CN102369928B - Chitosan oligosaccharide combination for killing thrips and use and use method thereof - Google Patents
Chitosan oligosaccharide combination for killing thrips and use and use method thereof Download PDFInfo
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- CN102369928B CN102369928B CN2011103321566A CN201110332156A CN102369928B CN 102369928 B CN102369928 B CN 102369928B CN 2011103321566 A CN2011103321566 A CN 2011103321566A CN 201110332156 A CN201110332156 A CN 201110332156A CN 102369928 B CN102369928 B CN 102369928B
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Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to a chitosan oligosaccharide combination for killing thrips and a use and a use method thereof. Specifically, the invention provides a pesticide combination for killing thrips, which contains chitosan oligosaccharide which accounts for 0.005-0.02 weight percent of the pesticide combination. The invention additionally provides a use of the pesticide combination containing the chitosan oligosaccharide for preventing and controlling the thrips and a method for using the combination containing the chitosan oligosaccharide to prevent and control the thrips. The pesticide combination solves the important problem in killing the thrips. Especially after the pesticide combination containing the chitosan oligosaccharide is used for treating crops which are jeopardized by thrips diseases, not only can the thrips be killed, but also no pesticide damage is caused to the crops, no residual pesticide exists and the environmental-friendly prevention and control of the thrips are realized.
Description
Technical field
The invention belongs to agrochemical field, particularly relate to the control composition of thrips and prevent and treat method, relate to particularly a kind of be used to killing chitosan oligosaccharide composition and use thereof and the method for thrips.
Background technology
Thrips microbody insect, become various crop Occurrences, and it becomes the long 1.0-1.3 millimeter of polypide, and greater than male worm, while just sprouting wings, body colour is light brown, after be gradually dark brown to black, head is closely square, feeler 7 joints, 6-7 joint and body colour are same.Pronotary prosperity, trailing edge have 4, hair on the neck, and two pairs of wings are close to the body back of the body, and fore wing is large than hind wing, and the tassel capillary is long, and vein is obvious, belly taper 10 joints.Just the weak worm of hatching is the yolk look.
The leaf of thrips damage to crops, flower and fruit.The nymph that has just hatched, the lobus cardiacus harm that does not launch the children takes food, and the food trace is white point, is linked to be strip later.When lobus cardiacus launched, at the killed vestige that symmetrical yellow-white appears in middle part and the vein both sides of blade, blade gradually became shrunk, even whole blade bleaches and is withered, at florescence main harm bud and inflorescence, smashes pollen flying, thereby formation pseudocarp, adult are distributed in the upper of plant more.
The chemical agent of control thrips has benzene to dislike prestige wetting powder, Imidacloprid, Padan, dimehypo, malathion missible oil, orthene, Uranus, cypermethrin, alpha-cypermethrin, Frontline, quinalphos, good Nian Dong etc.
There is no at present fully agricultural chemicals and the scientific and effective method of preventing and treating that can either environmental protection can effectively prevent and treat again thrips
The present inventor is by long-term field research, and acquisition can effectively prevent and treat the chitosan oligosaccharide agricultural chemicals of thrips, finds that chitosan oligosaccharide is effective chemical substance of control thrips.And by further investigation, obtained the control thrips chitosan oligosaccharide concentration, application process and use period.
Summary of the invention
For solving the problems of the technologies described above, the invention provides and a kind ofly be used to killing the composition pesticide of thrips, in this composition pesticide, comprise chitosan oligosaccharide, 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 0.005%-0.01% 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 use, and solid pharmaceutical preparation is also any solid pharmaceutical preparation of agriculture use.Preferably, liquid preparation is 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 of chitosan oligosaccharide that comprises be used to preventing and treating the purposes of thrips, 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, to account for the percentage by weight of composition be 0.005%-0.01% to chitosan oligosaccharide.
The present invention also provides application to comprise the method for the composition for preventing and controlling thrips of chitosan oligosaccharide, it is characterized in that using composition at the sick initial stage of sending out of thrips, then every time of 5-10 days, preferably every the time of 7 days, again use the composition identical or different with application concentration first 0-3 time, preferably, use composition 2 times, in wherein said composition, the percentage by weight of chitosan oligosaccharide is 0.005%-0.02%, and preferred, the percentage by weight that chitosan oligosaccharide accounts for composition is 0.005%-0.01%.
