476 results about "Musk melon" patented technology

The invention discloses a nutrient solution refined supply control method based on aeroponic muskmelon growth prediction, and relates to the related field of agricultural intellectualization, and the method comprises the steps: carrying out the data collection, and obtaining the growth environment data; carrying out growth analysis to obtain growth characteristic parameters, carrying out nutritional requirement calculation, and determining an atomized nutrient solution coefficient; constructing a growth prediction model, obtaining a growth prediction trend curve, carrying out supply analysis, and formulating a nutrient solution supply strategy; the growth of the muskmelon is monitored in real time, the atomized nutrient solution coefficient is dynamically adjusted according to a growth monitoring log, and a second atomized nutrient solution coefficient is generated; a nutrient solution supply strategy is updated and optimized, and self-adaptive refined supply control is carried out. The technical problem that fine control is insufficient due to the fact that existing mist culture melon nutrient solution supply control lacks real-time performance, accuracy and dynamic adjustment capacity is solved, and the technical effect of fine control is achieved through real-time, accurate and dynamic adjustment of the nutrient solution.

The embodiment of the invention discloses a KASP molecular marker, a primer pair and a kit for identifying the dwarf character of muskmelon and application of the KASP molecular marker, relates to the technical field of molecular markers, and aims to promote gene positioning and molecular-assisted breeding processes by utilizing molecular marker-assisted selective breeding on the dwarf character of muskmelon. The method for identifying the dwarf character of the muskmelon comprises the following steps: extracting genome DNA of a target muskmelon, taking the genome DNA of the target muskmelon as a template for PCR amplification, and performing fluorescence detection based on a primer of a KASP marker K1069930 to obtain a gene type of the target muskmelon, on the basis of the detected gene type, the character of the target muskmelon is judged; the KASP marker K1069930 is designed according to an SNP (Single Nucleotide Polymorphism) site at Chr07: 1069930, and the nucleotide sequence of the SNP site is shown as SEQ ID NO. 1. The invention also discloses a kit for detecting the KASP marker K1069930 and a kit for detecting the KASP marker K1069930. The identification method provided by the invention can be more efficiently applied to breeding work of dwarf muskmelon germplasm.

The invention relates to the technical field of organic fertilizers and planting of watermelons and muskmelons, and provides a special fertilizer for milk irrigated watermelons and muskmelons and a double-stubble planting method for sweetness enhancement of milk irrigated watermelons and muskmelons. The special fertilizer for the milk irrigated watermelons and muskmelons comprises black goat manure, sophora alopecuroide, sesame seed meal, bran, organic fresh milk, brown sugar and zymophyte. The black goat manure is pulverized into powder by a pulverizer, the sophora alopecuroide is pulverizedinto 1 cm to 2 cm, and the ratio of the black goat manure, the sophora alopecuroide, the sesame seed meal, the brans, the organic fresh milk, the brown sugar and the zymophyte is 2700-3200: 80: 50: 150: 5: 1. The double-stubble planting method for sweetness enhancement of the milk irrigated watermelons and muskmelons comprises the following steps: selection of a nursery seedling plate and soil, cleaning and germination accelerating of seeds, soil preparation, transplanting, irrigation, topdressing, shaping and forking of watermelon and muskmelon vines and fruit bearing of the watermelons and the muskmelons. The problems that in an existing watermelon and muskmelon planting process, soil nutrients are damaged due to the fact that chemical fertilizers are used for a long time, and the sweetness of melons is reduced are solved.

