CN102365948A - Chitosan oligosaccharide composition for resisting rice blast, application and method thereof - Google Patents
Chitosan oligosaccharide composition for resisting rice blast, application and method thereof Download PDFInfo
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- CN102365948A CN102365948A CN2011103330705A CN201110333070A CN102365948A CN 102365948 A CN102365948 A CN 102365948A CN 2011103330705 A CN2011103330705 A CN 2011103330705A CN 201110333070 A CN201110333070 A CN 201110333070A CN 102365948 A CN102365948 A CN 102365948A
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Abstract
The invention relates to a Chitosan oligosaccharide composition for resisting rice blast, an application and a method thereof, and specifically relates to a pesticide composition for resisting rice blast. The pesticide composition contains Chitosan oligosaccharide which accounts for 0.005-0.02 wt% of the pesticide composition. The invention also provides the application of the Chitosan oligosaccharide-containing pesticide composition in controlling rice blast. The pesticide composition is characterized in that the weight percentage of Chitosan oligosaccharide in the pesticide composition is 0.005-0.02%. The composition provided by the invention is used to solve the important problem of resisting rice blast. In particular, after treating seeds and plant of paddy rice by using the Chitosan oligosaccharide-containing pesticide composition, the pesticide composition can resist rice blast and will cause no pesticide damage to crops without pesticide residues.
Description
Technical field
The invention belongs to agrochemical field, particularly relate to the control composition of rice blast and prevent and treat method, relate to a kind of chitosan oligosaccharide composition and use thereof and method that is used for anti-rice blast particularly.
Background technology
Paddy rice can both infect rice blast from the seedling to the maturing stage.Different period of being injured because of paddy rice with the position, be divided into seedling pest, leaf pest, joint pest, fringe pest and grain pest.The seedling pest betided rice shoot 3 leaves before the phase, and it is withered that sick seedling is yellowish-brown to taupe.Leaf seasonal febrile diseases spot has types such as chronic, acute.The chronic type scab is confused fusiformis, and central authorities are greyish white, and the edge is reddish brown, and is peripheral yellow, and the scab two ends have along the brown " downright bad line " of vein expansion, and the spot back of the body has the celadon bacterium mould.Acute scab ovalize, dirty-green, water stain shape, the spot back of the body has dense celadon bacterium mould.The tip of a leaf, auricle or the pulvinus position that is injured is crineous to grey black.The pulvinus scab is irregular, often causes blade broken.Joint seasonal febrile diseases spot spreads along the stipes ring-type, the blackening of sick joint, and the drying shrinkage depression, stem is crooked even fracture, and fringe pest or branch stalk pest are light brown or grey black, rot to fracture, and grain does not enrich even dead ears.Grain seasonal febrile diseases spot is taupe, and mostly middle canescence is blighted grain or half real grain.The occurrence regularity of rice blast: germ mainly survives the winter in sick stalk and sick paddy, becomes the primary source of infection of next year early rice.When 20 ℃～30 ℃ of temperature and relative moisture 90% are above, favourable to falling ill.Overgrow tillering stage, and love blue or green booting stage, and heading stage, early rice was met 3 days～4 days wet weather, and late rice meets 5 days～cooling in 7 days and the big weather of dew heavy fog, brings out leaf pest or fringe pest easily.
Tricyclazole, kitazine, kasugarnycin or the spraying of U.S. degree lime sulfur are mainly used in chemical control, and control fringe pest were respectively sprayed once in paddy rice cut phase and full heading time.
Liu Xiaoyu etc. have studied water-soluble chitosan oligosaccharide has the obvious suppression effect to various plants growth of pathogenic bacteria such as cotton anthracnose bacterium, rice blast, and inhibiting size is variant because of the difference of chitosan oligosaccharide molecular weight, concentration, phytopathogen.But what only be directed against under study for action is bacterium, crop gained disease is not experimentized, and does not work as warm disease so the concentration of the chitosan oligosaccharide that uses is not adapted at big Tanaka's control.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of composition pesticide that is used for anti-rice blast, comprise chitosan oligosaccharide in this composition pesticide, the percentage by weight that chitosan oligosaccharide accounts for this composition pesticide is 0.005%-0.02%.Preferably, to account for the percentage by weight of this composition pesticide be 0.01%-0.02% or 0.005%-0.009% to chitosan oligosaccharide.
Above-mentioned this composition pesticide can prepare liquid preparation or solid pharmaceutical preparation.Liquid preparation can be any liquid preparation of agriculture usefulness, and solid pharmaceutical preparation also is any solid pharmaceutical preparation of agriculture usefulness.Preferably, liquid preparation is an aqua, microemulsion, water dispersible granules or suspending agent; Solid pharmaceutical preparation is preferably wetting powder or granule.
