A kind of bactericidal composition and its application and fungicide
Technical field
The invention belongs to pesticide field more particularly to a kind of bactericidal composition and its application and fungicide.
Background technique
Bacterial angular leaf spot, also known as bacterial black rot or burst swing disease, the tip of mainly causing harm, leaf and fruit.Do not turn green shoot
Blade of catching an illness shows pinhead-sized pore, after be extended to the small blackspot of protrusion, surrounding has yellow dizzy, and scab is in polygonal, later period
Scab is fused into irregular big blackspot, the raw lobe streak of leaf middle arteries petiole.Raw syringe needle shape black dot on pericarp at the beginning of fruit is caught an illness,
After be extended to crateriform dark brown ulceration, easily induction anthrax-bacilus, the base of a fruit corruption bacterium intrusion.
The regions following the line of the sea such as China Guangdong, Guangxi, Hainan, Fujian mango fruiting later period to autumn growth growth period meets Heavy Rain of Typhoon
It frequently attacks, causes a large amount of machinery wounds, bacterial angular leaf spot pathogenetic bacteria, which often seizes the opportunity to worm one's way into, to cause to fall ill, and it is improper such as to prevent and treat, just
Serious economic loss can be caused to orchard worker.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of bactericidal composition and its application and fungicide, the present invention is mentioned
The bactericidal composition of confession has preferable control efficiency for bacterial angular leaf spot.
The present invention provides a kind of bactericidal compositions, including oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate.
Preferably, the oligosaccharides-copper complex is chitosan oligosaccharide-copper complex.
Preferably, the mass ratio of the oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate is (0.1~10): 1.
Preferably, the mass ratio of the oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate is (0.5~7): 1.
Preferably, the mass ratio of the oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate is 0.6:1.
The present invention provides application of the bactericidal composition described in above-mentioned technical proposal in prevention and treatment bacterial angular leaf spot.
Preferably, the bacterial angular leaf spot is mango bacterial angular leaf spot.
The present invention provides a kind of fungicide, the active constituent of the fungicide is that Claims 1 to 5 is described in any item
Bactericidal composition.
Preferably, mass content of the active constituent in fungicide is 1~20ppm.
Preferably, the dosage form of the fungicide is suspending agent, aqueous emulsion or water dispersible granules.
Compared with prior art, the present invention provides a kind of bactericidal composition and its application and fungicide.The present invention provides
Bactericidal composite include oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate.The present invention is by oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate compounding as sterilization
Composition has fabulous control efficiency to bacterial angular leaf spot, especially mango bacterial angular leaf spot.To provided by the invention
Bactericidal composition carries out the fungistatic effect test of mango bacterial angular leaf spot bacterium, as the result is shown: median effective concentration (EC50) it is minimum can
Up to 1.38, coefficient of synergism (SR) reaches as high as 2.48.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the digital photograph figure of bacterial clump growing state provided in an embodiment of the present invention.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of bactericidal compositions, including oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate.Wherein, the oligosaccharides-copper
Complex compound is preferably chitosan oligosaccharide-copper complex;The mass ratio of the oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate is preferably (0.1~10):
1, more preferably (0.5~7): 1, concretely 0.5:1,0.6:1,0.8:1,1:1,1.2:1,1.5:1,1.7:1,2:1,2.3:
1、2.5:1、2.8:1、3:1、3.2:1、3.5:1、3.7:1、4:1、4.2:1、4.5:1、4.7:1、5:1、5.2:1、5.5:1、
5.7:1、6:1、6.2:1、6.5:1、6.7:1、7:1。
The source of the oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate is not particularly limited in the present invention, can use commercial goods
Or it is prepared according to method well known to those skilled in the art.
The preparation method of the bactericidal composition is also not particularly limited in the present invention, directly mixes each raw material in proportion
Uniformly.
The present invention regard oligosaccharides-copper complex and S-Ethyl ethylthio sulfonate compounding as bactericidal composition, to bacterial angular leaf spot, especially
Mango bacterial angular leaf spot has fabulous control efficiency.The bacillary angle spot of mango is carried out to bactericidal composition provided by the invention
The fungistatic effect of germ is tested, as the result is shown: median effective concentration (EC50) minimum up to 1.38, coefficient of synergism (SR) reaches as high as
2.48。
The present invention also provides a kind of the answering in prevention and treatment bacterial angular leaf spot of bactericidal composition described in above-mentioned technical proposal
With the especially application in biocontrol of mango bacterial angular leaf spot.Application provided by the invention is anti-using the bactericidal composition
Bacterial angular leaf spot is controlled, there is preferable control efficiency.
The present invention also provides a kind of fungicide, the active constituent of the fungicide is sterilization described in above-mentioned technical proposal
Composition.Wherein, mass content of the active constituent in fungicide is preferably 1~20ppm, concretely 1ppm,
1.25ppm、1.5ppm、2ppm、2.25ppm、2.5ppm、3ppm、4ppm、5ppm、6ppm、7ppm、8ppm、9ppm、10ppm、
12ppm, 15ppm, 18ppm or 20ppm;The dosage form of the fungicide includes but is not limited to suspending agent, aqueous emulsion or water-dispersible grain
Agent.In the present invention, other auxiliary agents or auxiliary material contained in the fungicide are not particularly limited, those skilled in the art's root
It is reasonably selected according to actual conditions.
