CN103988847B - Bactericidal composition containing chitosan oligosaccharide and dithiocyano-methane - Google Patents

Bactericidal composition containing chitosan oligosaccharide and dithiocyano-methane Download PDF

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CN103988847B
CN103988847B CN201410249256.6A CN201410249256A CN103988847B CN 103988847 B CN103988847 B CN 103988847B CN 201410249256 A CN201410249256 A CN 201410249256A CN 103988847 B CN103988847 B CN 103988847B
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dithiocyano
composition
methane
chitosan oligosaccharide
disease
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CN103988847A (en
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侯华民
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Hainan Zhengye Biotechnology Co ltd
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Hainan Zhengye Zhongnong Hi Tech Co Ltd
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Abstract

The invention belongs to plant protection art, be specifically related to the bactericidal composition of chitosan oligosaccharide and dithiocyano-methane.In composition, the mass ratio of dithiocyano-methane and chitosan oligosaccharide is 40:1-1:40, the percentage that the quality summation of chitosan oligosaccharide and dithiocyano-methane accounts for composition gross mass is 0.1-80%, and composition is for preventing and treating nematode, fusarium wilt, bakanae disease of rice and pepper ralstonia solanacearum etc.

Description

Bactericidal composition containing chitosan oligosaccharide and dithiocyano-methane
Technical field
The invention belongs to plant protection art, particularly relate to the bactericidal composition containing chitosan oligosaccharide and dithiocyano-methane and purposes.
Background technology
Along with the change of cropping system, the occurrence and infection of plant disease is on the rise, and the pesticide resistance of cause of disease to bactericide also improves thereupon, and exploring agricultural chemicals that is efficient, low toxicity becomes one of hot issue of related scientific research and managing and serving system concern.Chitosan oligosaccharide, in the process resisting pathogen erosion, can be induced and excite plant to produce a series of defense reaction, and these defense reactions synergy stops propagation and the invasion of pathogen, reaches the effect of preventing and curing diseases.Dithiocyano-methane (MBT) is that one efficiently kills algae sterilization chemicals, MBT has efficient killing effect for the main bacteria existed in cycle water, fungi and algae (all kinds of fungi), and duration of efficacy is long, the pH value of adaptation and wider range.Use the consumption of 3-4PPM to the sterilizing rate of heterotroph, nitrite bacteria, sulfosalt reducing bacteria, Escherichia coli, iron wire bacterium, anaerobic bacteria, denitrifying bacterium and sulphur bacteria up to more than 99%, also can reach high sterilizing rate to other all kinds of bacterium.In all kinds of fungi of removing, dithiocyano-methane is than the better effects if of its homicide/degerming medicine.Its stoste is stablized, and can degrade rapidly or decompose again, can not cause secondary pollution, highly-effective low-residue to environment when applying.To bakanae disease of rice and Aplelenchiodes bessegi of rice, stripe disease of barley, net blotch, covered smut etc., there is higher preventive effect.Also there is good preventive effect to kind of other disease passed caused by nematode, bacterium and fungi simultaneously, under recommended dose, to rice Wheat Seeds safety, and have certain effect to raising Germination Percentage of Rice and percentage establishment of seedling.
Inventor has carried out large quantity research to the composition containing chitosan oligosaccharide and dithiocyano-methane, has found some unexpected effects, so complete the present invention.
Summary of the invention
The object of this invention is to provide bactericidal composition containing chitosan oligosaccharide and dithiocyano-methane with synergistic effect and uses thereof.
Concrete, the invention provides the bactericidal composition containing chitosan oligosaccharide and dithiocyano-methane, wherein the mass ratio of chitosan oligosaccharide and dithiocyano-methane is 40:1-1:40, and preferably, mass ratio is 10:1-1:10.
In above-mentioned composition, the percentage that the quality summation of chitosan oligosaccharide and dithiocyano-methane accounts for composition gross mass is 0.1-80%.
Above-mentioned composition, is characterized in that composition is with seed dressing, spraying, filling root, immersion applications.
Present invention also offers above-mentioned composition for preventing and treating the purposes of crop pest, wherein said crop is cereal crops, vegetables, forest or other crops, and cereal crops are paddy rice, peanut, corn, soybean, potato, Chinese sorghum or wheat; Vegetables are cucumber, capsicum, tomato, celery, spinach, Chinese cabbage or beet; Forest is willow, pine tree, cypress, cocoanut tree or bamboo grows, and other crops are banana, watermelon, apple, pear tree, tobacco or oranges and tangerines.
In such use, the disease of suitable control comprises: nemas, virus disease, the fungus-caused fusarium wilt of Deuteromycotina, gray mold etc., the fungus-caused bakanae disease of Ascomycotina, powdery mildew, stalk break etc., the banded sclerotial blight that Basidiomycotina causes, rust, smut etc., the fungus-caused downy mildew of Mastigomycotina, late blight etc.
The purposes of foregoing, preferably, disease is banana root-knot nematode, cucumber root-knot nematode, watermelon blight, bakanae disease of rice and banded sclerotial blight, pepper virus disease, Botrytis cinerea and pepper ralstonia solanacearum etc.
Beneficial effect of the present invention is:
1, synergistic effect is obvious: composition shows good synergistic effect in certain ratio range, improves the protection effect of composition.
2, expanding prevention spectrum: composition can prevent and treat the multiple diseases in agricultural production.
3, use cost is reduced: because of composite, there is raising preventive effect, the increase of control spectrum, decrease access times, reduce use cost;
4, delay pesticide resistance: the composition of two kinds of different mechanism of action is composite, and pathogen not easily develops immunity to drugs, delay pathogen to the drug-fast generation of single dose.
Embodiment
The following stated, only for explaining the present invention, for not departing from amendment that the present invention's spirit and principle make, replacement or improvement, all belongs to the scope of protection of present invention.
The composition of embodiment 1 chitosan oligosaccharide and dithiocyano-methane is to the effect of banana root-knot nematode
The composition of dithiocyano-methane single dose, chitosan oligosaccharide single dose and certain mass ratio is diluted to certain variable concentrations.Drip on slide by the quantitative dilution containing banana root-knot nematode, microscopy counts; Microscopy is mixed into the root-knot nematode dilution of quantitative pharmacy in the same way, and microscopy counts, and measures each reagent agent lethal concentration of 50 LC respectively 50, according to the co-toxicity coefficient (CTC value) of the abundant method calculation composition of Sun Yun, CTC value be greater than 120 for synergistic effect, concrete grammar is as follows.