The present invention also provides the above-mentioned composition pesticide that comprises chitosan oligosaccharide to be used to prevent and treat the purposes of rice blast; The percentage by weight that it is characterized in that comprising chitosan oligosaccharide in the composition pesticide of chitosan oligosaccharide is 0.005%-0.02%; Preferably; The percentage by weight that chitosan oligosaccharide accounts for composition is 0.005%-0.009%, and is perhaps preferred, and the percentage by weight that chitosan oligosaccharide accounts for composition is 0.01%-0.02%.
The present invention also provides the method for using the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that each stage set of applications compound that paddy rice grows is handled paddy rice, comprise rice paddy seed is handled, perhaps use composition at rice seedling; Perhaps use composition at rice anthesis; Perhaps after paddy rice blooms, use composition, perhaps to rice paddy seed, seedling stage, bloom preceding, use composition successively after blooming, the percentage by weight of chitosan oligosaccharide is 0.005%-0.02% in the wherein said composition; Preferably; The percentage by weight that chitosan oligosaccharide accounts for composition is 0.005%-0.009%, and is perhaps preferred, and the percentage by weight that chitosan oligosaccharide accounts for composition is 0.01%-0.02%.
In the said method, said composition can prepare liquid preparation or solid pharmaceutical preparation.Liquid preparation can be any liquid preparation of agriculture usefulness, and solid pharmaceutical preparation also is any solid pharmaceutical preparation of agriculture usefulness.Preferably, liquid preparation is an aqua, microemulsion, water dispersible granules or suspending agent; Solid pharmaceutical preparation is preferably wetting powder or granule.
The present invention also provides the method for using the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that rice paddy seed is handled; To account for the percentage of composition weight be 0.01%-0.03% to chitosan oligosaccharide in the wherein said composition; Preferably, to account for the percentage of composition weight be 0.01%-0.02% to chitosan oligosaccharide.The method of wherein rice paddy seed being handled can be the conventional method for treating seeds in this area, includes but not limited to seed dressing, dipping, seed soaking or vexed kind.Wherein seed dressing is meant medicinal powder or soup and seed is mixed; Dipping be medicine liquid spray on seed, and constantly stir and make seed all wetting, cover coverings such as mat, pile the sowing of vexed back; Seed soaking is meant that a seed or seedling are immersed in the certain density soup, makes seed or seedling absorb medicament through certain hour; Vexed kind is meant mixes the method that the back vexed certain hour of heap is sowed again with soup and seed.
The present invention also provides the method for using the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that seedling stage paddy rice is to the rice application composition; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
The present invention also provides the method for using the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that before the blooming of paddy rice the rice application composition; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
The present invention also provides the method for using the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that blooming the back to the rice application composition in paddy rice; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
The present invention also provides the method for using the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that with said composition rice paddy seed being handled, to account for the percentage of composition weight be 0.01%-0.02% to chitosan oligosaccharide in the wherein said composition, then seedling stage of paddy rice to the rice application composition; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide; Then at the preceding applying said compositions of blooming of paddy rice; Use the back first and used 1 time in every interval 15-20 days again, application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first; The percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide; Applying said compositions after paddy rice blooms is used the back first and was used 1 time in every interval 15-20 days again then, and application times is 0-2 time once more; The concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
In the said method, the method for wherein rice paddy seed being handled can be the conventional method for treating seeds in this area, includes but not limited to seed dressing, dipping, seed soaking or vexed kind.Wherein seed dressing is meant medicinal powder or soup and seed is mixed; Dipping be medicine liquid spray on seed, and constantly stir and make seed all wetting, cover coverings such as mat, pile the sowing of vexed back; Seed soaking is meant that a seed or seedling are immersed in the certain density soup, makes seed or seedling absorb medicament through certain hour; Vexed kind is meant mixes the method that the back vexed certain hour of heap is sowed again with soup and seed.
In the said method, any method effectively commonly used when the method for using is meant the applications of pesticide includes but not limited to powder injection process, spray-on process, fumigating system, soil treatment method or smog method etc.
Wherein powder injection process is meant that the wind-force that utilizes duster to produce is sprinkling upon the agricultural chemicals of pulvis the surface of crop or controlling object equably; Spray-on process is meant with a certain amount of agricultural chemicals and an amount of water and is made into soup, with the spraying apparatus medicine liquid spray is become droplet, is evenly distributed in crop or controlling object surface; Fumigating system is meant and adopts fumigant or volatile medicament, makes its volatilization become the effectively gas of prevention and elimination of disease and pests; The soil treatment method is meant and takes to spray, dusts, spreads methods such as pesticide-clay mixture, imposes on agricultural chemicals equably in ground or the certain soil layer; The smog method is meant utilizes special-purpose facility to be dispersed into smoke condition to the oily agricultural chemicals, to reach the method for Pesticidal and sterilizing weeding.