Fungicide provided by the invention is using the bactericidal composition as active constituent, special therefore to bacterial angular leaf spot
It is not that mango bacterial angular leaf spot has fabulous control efficiency.
For the sake of becoming apparent from, it is described in detail below by following embodiment.
Embodiment
1. test strain
Mango bacterial angular leaf spot bacterium (commercially available);
2. test medicine
20wt% chitosan oligosaccharide-copper complex raw medicine, 5wt% S-Ethyl ethylthio sulfonate raw medicine;
3. measuring fungistatic effect
3.1 plan design
Using the fungistatic effect of plate dilution assay method sample;Altogether be arranged 5 different proportions chitosan oligosaccharide-copper complex with
S-Ethyl ethylthio sulfonate compounds sample, and each sample is arranged the mass concentration gradient of 5 active constituents, respectively 20ppm, 10ppm, 5ppm,
In addition 2.5ppm, 1.25ppm are arranged single dose chitosan oligosaccharide-copper complex, single dose S-Ethyl ethylthio sulfonate, control sample clear water, amount to 36 tests
Sample, each test sample replication 3 times, the details of test sample (chitosan oligosaccharide-copper complex in table 1 as shown in table 1
Ratio with S-Ethyl ethylthio sulfonate is pure medicine ratio):
1 test sample information of table
3.2. the preparation of each test sample
Take test sample to be dissolved in aqua sterilisa in super-clean bench, be configured to concentration be 1wt% female medical fluid, constant volume 10mL,
It shakes up spare.
3.3. the preparation of drug containing tablet
The NA culture medium just to have sterilized (50mL/ bottles) is cooled to 45 DEG C or so, mother's 0.5mL medical fluid is drawn with liquid-transfering gun, adds
Enter into culture medium, after mixing inverted plate, is configured to the medicament of 20ppm, 10ppm, 5ppm, 2.5ppm, 1.25ppm concentration
Plate, every bottle of culture medium fall 3 wares.
3.4. bacterium is connect
The preparation of bacterium solution: by sterile working, the big thallus of the grain of rice is chosen in the bacterium of new culture scribing line and is dissolved in 1mL aqua sterilisa
In, it shakes up, dilution 3 × 106Times, for use, goes that the bacterium solution 30uL diluted is taken to be added in pastille culture medium to be coagulated, shake up, most
It is placed on the bacterial clump growing state cultivated in incubator and investigate plate afterwards for 24 hours.As a result as shown in Figure 1, Fig. 1 is of the invention real
The digital photograph figure of the bacterial clump growing state of example offer is provided.
3.5. DATA REASONING
After cultivating 48h.It is classified using ocular estimate by the growing state of bacterium on plate:
: without growth;
+: the growth of bacterium accounts for 1~10% on plate;
++: the growth of bacterium accounts for 11~25% on plate;
+++: the growth of bacterium accounts for 26~50% on plate;
The growth of bacterium accounts for 51% or more on ++++: plate.
3.6. test result analysis (being shown in Table 2~4)
Table 2 is using ocular estimate by the growing state statistical result of bacterium on plate
Table 3 is using ocular estimate by the statistical result of bacteria colony count (unit: a) on plate
4 regression equation of table, EC50With SR result
|
Regression equation |
r |
EC50 |
x1 |
x2 |
SR (synergy) |
A |
Y=4.1292+0.8086x |
0.8738 |
11.94 |
3.47 |
11.93 |
0.29 |
B |
Y=4.8603+0.3814x |
0.9960 |
2.32 |
3.43 |
2.3243 |
1.48 |
C |
Y=4.4142+1.2546x |
0.9942 |
2.93 |
3.36 |
2.9303 |
1.15 |
D |
Y=4.6349+0.4346x |
1 |
6.92 |
3.3 |
6.9196 |
0.48 |
E |
Y=4.6274+2.6436x |
0.9468 |
1.38 |
3.22 |
1.3 |
2.48 |
F |
Y=4.5380+0.8446x |
0.7543 |
3.52 |
|
|
|
G |
Y=4.4979+1.1251x |
1.0000 |
2.79 |
|
|
|
By table 2 and table 3 it can be seen that high concentration 20ppm is grown almost without bacterium colony, and A and its F have a small amount of bacterium colony raw
It is long, it can be seen that E and D is stronger to the inhibition virulence of mango bacterial angular leaf spot bacterium, in relatively high concentration in compounded combination
Almost without bacterial growth, E is preferable to the inhibition of the bacterium for the sterile length of being born of 20ppm, 10ppm, 5ppm, especially compounded combination D, E,
Preferable than single dose S-Ethyl ethylthio sulfonate, from the point of view of compounded combination, S-Ethyl ethylthio sulfonate content is higher, inhibits virulence stronger, from range estimation bacterium colony growth
Situation is it is not difficult to find that D, E inhibit virulence stronger, and clump count is less, and especially the clump count of compounding E significantly lacks and compares single dose
S-Ethyl ethylthio sulfonate.
It can be seen from Table 4 that: the toxicity for compounding E is very strong, and there are SP > 1.5 to have synergistic effect, other compoundings are without synergy
Effect.Inhibition virulence sequence between each sample is successively are as follows: E > B > G > C > F > D > A.This test discovery E is optimal compounded combination
That is: chitosan oligosaccharide-copper complex: S-Ethyl ethylthio sulfonate=3:5 (mass ratio), EC50It is 1.38, effect is stronger than single dose S-Ethyl ethylthio sulfonate.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.