The invention discloses a method for verifying CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) or Cas9 carrier activity and gene functions in muskmelon hairy roots, which comprises the following steps: by using cotyledons of muskmelon seeds germinating for two days as explants, infecting by using agrobacterium rhizogenes K599, co-culturing, inducing the hairy roots, and taking green fluorescent protein eGFP as a selection marker of transgenic hairy roots, so as to verify CRISPR or Cas9 carrier activity and gene functions in muskmelon hairy roots. And hairy roots for converting the CRISPR / Cas9 vector can be obtained in about one month. By utilizing the transformation material, availability of gene editing target sites of multiple genes is analyzed, it is found that increase of the copy number of sgRNA expression units has a promoting effect on gene editing efficiency, and it is found that after CmRHL1 is edited, muskmelon root hair cannot be formed. Therefore, the invention provides a convenient and fast way for verifying the activity of the CRISPR / Cas9 vector and researching the function of the gene in the root development process, and is a beneficial supplement for a stable genetic transformation method of the muskmelon.

The invention relates to the technical field of molecular markers, in particular to an Indel molecular marker related to yellow leaves of a melon seedling growing point and application of the Indel molecular marker. The invention explores a key candidate gene MELO3C016136 for controlling the leaf color of the growth point of the muskmelon seedling, and develops an Indel molecular marker ygp2 for identifying the leaf color change of the growth point of the muskmelon seedling based on the key candidate gene MELO3C016136. The molecular marker ygp2 can be used for identifying the leaf color change character of the growth point of the muskmelon seedling, only one-time PCR amplification and polyacrylamide gel electrophoresis need to be carried out on the DNA of the plant to be detected, the identification result is reliable, the genotype of the target plant can be simply and conveniently identified, and the genotype identification result is completely consistent with the leaf color phenotype of the growth point of the seedling; important technical support is provided for creating new muskmelon germplasm with yellow seedling growing point leaves.

The invention discloses application of a KASP molecular marker in identification of light yellow flower color traits of muskmelons, and belongs to the technical field of molecular markers. According to the KASP molecular marker for identifying the light yellow flower color character of the muskmelon, a genetic segregation population is constructed by taking a dark yellow flower color muskmelon and a light yellow flower color muskmelon as parents, and a stably inherited marker site chr04: 26634798G / A is obtained through molecular marker technology identification. The marker is closely related to the light yellow flower color character of the muskmelon, and has the characteristics of strong specificity and good stability. The molecular marker provided by the invention can realize rapid genotype detection of a muskmelon material through a high-throughput genotyping system, and the identification result is accurate and reliable and is not influenced by environmental factors. The molecular marker can be applied to molecular marker-assisted selective breeding of melon flower color characters, the breeding efficiency is remarkably improved, the breeding period is shortened, the breeding cost is reduced, and an effective molecular breeding tool is provided for directional improvement of melon flower colors.

The invention discloses a muskmelon fruit length molecular marker and application thereof. According to the method, two methods of BSA-seq and GPS-seq are utilized to perform preliminary positioning on the muskmelon fruit length related QTL, a reference genome Mel (DHL92) gene 3.6. 1 and a re-sequencing result are utilized to perform comparative analysis, two algorithms of SNP-index and InDel-index are comprehensively utilized to perform correlation analysis, the results of the two analysis methods are respectively counted, and the results of the two analysis methods are compared with those of the QTL. The larger segment is used as a candidate region associated with the length of the melon fruit, KASP06-3880 and KASP06-3606 are obtained, and the KASP06-3880 is located at the 34305438th basic group of the No.6 chromosome; the KASP06-3606 is located at the base at the 18936169th site of the chromosome 11; the two KASP markers KASP06-3880 and KASP11-3606 are subjected to genotype detection in extreme materials of F2 and RIL populations, and the two KASP markers determine the length of the muskmelon fruits, so that a new way is provided for breeding of the muskmelon fruits with different lengths.

The invention provides a salt-tolerant bacillus velezensis SD13 and application of the salt-tolerant bacillus velezensis SD13, the preservation number of the salt-tolerant bacillus velezensis SD13 is CCTCC NO: M2023570, and the gene sequence of the salt-tolerant bacillus velezensis SD13 is as shown in SEQ ID NO: 1. The strain is widely applied to agricultural biological prevention and control, can be used for preventing and controlling plant diseases, and particularly has a good effect on plant diseases in saline-alkali soil, including fusarium oxysporum of cowpeas, green cucumbers, peppers, muskmelons, bitter gourds and the like. In addition, the strain SD13 can be combined with an organic fertilizer to improve the salt tolerance of plants, and the strain SD13 has a prominent effect in the aspect of improving the salt tolerance of cowpeas. The strain has good salt tolerance, provides a new effective way for preventing and treating plant diseases and improving the salt tolerance of plants in agricultural production, is beneficial to reducing the use of chemical pesticides, reducing environmental pollution and promoting agricultural sustainable development, and has important economic and ecological values.