In the said method, with composition seed is handled, be meant composition is mixed with seed, composition is under the situation of liquid, and seed is soaked in the liquid, when composition is solid pharmaceutical preparation, seed is mixed with solid pharmaceutical preparation.
Among the present invention, chitosan oligosaccharide is that Glucosamine passes through 1, and the degree of polymerization that the 4-glycosidic bond is formed by connecting is the mixture of the high molecular polymer of 2-30, and mean molecule quantity is 1000-3000 dalton.Chitosan oligosaccharide can be through any means preparation, and for example following method: deacetylation is the mixture of the chitosan oligomer of 2-30 at the shitosan more than 70% through the degree of polymerization that methods such as mechanical degradation method, chemical degradation method, enzyme edman degradation Edman, glycosyl transfer method, composite degradation method prepare.Perhaps, be the mixture of the chitosan oligomer of 2-30 through from fungal cell wall or insect body wall, extracting the degree of polymerization that obtains chitin and prepare through methods such as mechanical degradation method, chemical degradation method, enzyme edman degradation Edman, glycosyl transfer method, composite degradation methods.Perhaps, through passing through 1 by Glucosamine, the degree of polymerization that the chemosynthesis of 4-glycosidic bond is polymerized is the mixture of polymers of 2-30.Chitosan oligosaccharide is the mixture of the high molecular polymer of various polymerization thing at present, that is to say in the chitosan oligosaccharide to be not the oligosaccharides form of the single degree of polymerization, but the chitosan oligosaccharide monose of every kind of degree of polymerization possibly exist all.So no matter prepare through which kind of method; The commercially available prod that perhaps prepares through above-mentioned preparation method, as long as it is that Glucosamine passes through 1, the degree of polymerization that the 4-glycosidic bond is formed by connecting is that 2-30, mean molecule quantity are that the mixture of the daltonian high molecular polymer of 1000-3000 is exactly a chitosan oligosaccharide of the present invention; It can contain acetyl group; But the sugar unit of bonding acetyl group is no more than 40% amount, preferably is no more than 30% amount, especially preferably is no more than 20% amount.Commercially available chitosan oligosaccharide all is the chitosan oligosaccharide product that above-mentioned chitosan oligosaccharide term is set forth basically at present.
Beneficial effect of the present invention:
The present invention has found to be used for the composition pesticide that comprises chitosan oligosaccharide of anti-rice blast; This composition pesticide can resist rice blast; Particularly find the special effect of chitosan oligosaccharide when anti-rice blast of certain concentration, solved the major issue of anti-rice blast, especially used the composition pesticide that comprises chitosan oligosaccharide behind the seed and plant of handling paddy rice; Not only anti-rice blast; And can not have residue of pesticide to doing the deposits yields poisoning, realized the control of the rice blast of environment protection-type.The contribution that the present invention is special also is to use good chance and the concentration that chitosan oligosaccharide is prevented and treated rice blast through having discovered, has improved the effect of chitosan oligosaccharide control rice blast greatly.
Embodiment
In order to understand the present invention, further specify the present invention with embodiment below, but do not limit the present invention.
Embodiment 1:
5wt% chitosan oligosaccharide solution with water is diluted to application corresponding concentration respectively; Concentration is calculated according to weight percent concentration; In outcome record, calculate with ppm (1,000,000/) concentration, what 50ppm represented in the outcome record below is that weight percent concentration is 0.005%.Clear water is handled as contrast.According to demand treatment by stages rice paddy seed and rice plant, seed treatment is that seed soaks with the solution after the dilution, and soak time is 24 hours.The processing mode in other stage is for the chitosan oligosaccharide aqua sprays processing, and be 15 days blanking time that sprays processing.Each processing is observed and is detected through 3 experimental field (667 square metres), and the sample of handling seed germinates crop, and the back is long to be added up to flowering stage, waits until that for the statistics of each phase process in vegetative period the maturing stage adds up after dispenser equally.Add up the percentage of the paddy rice diseased plant generation of every experimental field respectively, just its plant is defined as the virus disease plant as long as produced the characteristic of virus disease.Concrete disposition and effect are following:
Table 1 seed immersion treatment is to the control efficiency of rice blast
Table 2 seedling spraying is to the control efficiency of rice blast
Before blooming, table 3 sprays control efficiency to rice blast
After blooming, table 4 sprays control efficiency to rice blast
The omnidistance control efficiency of handling paddy rice to rice blast of table 5
No matter show through above-mentioned experiment, be to handle, bloom pre-treatment or bloom post processing in treatment by stages rice paddy seed, seedling stage, and chitosan oligosaccharide solution has all shown good anti-rice blast effect.All use chitosan oligosaccharide solution each period in paddy rice, show the preventive effect of good anti-rice blast especially.