In said method, described composition can prepare liquid preparation or solid pharmaceutical preparation.Liquid preparation can be any liquid preparation of agriculture use, and solid pharmaceutical preparation is also any solid pharmaceutical preparation of agriculture use.Preferably, liquid preparation is aqua, microemulsion, water dispersible granules or suspending agent; Solid pharmaceutical preparation is preferably wetting powder or granule.
In said method, any method of effectively commonly using the when method of using refers to the applications of pesticide, include but not limited to powder injection process, spray-on process, fumigating system, soil treatment method or smog method etc.
Wherein powder injection process refers to and utilizes the wind-force that duster produces the agricultural chemicals of pulvis to be sprinkling upon equably to the surface of crop or controlling object; Spray-on process refers to a certain amount of agricultural chemicals and appropriate water and is made into liquid, with the spraying apparatus, medicine liquid spray is become to droplet, is evenly distributed in crop or controlling object surface; Fumigating system refers to 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 refers to and takes to spray, dusts, spreads the methods such as pesticide-clay mixture, and agricultural chemicals is imposed in ground or certain soil layer equably; The smog method refers to utilizes special-purpose facility that the oily pesticide dispersion is become to smoke condition, to reach the method for Pesticidal and sterilizing weeding.
In said method, the sick initial stage of sending out of thrips refers to that thrips is sick and sends out firm the incipient stage, ordinary circumstance, and this stage can judge by range estimation to those skilled in the art, when the thrips damage to crops is namely arranged, the stage that particularly has the thrips insect population to occur.Particularly, also can judge by the mode of quantitative detection, be the sick initial stage of sending out of thrips the period below 3% that the plant of namely thrips insect population appearance accounts for total plant quantity.
In the present invention, chitosan oligosaccharide is that the degree of polymerization that Glucosamine is formed by connecting by Isosorbide-5-Nitrae-glycosidic bond is the mixture of the high molecular polymer of 2-30, and mean molecule quantity is 1000-3000 dalton.Can prepare by any means by chitosan oligosaccharide, such as following method: deacetylation is the mixture of the chitosan oligomer of 2-30 at the shitosan more than 70% by the degree of polymerization that the methods such as mechanical degradation method, chemical degradation method, enzyme edman degradation Edman, glycosyl transfer method, composite degradation method prepare.Perhaps, by the degree of polymerization that obtains chitin from extraction fungal cell wall and prepare by methods such as mechanical degradation method, chemical degradation method, enzyme edman degradation Edman, glycosyl transfer method, composite degradation methods, be the mixture of the chitosan oligomer of 2-30.Perhaps, by by Glucosamine, by the degree of polymerization that Isosorbide-5-Nitrae-the glycosidic bond chemosynthesis is polymerized, being the mixture of the polymer of 2-30.Chitosan oligosaccharide is the mixture of the high molecular polymer of different polymer at present, that is to say in 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 all may exist.So no matter by which kind of method, prepare; the commercially available prod that perhaps prepares by 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 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 is all the chitosan oligosaccharide product that above-mentioned chitosan oligosaccharide term is set forth basically at present.
In the present invention, chitosan oligosaccharide includes but not limited to Frankliniella occidentalis (Frankliniella occidentalis), beautiful flower thrips (F.intonsa), golden thistle horse (Thripsflavus), yellow chest thrips (T.hawaiiensis), palm thrips (T.palmi), onion thrips (T.tabaci), the yellow hard thrips (Scirto-thrips dorsalis) of tea, holds large thrips (Megalurothrips distalis), China letter pipe thrips (Haplothrips chinensis) and Thripssp. for the kind of preventing and treating the thrips that occurs on crop.
Chitosan oligosaccharide composition for preventing and controlling crop of the present invention can be the crop of any generation thrips disease, includes but not limited to as pawpaw, capsicum, cucumber, capsicum, eggplant etc.
Beneficial effect of the present invention:
The present invention has found be used to killing the composition pesticide that comprises chitosan oligosaccharide of thrips, this composition pesticide can be killed thrips, particularly found the special effect of chitosan oligosaccharide when killing thrips of specific concentrations, the major issue of thrips is killed in solution, especially use the composition pesticide that comprises chitosan oligosaccharide after crop is caught an illness in processing, not only kill thrips, and can be to not doing the deposits yields poisoning, there is no residue of pesticide, realized the control of the thrips of environment protection-type.The special contribution of the present invention also is to have found by research good chance and the concentration of application chitosan oligosaccharide control thrips, has greatly improved the effect of chitosan oligosaccharide control thrips.