The invention belongs to the field of muskmelons, and particularly relates to a muskmelon seedling stage root system premature ability evaluation method. According to the melon seedling stage root system early emergence capability evaluation method, black soil is used as a medium to cultivate plant seedlings in batches, image analysis and data acquisition are facilitated, the measured main root length, lateral root total length and lateral root number variation range distribution is uniform and continuous, variation difference is remarkable, and the method is suitable for large-scale popularization and application. The difference of root growth conditions of different plant materials can be reflected. The evaluation method provided by the invention can be used for evaluating the early germination capability of different muskmelon materials, so that the experiment time is saved, the experiment repeatability is high, the stability is high, the data reproducibility, repeatability and stability are relatively good, the evaluation of the early germination capability of the root systems of a plurality of muskmelon materials can be completed at one time, and the evaluation method has a wide application prospect. The high-throughput evaluation of the early-growing capability of the melon root system is realized.

The invention belongs to the technical field of plant monitoring, and particularly relates to a nondestructive monitoring method and system for judging the healing state of a muskmelon grafted seedling by using a wearable sensor, and the method comprises the steps: preparing a pumpkin rootstock and a muskmelon scion for grafting; grafting when the first true leaf of the pumpkin rootstock is completely flattened and the first true leaf of the scion is half-expanded; a sensor is attached to the cotyledon of the scion to continuously detect the growth state of the grafted seedling; impedance signals of the sensor are measured through an instrument, and an impedance change curve 10 days after grafting is drawn to evaluate the grafting healing state. According to the method, the physiological activity state of the grafted seedling can be directly monitored, so that whether the healing state is good or not can be judged in advance.

The invention provides a genetic transformation method and application of muskmelon. The genetic transformation method comprises the following steps: carrying out co-culture treatment on an infected muskmelon explant and agrobacterium engineering bacteria in a sugar-free culture medium, and the sugar-free culture medium does not contain soluble sugar. By using the method, the co-culture time can be prolonged to 7-9 days, the infection efficiency of agrobacterium tumefaciens can be remarkably improved, the growth of the agrobacterium tumefaciens can be slowed down, agrobacterium tumefaciens pollution in the bud induction process is avoided, meanwhile, the immunoreaction of explants in the co-culture process is reduced, and the genetic transformation efficiency is further improved. Compared with an existing melon genetic transformation method in which co-culture time lasts for 4 days by adopting a sugar-containing culture medium, the genetic transformation method provided by the invention adopts a sugar-free culture medium and the co-culture time is prolonged to 8 days, so that the melon transgenosis efficiency can be improved by 14 times or more. The invention also provides an application of the genetic transformation method in preparation of a melon genetic transformation product.

The invention provides tomato straw carbon dots as well as a preparation method and application thereof, and belongs to the field of nano technologies and nano materials. The method comprises the following steps: crushing tomato straws, adding water according to a mass ratio of 1: (90-110), carrying out ultrasonic treatment, and heating at 130-200 DEG C for 6-10 hours; after centrifugation, filtration and dialysis, freeze drying is performed, and the tomato straw carbon dots are prepared. The tomato straw carbon dots are used as a root promoting agent or a plant growth auxiliary agent, the germination potential, the germination rate and the number of radicles and lateral roots of muskmelon seeds can be effectively increased, the root system of muskmelon seedlings is promoted to be more robust, and the plant growth vigor is more vigorous. In a saline-alkali soil environment, the tomato straw carbon dot aqueous solution can also be used for treating melon seeds to obtain a good effect, melon root systems can reach the growth level in non-saline-alkali soil, and the effect is remarkable.