Claims (8)
1. a composition pesticide that is used for anti-rice blast comprises chitosan oligosaccharide in this composition pesticide, and the percentage by weight that chitosan oligosaccharide accounts for this composition pesticide is 0.005%-0.02%.Preferably, to account for the percentage by weight of this composition pesticide be 0.01%-0.02% or 0.005%-0.009% to chitosan oligosaccharide.
2. the composition pesticide that comprises chitosan oligosaccharide is used to prevent and treat the purposes of rice blast; The percentage by weight that it is characterized in that comprising chitosan oligosaccharide in the composition pesticide of chitosan oligosaccharide is 0.005%-0.02%; Preferably; The percentage by weight that chitosan oligosaccharide accounts for composition is 0.005%-0.009%, and is perhaps preferred, and the percentage by weight that chitosan oligosaccharide accounts for composition is 0.01%-0.02%.
3. use the method for the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that each stage set of applications compound that paddy rice grows is handled paddy rice, comprise rice paddy seed is handled, perhaps use composition at rice seedling; Perhaps use composition at rice anthesis; Perhaps after paddy rice blooms, use composition, perhaps to rice paddy seed, seedling stage, bloom preceding, use composition successively after blooming, the percentage by weight of chitosan oligosaccharide is 0.005%-0.02% in the wherein said composition; Preferably; The percentage by weight that chitosan oligosaccharide accounts for composition is 0.005%-0.009%, and is perhaps preferred, and the percentage by weight that chitosan oligosaccharide accounts for composition is 0.01%-0.02%.
4. use the method for the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that rice paddy seed is handled; To account for the percentage of composition weight be 0.01%-0.03% to chitosan oligosaccharide in the wherein said composition; Preferably, to account for the percentage of composition weight be 0.01%-0.02% to chitosan oligosaccharide.
5. use the method for the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that seedling stage paddy rice is to the rice application composition; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
6. use the method for the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that before the blooming of paddy rice the rice application composition; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
7. use the method for the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that blooming the back to the rice application composition in paddy rice; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
8. use the method for the composition for preventing and controlling rice blast that comprises chitosan oligosaccharide; It is characterized in that with said composition rice paddy seed being handled, to account for the percentage of composition weight be 0.01%-0.02% to chitosan oligosaccharide in the wherein said composition, then seedling stage of paddy rice to the rice application composition; Use the back first used 1 time in every interval 15-20 days again; Application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide; Then at the preceding applying said compositions of blooming of paddy rice; Use the back first and used 1 time in every interval 15-20 days again, application times is 0-2 time once more, and the concentration of at every turn using is identical or different with the concentration of using first; The percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide; Applying said compositions after paddy rice blooms is used the back first and was used 1 time in every interval 15-20 days again then, and application times is 0-2 time once more; The concentration of at every turn using is identical or different with the concentration of using first, and the percentage by weight of chitosan oligosaccharide is 0.005%-0.009% in the composition of at every turn using that comprises chitosan oligosaccharide.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663325A (en) * | 2013-11-27 | 2015-06-03 | 庞群 | Rice blast prevention and treatment planting method |
| CN106879631A (en) * | 2017-04-19 | 2017-06-23 | 江苏徐淮地区淮阴农业科学研究所 | The inducer of inducing paddy rice blast resisting |
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|---|---|---|---|---|
| CN1520723A (en) * | 2003-01-30 | 2004-08-18 | 中国科学院上海植物生理研究所 | Chitosan oligosaccharide containging pesticide composition and its application |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1520723A (en) * | 2003-01-30 | 2004-08-18 | 中国科学院上海植物生理研究所 | Chitosan oligosaccharide containging pesticide composition and its application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663325A (en) * | 2013-11-27 | 2015-06-03 | 庞群 | Rice blast prevention and treatment planting method |
| CN106879631A (en) * | 2017-04-19 | 2017-06-23 | 江苏徐淮地区淮阴农业科学研究所 | The inducer of inducing paddy rice blast resisting |
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| CN102365948B (en) | 2013-03-20 |
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