Set a kind of single dose (A) for standard single dose, specify its toxicity index (TI) to be 100, then:
The percentage of TI × single dose in mixture of theoretical toxicity index (the TTI)=each single dose of Σ of mixture
Result is as following table 1.
The composition of table 1 chitosan oligosaccharide and dithiocyano-methane is to the synergistic effect of banana root-knot nematode
As can be seen from Table 1, when the proportioning of chitosan oligosaccharide and dithiocyano-methane is 40:1-1:40, the co-toxicity coefficient of composition to banana root-knot nematode is all greater than 120, illustrates that the synergistic effect of the composition of chitosan oligosaccharide and dithiocyano-methane to banana root-knot nematode is obvious.
The composition of embodiment 2 chitosan oligosaccharide and dithiocyano-methane is to the preventive effect of cucumber nematode
Compost is mixed into sterilized soil and sterilizing river sand, be mixed into composition or single dose, fully mix thoroughly, add clear water and make water content 30%, load basin alms bowl, have the cucumber seedling of 2 true leaves to be transplanted in basin growth, transplant latter 7 days, every basin access Meloidogyne incognita 2 instar larvae 200, be placed in greenhouse, quantitative watering manages.If often process 3 repetitions, and set and be not mixed into chemicals treatment as blank.After 20 days, when blank plant rhizosphere has a large amount of root knot, investigation plant height and preventive effect.Record every strain root knot number, and carry out classification by Liu Weizhi (1995): 0 grade, without root knot; 1 grade, 1-2 root knot; 2 grades, 3-10 root knot; 3 grades, 11-30 root knot; 4 grades, 31-100 root knot; 5 grades, more than 100 root knots.The results are shown in Table 2.
The composition of table 2 chitosan oligosaccharide and dithiocyano-methane is to the effect of cucumber root-knot nematode
Table 2 shows, relative to corresponding single dose and blank, the process plant height of the composition of chitosan oligosaccharide and dithiocyano-methane significantly improves, and root knot number obviously reduces, and disease obviously alleviates.Illustrate that composition is obvious to the control efficiency of cucumber root-knot nematode, promote plant growth.
The composition of embodiment 3 chitosan oligosaccharide and dithiocyano-methane is to the effect of watermelon blight
According to scheme, preparation built agent and unit dose preparation, and carry out active preliminary experiment.According to trial test, by the concentration that Formulation becomes to need.Before selecting, stubble watermelon blight morbidity field, arranges field evenly.Evenly dress seed (concentration is with effective milligram of gauge of every kilogram of seed with medicament) with the suspension seed-coating agent of different agents, sow, Routine Management.Watermelon plant diseases situation is investigated when disease onset.Use Abbot formula, convert percentage to preventive effect.
In theoretical effect, the effect of the substance A that x is concentration when being a, the effect of the substance B that y is concentration when being b, compares theoretical effect and actual effect, evaluates the synergy of composition, for synergistic effect when being greater than theoretical preventive effect with actual preventive effect.Composition the results are shown in Table 3 to watermelon disease.
The composition of table 3 chitosan oligosaccharide and dithiocyano-methane is to the effect of watermelon blight
By the test of composition to watermelon blight, as seen from Table 3, the composition of chitosan oligosaccharide and dithiocyano-methane is to the theoretical preventive effect of the effect of watermelon blight higher than correspondent composition.Obviously, the composition of chitosan oligosaccharide and dithiocyano-methane is synergy to watermelon blight.
The composition of embodiment 4 chitosan oligosaccharide and dithiocyano-methane is to the effect of rice disease
According to scheme, preparation built agent and unit dose preparation, and carry out active preliminary experiment.According to determination of activity trial test, by the concentration that Formulation becomes to need.Select once to fall ill rice field, carry out paddy rice seed dressing (concentration is with effective milligram of gauge of every kilogram of seed with medicament), sowing, seedling.Institute an inquiry when blank bakanae disease of rice, banded sclerotial blight evil occur, often process is by 5 samplings, often 50 strains, measures the percentage that plant blade face is infected.Use Abbot formula, convert percentage to preventive effect.
In theoretical effect, the effect of the substance A that x is concentration when being a, the effect of the substance B that y is concentration when being b, compares theoretical effect and actual effect, evaluates the synergy of composition, for synergistic effect when being greater than theoretical preventive effect with actual preventive effect.Composition the results are shown in Table 4 to rice plant disease.
The composition of table 4 chitosan oligosaccharide and dithiocyano-methane is to the field efficacy of rice disease
As seen from Table 4, the composition of chitosan oligosaccharide and dithiocyano-methane when 1:1 and 4:1, composition to the actual effect of bakanae disease of rice, rice sheath blight disease all higher than the theoretical preventive effect of composition.Obviously, the composition of chitosan oligosaccharide and dithiocyano-methane is synergy to bakanae disease of rice, rice sheath blight disease.
The composition of embodiment 5 chitosan oligosaccharide and dithiocyano-methane is to the effect of pepper diseases
According to scheme, preparation built agent and unit dose preparation, and carry out active preliminary experiment.According to determination of activity trial test, by the concentration that Formulation becomes to need.Establish corresponding single dose and blank in capsicum field before test, adopt the conventional conventional spray of manual sprayer, every medicament sprays 50 strains.7-10d dispenser 1 time again after 1st dispenser.10-20d after 2nd dispenser, investigates pepper plant disease incidence of listing.Use Abbot formula, convert percentage to preventive effect.
In theoretical effect, the effect of the substance A that x is concentration when being a, the effect of the substance B that y is concentration when being b, compares theoretical effect and actual effect, evaluates the synergy of composition, for synergistic effect when being greater than theoretical preventive effect with actual preventive effect.Composition to the result of pepper plant disease respectively in table 5.
The composition of table 5 chitosan oligosaccharide and dithiocyano-methane is to the field efficacy of pepper diseases
As seen from Table 5, the composition containing chitosan oligosaccharide and dithiocyano-methane all higher than theoretical effect, shows that composition has obvious synergistic function to the actual effect of pepper virus disease, gray mold and bacterial wilt.