The invention discloses an application of a muskmelon CmOFP8L gene in regulation and control of muskmelon fruit elongation. The invention finds that CmOFP8L is knocked out by using a gene editing technology, mutant fruits with lost gene functions are remarkably lengthened, overexpressed fruits are remarkably shortened, and the overall growth vigor and other characters of plants are not influenced, so that the CmOFP8L gene has an important regulation and control effect in the growth and development process of muskmelons. Therefore, the method has a good application prospect in melon fruit length improvement.

The invention relates to mortierella alpina and application thereof. The strain name is Mortierella alpina RS-01, the preservation number is CGMCC (China General Microbiological Culture Collection Center) No.41944, the preservation time is May 21, 2025, and the preservation location is CGMCC (China General Microbiological Culture Collection Center), No. 3, No.1 yard, West Beichen Road, Chaoyang District, Beijing, China. The mortierella alpina provided by the invention can be used for pathogenic bacteria of ginseng rust rot, pathogenic bacteria of muskmelon fusarium wilt, pathogenic bacteria of pythium aphanidermatum, pathogenic bacteria of apple fruit rot, pathogenic bacteria of northern corn leaf blight, pathogenic bacteria of seedling blight, pathogenic bacteria of walnut canker, pathogenic bacteria of poplar canker, pathogenic bacteria of pepper anthracnose and pathogenic bacteria of blueberry stem canker; the compound has the best antibacterial effect on pathogenic bacteria of apple shell monochromatic alternaria, pathogenic bacteria of tobacco brown spot, and especially pathogenic bacteria of ginseng rust rot.

The invention relates to the technical field of plant cultivation, and particularly discloses a muskmelon soilless cultivation method based on a plant factory, which comprises the following steps: S1, seedling raising: placing muskmelon seeds after germination acceleration in a seedling raising tray, and carrying out first light treatment to start seedling raising under the light quality conditions of 10-15% of far-red light, 25-30% of red light, 25-30% of blue light and 25-30% of white light; s2, field planting and separate planting: performing secondary illumination treatment on the melon seedlings, and starting to cultivate the melon seedlings until the melon seedlings grow to a flowering pollination period; the light quality conditions of the second illumination treatment are as follows: the far-red light is 18-22%, the red light is 18-22%, the blue light is 18-22% and the white light is 34-46%; s3, blooming, pollinating and harvesting: when a first flower is bloomed, the time required for alternation of daytime temperature and night temperature is 0.25-1 h, and cultivation is continued until the muskmelon is harvested. The method can shorten the growth cycle of muskmelons and increase the sugar content of fruits.

The invention discloses application of a KASP molecular marker in identification of sweet melon peel color traits, and belongs to the technical field of molecular markers. The invention aims to promote gene localization and molecular-assisted breeding processes by utilizing molecular marker-assisted selective breeding on sweet melon pericarp color characters. The KASP molecular marker is a KASP marker RW2; the KASP marker RW2 is designed according to an SNP (Single Nucleotide Polymorphism) site at the position of Chr04: 526653. According to the application, the KASP molecular marker RW2 is used for performing genetic typing on the red-peel muskmelon and the white-peel muskmelon, the DNA of a target plant can be identified only through one-time PCR amplification, the whole detection process is simple and convenient, and complex steps such as enzyme digestion, electrophoresis and sequencing are not needed. Through the high-throughput genotyping system, a genotyping graph and a genotyping value can be rapidly obtained, so that rapid identification of the genotype of a target plant is realized. The KASP molecular marker RW2 provided by the invention can be more efficiently applied to the breeding work of sweet melon peel color germplasm.

