Treatment method for German iris soft rot plants

Abstract

The invention belongs to the field of flower cultivation management, and discloses a treatment method for German iris soft rot plants. German iris is a flower with extremely high ornamental value, but is easily infected with soft rot, so that the popularization and application of the German iris are seriously influenced. According to the method, the survival rate of the infected plants can reach about 95% through the steps of infected plant cutting, cutting part disinfection, sealing, tuber field planting after treatment and the like. The method is simple, convenient, cheap and efficient, and plays an important role in promoting the development of the German iris industry.

Description

Technical Field

[0001] The present invention belongs to the field of flower cultivation management, and more specifically relates to a treatment method for German iris plants infected with soft rot disease. Background Art

[0002] German iris is one of the most ornamental horticultural groups in the genus Iris of the family Iridaceae. Because of its peculiar flower shape, rich flower colors, and slender and straight leaves, it is currently widely used in foreign countries in forms such as garden planting, ground cover greening, and potted flower viewing. In recent years, some large-flowered varieties with wrinkled petal edges have been sought after by domestic and foreign flower lovers, and its industrial development momentum is strong. However, German iris is prone to infection by soft rot disease. For some varieties with poor disease resistance, the mortality rate can reach more than 80% after infection, and these susceptible varieties are often those with excellent ornamental traits. Therefore, in order for German iris to occupy a place in home gardening, in addition to breeding excellent varieties with both ornamental and disease resistance, how to treat German iris plants already infected with soft rot disease so that they can continue to grow healthily has also become an urgent problem to be solved in the development process of the relevant industry. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a treatment method for German iris plants infected with soft rot disease. Through steps such as cutting the diseased plants, disinfecting and sealing the cutting parts, and planting the tubers after treatment, the survival rate of the diseased plants can reach about 95%.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions: A treatment method for German iris plants infected with soft rot disease, comprising the following steps: (1) Cutting of diseased plants: First, cut off the leaves of the diseased German iris plants at the tuber part and remove the roots, leaving only the tubers. Then, use a disinfected sharp blade to completely cut off the rotten tuber part until the internal healthy and firm tissue is exposed; (2) Disinfection and sealing of the cutting part: Burn the cutting part on the flame for disinfection, and apply a sealing agent to the burned wound for sealing; (3) Planting of the tubers after treatment: Plant the treated German iris tubers shallowly in a rain-sheltered and ventilated place. During this period, the cultivation substrate should be kept at a certain humidity until the tubers grow new buds.

[0005] Further, the flame burning disinfection time in step (2) is 3 - 5 s. If the burning time is too long, it is easy to cause high-temperature damage to the disinfected tissue.

[0006] Further, the sealing agent in step (2) refers to a plant wound healing agent / paste containing fungicides and substances such as promoting wound healing.

[0007] Further, in step (3), shallow planting means that the substrate covers 1 / 4 - 1 / 3 of the depth of the tuber, and the treated part is kept exposed to the air to facilitate the drying and healing of the wound.

[0008] Further, the humidity of the substrate in step (3) refers to a relative water content of 40% - 50%. Excessive substrate humidity is likely to cause the tuber to be reinfected.

[0009] Compared with the prior art, the present invention has the following beneficial effects: For the Iris germanica plants infected with soft rot disease treated by the steps of the present invention, the subsequent survival rate can reach about 95%. Compared with the survival rate of less than 25% without any treatment, the economic losses caused by plant infection are greatly reduced. In addition, the technical operation of the present invention is simple and has strong practicability. This technology plays an important role in promoting the development of Iris germanica in the field of home gardening.

[0010] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0011] Here, the special term "embodiment" does not necessarily mean better or superior to other embodiments when any embodiment is described as "exemplary". For the performance index tests in the embodiments of this application, unless otherwise specified, conventional test methods in the art are adopted. It should be understood that the terms described in this application are only for describing specific embodiments and are not used to limit the content disclosed in this application.

[0012] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs; other test methods and technical means not specifically noted in this application refer to the experimental methods and technical means commonly used by those of ordinary skill in the art.

[0013] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "middle", "upper", "lower", "rise", "fall", "vertical", "surface", "top", "bottom", "inside", "outside", etc. are the orientation or positional relationships shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0014] To better illustrate the content of this application, numerous specific details are provided in the following specific embodiments. Those skilled in the art should understand that this application can still be implemented without certain specific details. In the embodiments, some methods, means, instruments, equipment, etc. that are well-known to those skilled in the art are not described in detail to highlight the gist of this application.

[0015] On the premise of no conflict, the technical features disclosed in the embodiments of this application can be combined arbitrarily, and the obtained technical solutions belong to the content disclosed in the embodiments of this application.

[0016] It should be noted that the Iris germanica in the following embodiments is taken from the Iris germplasm resource nursery of the Institute of Botany, Jiangsu Province, Chinese Academy of Sciences, and tools such as sealants and cultivation substrates are all purchased from conventional products available on the market.

