of the A experimental group are quickly yellow and deciduous, the new leaves are very weak and easy to fall, and the new leaves are not able to be smoothly sent out, and their physiological functions are significantly reduced; The eucalyptus seedlings of the B and C experimental groups grew well, and the leaves were as vigorous as the healthy group and their leaf sizes were similar, and there was no unhealthy reaction with slow growth or deformation; while the control group had not only yellow, deciduous, and leaves The growth is slow and the shape of the leaves is curled, and it is also impossible to smoothly regenerate the leaves, which is strongly affected by the brown root pathogen.

As shown in Figure 9, the photographs of the stems of the roots of the eucalyptus seedlings in the experimental group, the control group and the healthy group of the A, B, and C groups, the trees infected with the brown root pathogen have a significant brown mesh pattern and Two characteristics of wood white rot; the A experimental group can see that the xylem has clear brown lines, and some of it has begun to produce wood white rot. It is obvious that the composition of 20ppm chlorine dioxide aqueous solution can not effectively inhibit the damage of brown root pathogen; The brown netting of the B experimental group is not obvious, and the block of wood white rot is also smaller than that of the A experimental group. Therefore, the composition of the 200 ppm aqueous solution of chlorine dioxide can inhibit the damage of the brown root pathogen and significantly reduce the symptoms. There was no brown netting and woody white rot in the C experimental group. Therefore, the composition of the aqueous solution of chlorine dioxide at a concentration of 1000 ppm was obviously effective in inhibiting the damage of the brown root pathogen and preventing the brown root pathogen; and the slice of the control group There are conspicuous brown rough lines, and nearly 50% of the area has wood white rot. The annual ring marks are also obscured by brown root bacteria erosion; while the healthy group has no brown mesh at all. Road and white rot of wood, and which ring is clearly visible.

From the two test examples of the in vitro inhibition test of the brown root pathogen and the example of the seedling of the eucalyptus seedling, the composition of the chlorine dioxide aqueous solution as an effective component for treating the brown root disease preventing bacteria is inhibited in vitro by the brown root disease bacteria. In the second experiment, the composition of the aqueous solution of chlorine dioxide in the range of 10 to 20 ppm can obviously inhibit the growth of the hyphae of brown root disease. With the increase of the concentration of the aqueous solution of chlorine dioxide, the effect of inhibiting the growth of the rhizomes of brown root disease is also more obvious. The composition of the aqueous solution of chlorine dioxide at 1000 ppm apparently completely inhibited the growth of the rhizomes of the rhizosphere. The experimental model of the infection of eucalyptus seedlings with brown root pathogen is an acute mode of planting brown root pathogens. This model is not the same as the chronic infection of plants infected with brown root pathogens in the field or in the field. The process of pathogens is slow, and the symptoms are also slow to show; therefore, the planting of the acute mode of the Rhizoctonia solani has obvious and serious symptoms in a short period of time, similar to the general field or wild brown root pathogens. Infected plants, terminal symptoms. Therefore, it can be seen from the above experiments that the high concentration of the chlorine dioxide aqueous solution composition can effectively prevent the damage of the brown root pathogen, while the concentration of 20 ppm does not completely inhibit the effect of the brown root pathogen on the eucalyptus seedlings, but it also shows that it can be slightly delayed. The effect of the symptoms of brown root disease is progressing; the effect of inhibiting the symptoms of brown root disease is more obvious as the concentration of the aqueous solution of chlorine dioxide increases. The composition of the aqueous solution of chlorine dioxide at 1000 ppm is obviously effective for inhibiting the damage of the brown root pathogen. Therefore, the composition of the aqueous solution of chlorine dioxide can effectively inhibit the effects of the brown root pathogen on trees and planting, and can prevent the deterioration and spread of the brown root pathogen in trees and plants, and inhibit the killing of the brown root pathogen. It can effectively control the root brown fungus of trees; at the same time, it can adjust the concentration of chlorine dioxide aqueous solution composition according to the degree of tree roots, planting and suffering of brown root disease and the size of trees, planting varieties and growth, so as to increase chlorine dioxide. The aqueous solution composition inhibits the effect of killing the brown root pathogen.

In addition, the chlorine dioxide aqueous solution composition of the present invention may optionally be added with a nutrient Or fertilizer, so that during the period of killing and inhibiting Rhizoctonia solani, trees and plants can simultaneously absorb nutrients or fertilizers to improve the vitality and resistance of trees and plants, so that trees and plants that can bear brown root pathogens can be borrowed. The composition of the aqueous solution of chlorine dioxide kills and prevents the rooting bacteria, and can supplement the growth nutrients with nutrients, so that the trees can survive effectively without dying.

Moreover, it can be seen from the experimental group eucalyptus seedlings that the composition of the aqueous chlorine dioxide solution does not affect the physiological function and leaf growth of the eucalyptus seedlings, and therefore, the chlorine dioxide aqueous solution composition of the present invention is effective. Make trees effective against brown root pathogens, avoid infection, deterioration and browning.

In summary, the chlorine dioxide aqueous solution composition and the control method used in the present invention can effectively prevent trees and planted brown root pathogens, and can also avoid healthy trees and planting infected brown root pathogens; therefore, this The invention is better than the previous method of trenching blocking method, fumigant treatment soil method, flooding treatment method, chemical soil covering method or dilution infusion method, etc., and the chlorine dioxide aqueous solution composition of the invention is also The invention does not affect the physiological functions of trees and planting. Therefore, the present invention has significant progress, and it has never been before. Cheng has already complied with the patent requirements of the invention, and filed a patent application according to law, and prayed for a patent for prayer.

However, the above description is only one of the possible embodiments of the present invention, and thus the scope of the present invention is not limited thereto, and the equivalent changes and modifications according to the description of the present invention and the scope of the patent application should still belong to the present invention. Within the scope of the invention.

Claims (4)

The invention relates to a composition for controlling tree roots and planting brown root path bacteria, which dissolves chlorine dioxide gas in water to form a chlorine dioxide aqueous solution composition; and uses the chlorine dioxide aqueous solution composition to treat trees infected with brown root path bacteria and plant In order to prevent the killing of the roots of the trees and the planting of the brown root pathogen, so that the infected trees and plants can survive without dying, and can treat the trees and plants that are not infected with the brown root pathogen, so as to effectively prevent brown roots. The pathogen is parasitic on the roots of the trees and planted. A composition for controlling tree rooting and planting brown root disease according to claim 1, wherein the chlorine dioxide gas system is preferably produced by electrolytic sodium chloride aqueous solution. The invention relates to a method for controlling trees and planting brown root pathogens, which comprises treating the trees and plants planted with brown root pathogens by using the chlorine dioxide aqueous solution composition described in item 1 of the above patent application as an effective ingredient to prevent and kill The brown root pathogen that is parasitic on the roots of trees can effectively treat trees and plant. The invention relates to a method for protecting trees and planting plants, which comprises treating the trees and planting with the chlorine dioxide aqueous solution composition described in Item 1 of the above-mentioned patent application as an active ingredient, so as to prevent parasitic root bacteria from parasitic on the roots of the trees, and achieve effective Prevent the effects of tree-infected brown root bacteria.