The invention relates to the technical field of grafting cultivation, and particularly discloses application and a method of a CmGH9B3 gene in promoting grafting healing of muskmelons, the nucleotide sequence of the CmGH9B3 gene is shown as SEQ ID NO.6, and the amino acid sequence coded by the CmGH9B3 gene is shown as SEQ ID NO.7; by regulating and controlling the overexpression of the CmGH9B3 gene in the muskmelon scion, the healing of the graft union after the muskmelon is grafted with the pumpkin is promoted. Through overexpression of the CmGH9B3 gene in the muskmelon scion, the physical adhesion capacity of the muskmelon scion and the grafted seedling of the pumpkin rootstock is improved, the conduit absorption capacity of the grafted seedling is improved, and healing of a graft union after the muskmelon is grafted with the pumpkin is promoted.

The invention discloses a KASP molecular marker, a primer pair, a kit and a method for identifying sweet melon pericarp color traits and application, and belongs to the technical field of molecular marker-assisted breeding. The invention provides a KASP molecular marker (SEQ ID NO.1-2), a primer pair (SEQ ID NO.3-5) and a kit containing the primer pair for determining the pericarp color character of the sweet melon in order to identify the pericarp color character more quickly and more accurately in the seedling stage of the melon and realize screening of germplasm resources and molecular-assisted selection breeding of the germplasm resources, and provides the KASP molecular marker (SEQ ID NO.1-2) for determining the pericarp color character of the sweet melon, the primer pair (SEQ ID NO.3-5) and the kit containing the primer pair. According to the identification method provided by the invention, the to-be-detected muskmelon genome DNA is extracted in the seedling stage, so that molecular marker-assisted selection can be performed on the sweet melon peel color character, the operation is simple and convenient, the breeding accuracy and efficiency are improved, the variety breeding period is shortened, and the variety breeding process is accelerated.

The invention relates to a composite natural plant essential oil chitosan nano microcapsule and a preparation method and application thereof, the nano microcapsule is used for preventing and treating muskmelon fusarium wilt, the composite natural plant essential oil is used as a core material, and chitosan is used as a wall material; the composite natural plant essential oil comprises myrrh essential oil, chamomile essential oil and fructus cnidii essential oil. The essential oil in a liquid state is embedded into the chitosan wall material by utilizing a nano microcapsule technology to form a solid state, so that the stability is high, and the essential oil is easy to store and transport. According to the present invention, the preparation process is adjusted, such that the obtained nanometer microcapsule can wrap more plant essential oil so as to obtain the optimal embedding rate; meanwhile, when the obtained nano microcapsule is applied to prevention and treatment of muskmelon fusarium wilt, the bacteriostasis rate can reach 85% or above. The raw materials for preparing the nano microcapsule are green and can be completely decomposed, pollution and chemical residues can be reduced, and the nano microcapsule has a huge application prospect in the aspect of crop disease control.

The invention discloses a muskmelon CmACS11 gene promoter structure variation SV352 and application thereof in regulation and control of female development of muskmelons, and relates to the technical field of biology. It is found for the first time that insertion of 352bp exists on the CmACS11 promoter, the CmACS11 promoter is named as SV352, the nucleotide sequence of the CmACS11 promoter is shown as SEQ ID No: 3, and the CmACS11 promoter is closely linked with female complete development characters of muskmelons and has dominant inheritance. Furthermore, through in-situ hybridization and transgenosis verification, the SV352 causes the loss of selective expression characteristics of the CmACS11, so that the CmACS11 is expressed in all flower buds, and the expression is advanced, which is a key variation for controlling complete development of female organs of muskmelons. The SV352 variation provides a new variation resource for creating a muskmelon female line breeding material.

The utility model relates to a muskmelon planting seedling raising frame which comprises two bases, two supports located on the bases respectively, a plurality of water storage tanks transversely arranged between the two supports and storage racks located in the water storage tanks, the bottoms of the storage racks are communicated with the interiors of the water storage tanks, and water inlets are formed in the upper portions of the two ends of each water storage tank. The outer end of the water inlet, namely the other end opposite to the water storage tank, is provided with a water injection tank, positioning devices are arranged at the two ends of the storage rack, each positioning device comprises a bent plate, a positioning plate, a threaded column, a clamping piece and a rotating piece, and the support is provided with a groove used in cooperation with the positioning devices. According to the seedling raising frame for muskmelon planting, the watering amount of muskmelon seedlings can be controlled, the watering amount can be adjusted at any time according to the change of the growing period of the seedlings, and the situation that the watering amount is difficult to control in manual irrigation is avoided.