[0017] Example 1: (1) Cutting of diseased plants: On June 25, 2023, during the plum rain season in Nanjing, it was found through investigation in the Iris germplasm resource nursery of the Institute of Botany, Jiangsu Province, Chinese Academy of Sciences that some Iris germanica varieties were severely infected with soft rot. The tubers of the severely diseased 'KITTYKAY' variety were dug out, washed clean of soil with running water, and then brought back indoors. The surface moisture of the plants was wiped clean indoors, and then the leaves of the diseased plants were cut off at the tuber part and the roots were removed, leaving only the tubers. Then, the rotten tuber part was completely cut off with a sterilized sharp blade until the healthy and firm tissue inside was exposed; (2) Disinfection and sealing of the cutting part: The cutting part was sterilized by burning on the flame for 4 s, and the wound after burning was smeared with Guoguang brand tree wound healing agent for sealing; (3) Planting of the treated tubers: After high-temperature sterilization, peat was mixed with vermiculite and perlite in a volume ratio of 2:1:1, and an appropriate amount of water was added to make the relative water content of the substrate reach about 45%. Then, the treated Iris germanica tubers were buried in the mixed substrate, covering the rhizome at a depth of 1 / 4 - 1 / 3, and the treated part was exposed to the air. Then, the planted tubers were placed in a well-ventilated place indoors until new buds grew from the tubers.

[0018] Finally, it was statistically counted that in this example, 20 diseased plants were treated, and 19 tubers grew healthy new buds after treatment, with a plant survival rate of 95%.

[0019] Example 2: It is basically similar to the steps of Example 1, except that: in step (1), the diseased variety taken is 'PUDDYTAT'.

[0020] Finally, it was statistically counted that in this example, 35 diseased plants were treated, and 33 tubers grew healthy new buds after treatment, with a plant survival rate of 94.3%.

[0021] Comparative Example 1: It is basically similar to the steps of Example 1, except that: in step (2), the time for burning the cut part of the Iris germanica tuber on the flame is 8 s.

[0022] After final statistics, 20 diseased plants were treated in this example. Because the burning time was too long, the treated parts of some tubers were charred, resulting in 14 tubers that grew healthy new shoots later, and the plant survival rate was 70%.

[0023] Comparative Example 2: It is basically similar to the steps of Example 2, except that: in step (2), the cut and burned wound is not smeared with tree wound healer.

[0024] After final statistics, 25 diseased plants were treated in this example. Because the wound healer was not smeared, some tubers were reinfected with soft rot at the wound site again, resulting in 17 tubers that grew healthy new shoots later, and the plant survival rate was 68%.

[0025] Comparative Example 3: It is basically similar to the steps of Example 2, except that: in step (3), all the treated tubers are buried in the mixed substrate.

[0026] After final statistics, 18 diseased plants were treated in this example. Among them, 2 were reinfected with soft rot at the wound site, and another 1 was infected with soft rot at the original healthy site, resulting in 15 tubers that finally grew healthy new shoots, and the plant survival rate was 83.3%.

[0027] Comparative Example 4: It is basically similar to the steps of Example 1, except that: in step (3), the relative water content of the substrate is about 70%.

[0028] After final statistics, 22 diseased plants were treated in this example. Among them, 5 were reinfected with soft rot at the wound site, and another 2 were infected with soft rot at the original healthy site, resulting in 15 tubers that finally grew healthy new shoots, and the plant survival rate was 68.2%.

[0029] Comparative Example 5: When it was observed on June 25, 2023 in the Iris germplasm resource nursery of the Institute of Botany, Chinese Academy of Sciences, Jiangsu Province that the 'KITTYKAY' variety was severely infected with soft rot, no treatment was done, and 20 plants were marked. When observing the marked positions again on March 10, 2024, it was found that only 5 plants grew healthy new shoots again, and the plant survival rate was 25%.

[0030] Comparative Example 6: On June 25, 2023, when it was observed that the 'PUDDYTAT' variety was severely infected with soft rot in the Iris germplasm resource nursery of the Institute of Botany, Chinese Academy of Sciences, Jiangsu Province, 25 plants were marked without any treatment. When observing the marked positions again on March 10, 2024, it was found that only 4 plants grew healthy new shoots again, and the plant survival rate was 16%.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A treatment method for Iris germanica plants with soft rot, characterized in that, The method comprises the following steps: (1) Cutting of diseased plants: First, cut off the leaves of the diseased Iris germanica plants at the tuber part and remove the roots, leaving only the tubers. Then, use a sterilized sharp blade to completely cut off the rotten tuber part until the internal healthy and firm tissue is exposed; (2) Disinfection and sealing of the cutting part: Burn the cutting part on the flame for disinfection, and apply a sealant to the burned wound for sealing; (3) Planting of the treated tubers: Plant the treated Iris germanica tubers shallowly in a rain-sheltered and ventilated place. During this period, the cultivation substrate should be kept at a certain humidity until new buds grow from the tubers.

2. The treatment method for a plant with soft rot of Iris germanica according to claim 1, characterized in that, In step (2), the time for flame burning disinfection is 3 - 5 s.

3. A treatment method for plants with soft rot of Iris germanica according to claim 1 or 2, characterized in that, The sealant in step (2) refers to a plant wound healing agent / paste containing fungicides and substances such as those promoting wound healing.

4. A treatment method for plants with soft rot of Iris germanica according to claim 1, characterized in that, In step (3), shallow planting means that the substrate covers the tubers at a depth of 1 / 4 - 1 / 3, and the treated part is kept exposed to the air.

5. A treatment method for plants with soft rot of Iris germanica according to claim 1 or 4, characterized in that, The humidity of the substrate in step (3) refers to a relative water content of 40% - 50%.