Claims (7)

1. contain the bactericidal composition of chitosan oligosaccharide and dithiocyano-methane, it is characterized in that the mass ratio of chitosan oligosaccharide and dithiocyano-methane is 40:1-1:40.
2. composition according to claim 1, is characterized in that chitosan oligosaccharide and dithiocyano-methane mass ratio are 10:1-1:10.
3. composition according to claim 2, is characterized in that the percentage that the quality summation of chitosan oligosaccharide and dithiocyano-methane accounts for composition gross mass is 0.1-80%.
4. composition according to claim 3, is characterized in that composition is with seed dressing, spraying, filling root, immersion applications.
5. composition according to claim 4 is for preventing and treating the purposes of crop pest, and wherein said crop is cereal crops, vegetables, forest or other crops, and cereal crops are paddy rice, peanut, corn, soybean, potato, Chinese sorghum or wheat; Vegetables are cucumber, capsicum, tomato, celery, spinach, Chinese cabbage or beet; Forest is willow, pine tree, cypress, cocoanut tree or bamboo grows, and other crops are banana, watermelon, apple, pear tree, tobacco or oranges and tangerines.
6. purposes according to claim 5, the disease of suitable control comprises: nemas, virus disease, the fungus-caused fusarium wilt of Deuteromycotina, gray mold, the fungus-caused bakanae disease of Ascomycotina, powdery mildew, stalk break, the banded sclerotial blight that Basidiomycotina causes, rust, smut, the fungus-caused downy mildew of Mastigomycotina, late blight.
7. purposes according to claim 6, disease is banana root-knot nematode, cucumber root-knot nematode, watermelon blight, bakanae disease of rice and banded sclerotial blight, pepper virus disease, Botrytis cinerea.
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CN106305759B (en) * 2016-08-22 2018-06-08 永春锐拓信息技术中心 A kind of composition pesticide of fluorine-containing thiophene worm sulfone and dithiocyano-methane
CN110946149B (en) * 2019-12-09 2021-11-30 王映镝 Bactericidal and algae-killing synergistic composition for paint, coating, water body and wood and application thereof

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CN102138554B (en) * 2010-02-02 2015-03-11 梅州市凤兴环保科技有限公司 Method for preparing methylene dithiocyanate emulsion serving as efficient bactericide

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Denomination of invention: Bactericidal composition containing chitosan oligosaccharide and methylene dithiocyanate

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