The invention discloses a molecular marker Site1888 closely linked with a melon leaf color yellowing character and application thereof, and belongs to the field of plant molecular genetic breeding research. The molecular marker is used for detecting leaf yellowing characters in a plurality of natural muskmelon populations, DNA (deoxyribonucleic acid) of a material to be selected is used as a template, a primer pair of the molecular marker Site1888 is used for PCR (polymerase chain reaction) amplification, an amplification product is subjected to polyacrylamide gel electrophoresis, field character analysis is combined, and the identification accuracy rate of the molecular marker in the seedling stage is 100%. The molecular marker has very important value in muskmelon production practice and breeding. The operation method is simple, convenient, high in stability, rapid and accurate, and a novel auxiliary selection method is provided for molecular breeding of muskmelons.

The invention relates to the technical field of grafting devices, and discloses a grafting device for muskmelon seedling raising and a grafting method thereof.The grafting device comprises a cutting assembly, an L-shaped guide rail, a stock clamping assembly, a scion clamping assembly and a grafting fixing assembly; the long edge of the L-shaped guide rail is transversely arranged, the short edge is located at the upper end of the long edge, the L-shaped guide rail comprises a horizontal sliding block and a vertical sliding block, the horizontal sliding block is slidably connected to the long edge, the vertical sliding block is slidably connected to the short edge, and a grafting fixing assembly is fixed to the corner of the L-shaped guide rail. The stock clamping assemblies are fixed to the horizontal sliding block, the scion clamping assemblies are fixed to the vertical sliding block, and the cutting assembly is fixed to the middle section of the long edge of the L-shaped guide rail. According to the grafting device for muskmelon seedling raising and the grafting method thereof, the muskmelon grafting efficiency can be improved.

The invention relates to an attractant for efficient pollination of muskmelons and a preparation method thereof, and belongs to the technical field of crop bee pollination, the attractant comprises the following raw materials: 15-20 parts of a modified microcapsule compound, 10-15 parts of a saccharide active component, 4-6 parts of a solubilizer, 3-5 parts of an emulsifier and 60-70 parts of water; according to the technical scheme, hydroxypropyl-beta-cyclodextrin and Schiff alkalized mesoporous silica are combined to obtain the composite material; the composite material is firstly mixed with an essential oil compound and then mixed with a color active component, and a functional material is obtained; the preparation method comprises the following steps: coating a functional material with Arabic gum and polycaprolactone to obtain a modified microcapsule compound; and mixing the modified microcapsule compound, a solubilizer, an emulsifier, a saccharide active component and water to finally prepare the attractant for efficient pollination of the muskmelon. The slow release performance, the attraction performance and the stability of the attractant are integrally improved, the shelf life of the attractant is prolonged, the pollination efficiency of muskmelon flowers is improved, and the comprehensive performance is good.

The invention belongs to the technical field of thick-skin muskmelon cultivation, and particularly relates to a thick-skin muskmelon cultivation method under a simple rain sheltering facility. A simple rain sheltering facility comprises a plurality of greenhouse bodies arranged at intervals, each greenhouse body comprises a supporting stand column vertically fixed to the ground, arch-shaped rods are fixed to the tops of the supporting stand columns, and horizontal cross beams are fixed to the two ends of each arch-shaped rod; the thin film is laid on the tops of the arched rods of the greenhouse main body; and the vine hanging rope and the horizontal cross beams are located on the same horizontal plane, and the vine hanging rope is vertically fixed among the horizontal cross beams of the plurality of greenhouse main bodies. The transparent film is only laid on the top, no structure is arranged on the periphery, and the whole greenhouse body can be ventilated; secondly, compared with an existing common steel pipe greenhouse, the cost is greatly reduced; moreover, the thick-skin muskmelons are in a semi-open-air environment and can attract surrounding insects for pollination, the production link of artificial pollination is omitted, the labor cost is effectively reduced, meanwhile, the yield and quality of the thick-skin muskmelons are improved, and the method has extremely high popularization value.