Embodiment
In order to understand the present invention, below with embodiment, further illustrate the present invention, but do not limit the present invention.
Embodiment 1:
5% chitosan oligosaccharide solution with water is diluted to respectively to corresponding application concentration, concentration is calculated according to weight percent concentration, in outcome record, with ppm (1,000,000/) concentration, calculate, what in outcome record below, 50ppm represented is that weight percent concentration is 0.005%.Clear water is processed in contrast.Solution after dilution is in to the capsicum of thrips their early stage according to the demand treatment by stages, be 7 days interval time that sprays processing.Each processing is observed and is detected by 3 experimental field (100 square metres), adds up respectively the PD situation of the thrips of every experimental field.Be that thrips nibbles and bites the plant quantity that capsicum has an insect population and account for 3 ± 0.25% of the total plant number of capsicum the opportunity of application chitosan oligosaccharide solution-treated thrips.The thrips control efficiency has the ratio situation of change statistics of thrips insect population quantity by inspection.
The insect population number of control efficiency=(the insect population number of the insect population number of blank-processing ensuing crop)/blank * 100% carries out assembly average according to every experimental field while adding up, for example in the experimental field of 100 square metres, plant is counted the X strain, calculate the average population number of X strain, comprise and processing and blank, the calculating that is not always the case, calculate average control efficiency with this.
Concrete disposition and effect are as follows:
On table 1 capsicum, the thrips insect pest initial stage is used the control efficiency of chitosan oligosaccharide solution to thrips
By above-mentioned experiment, show, no matter being that the single treatment thrips is sick sends out the capsicum at initial stage or processes continuously the sick capsicum that sends out the initial stage of thrips, all thrips has been produced to good control efficiency, can control the PD of thrips, until reach, kills thrips.
Embodiment 2
According to the method for embodiment 1, for tomato, pawpaw, test, find that on tomato and pawpaw, using chitosan oligosaccharide solution can effectively prevent and treat generation and the development of thrips equally.
Concrete experimental result is as follows:
The table 2 tomato thrips insect pest initial stage is used the control efficiency of chitosan oligosaccharide solution to thrips
The table 3 pawpaw tomato thrips insect pest initial stage is used the control efficiency of chitosan oligosaccharide solution to thrips
Claims (4)
1. comprise the composition pesticide of chitosan oligosaccharide be used to preventing and treating the purposes of thrips, 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%.
2. purposes according to claim 1, wherein to account for the percentage by weight of composition be 0.005%-0.01% to chitosan oligosaccharide.
3. application comprises the method for the composition for preventing and controlling thrips of chitosan oligosaccharide, it is characterized in that using composition at the sick initial stage of sending out of thrips, then every time of 5-10 days, again use the composition identical or different with application concentration first 0-3 time, in wherein said composition, the percentage by weight of chitosan oligosaccharide is 0.005%-0.02%.
4. method according to claim 3, it is characterized in that using composition at the sick initial stage of sending out of thrips, then every the time of 7 days, again use the composition identical or different with application concentration first 2 times, in wherein said composition, the percentage by weight of chitosan oligosaccharide is 0.005%-0.01%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120673A (en) * | 2007-09-19 | 2008-02-13 | 雷庆峰 | Nontoxic pesticide and preparing method thereof |
| CN102144637A (en) * | 2010-12-23 | 2011-08-10 | 海南正业中农高科股份有限公司 | Chitosan oligosaccharide composite with cold-resistant function and application of composite |
| CN102144639A (en) * | 2010-12-23 | 2011-08-10 | 海南正业中农高科股份有限公司 | Chitosan oligosaccharide composite with drought resisting function and application of composite |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101120673A (en) * | 2007-09-19 | 2008-02-13 | 雷庆峰 | Nontoxic pesticide and preparing method thereof |
| CN102144637A (en) * | 2010-12-23 | 2011-08-10 | 海南正业中农高科股份有限公司 | Chitosan oligosaccharide composite with cold-resistant function and application of composite |
| CN102144639A (en) * | 2010-12-23 | 2011-08-10 | 海南正业中农高科股份有限公司 | Chitosan oligosaccharide composite with drought resisting function and application of composite |
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