The invention discloses a molecular marker Site1773 closely linked with a melon leaf color yellowing character and application of the molecular marker Site1773, and belongs to the field of plant molecular genetic breeding research. The molecular marker is used for detecting leaf yellowing characters in a plurality of natural muskmelon populations, DNA (deoxyribonucleic acid) of a material to be selected is used as a template, a primer pair of the molecular marker Site1773 is used for PCR (polymerase chain reaction) amplification, an amplification product is subjected to polyacrylamide gel electrophoresis, field character analysis is combined, and the identification accuracy rate of the molecular marker in the seedling stage is 100%. The molecular marker has very important value in muskmelon production practice and breeding. The operation method is simple, convenient, high in stability, rapid and accurate, and a novel auxiliary selection method is provided for molecular breeding of muskmelons.

The invention provides application of a CmTCP1 gene in creation of a muskmelon without tendrils, and belongs to the technical field of plant gene editing and plant character improvement. According to the invention, the CmTCP1 gene of the muskmelon is edited mainly by using a CRISPR / Cas9 gene editing technology, so that the function of promoting the formation of tendrils by the protein generated by the expression of the CmTCP1 gene is destroyed or weakened, the development of the tendrils of the muskmelon is inhibited, the tendril character of the muskmelon is changed, the germplasm of the muskmelon without tendrils is created, the new improved muskmelon variety without tendrils is cultivated, the plant type management in the cultivation process of the muskmelon can be simplified, and the yield of the muskmelon is increased. Manpower and material resource consumption is reduced, and melon planting benefits are improved.

The invention discloses application of carnosic acid nano-emulsion as an agricultural bactericide for preventing and treating plant diseases. The plant diseases comprise rhizoctonia solani, colletotrichum rubrum, botrytis cinerea, peronophythora litchii, phytophthora capsici, colletotrichum gloeosporioides, tomato ralstonia solanacearum, citrus canker germs, potato soft rot germs, xanthomonas oryzae pv. Oryzae, mango bacterial angular leaf spot germs and muskmelon bacterial fruit spot germs; the carnosic acid nano-emulsion is prepared from the following raw materials in percentage by mass: 0.5 to 5 percent of carnosic acid, 5 to 20 percent of organic solvent, 4.0 to 10 percent of emulsifier and the balance of water. The carnosic acid nano-emulsion prepared by the invention has the characteristics of simplicity in processing, emulsion stability, good wettability, obvious bactericidal activity and the like, and meanwhile, the carnosic acid is a plant secondary metabolite and is high in use safety in the process of preventing and treating plant diseases.

The invention discloses a derivative containing chiral thioether and sulfone units as well as a preparation method and application of the derivative. The derivative containing the chiral thioether and the sulfone unit is applied to preparation of medicaments for preventing and treating rice bacterial leaf blight, rice bacterial leaf streak, citrus canker, tobacco bacterial wilt, muskmelon bacterial leaf blight, tomato bacterial wilt, watermelon fruit rot, Chinese cabbage soft rot, peach tree shot hole disease and cabbage black rot fungus. The invention further discloses application of the derivative containing the chiral thioether and sulfone unit to preparation of medicaments for preventing and treating rice bacterial leaf blight, rice bacterial leaf streak, citrus canker, tobacco bacterial wilt, muskmelon bacterial leaf blight, tomato bacterial wilt, watermelon fruit rot and cabbage black rot. The derivative containing chiral thioether and sulfone units has the characteristics of broad bactericidal spectrum and high activity, has excellent prevention and treatment effects on bacterial diseases, and is simple and feasible in preparation steps and low in production cost.