Medicament composition for effectively removing water hyacinth

Abstract

The invention relates to a pharmaceutical composition for effectively removing water hyacinth, the pharmaceutical composition is mainly formed by compounding active ingredients of flumioxazin, pendimethalin and s-metolachlor, the mass ratio of the flumioxazin to the pendimethalin to the s-metolachlor is (0.75-25): (0.2-200): (0.3-300), and the dosage of the active ingredients ranges from 0.75 mg / L to 525 mg / L. After flumioxazin, pendimethalin and s-propisochlor are applied to the water hyacinth, generation of new leaves of the water hyacinth can be effectively inhibited, withering and rotting of the leaves are promoted, generation of new roots and plant rejuvenation are inhibited, a remarkable inhibition effect is achieved, the rotted water hyacinth can serve as nutrients for growth of various aquatic organisms after entering sludge at the bottom of a water body, and the water hyacinth can be used as a nutrient for growth of the aquatic organisms. And the effect of recycling resources is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of pharmaceutical compositions and crop growth control, and specifically relates to a pharmaceutical composition for effectively removing water hyacinth. The pharmaceutical composition is mainly compounded by fluazifop-butyl, pendimethalin and S-isopropylamine, and is particularly suitable for the growth prevention and control of water hyacinth to achieve the purpose of killing water hyacinth. Background Art

[0002] Water hyacinth is also known as water lily. Its scientific name is Eichhornia crassipes (Mart.) Solms. It belongs to the genus Eichharnia of the family Pontederiaceae. It is native to South America. It has the characteristics of alkaline resistance, fertilizer resistance, strong pollution resistance, few natural enemies, strong disease resistance, and strong invasion ability. It is one of the top ten harmful plants in the world. Although water hyacinth can treat sewage, its reproduction speed in water is too fast. Whether in rivers, ponds or canals, it is easy to form a dominant community of a single species, resulting in the isolation of sunlight, air and water bodies, making it impossible for other aquatic organisms to survive, anaerobic microorganisms to breed in large numbers, and beneficial microorganisms to die in large numbers, making the water body eutrophic, and even turning black and smelly. Under suitable environmental conditions, one water hyacinth can effectively reproduce about 250,000 new plants within 90 days. It is internationally recognized as one of the fastest growing plants and is extremely difficult to kill completely. How to efficiently control water hyacinth, effectively prevent the formation of new roots and leaves of wilted water hyacinth, and achieve stable and long-term killing effects has become a major problem in water hyacinth prevention and control.

[0003] Fluazifop-butyl is an N-phenylphthalimide herbicide launched by Sumitomo Chemical Co., Ltd. of Japan in 1993. It is mainly used to control grass weeds and broadleaf weeds on crops such as soybeans, sugarcane, and cotton.

[0004] Pendimethalin is an organic compound with the molecular formula C 13 H 19 N 3 O 4 , belongs to the dinitroaniline herbicide. It is mainly used to inhibit the division of meristem cells. It does not affect the germination of weed seeds, but works after the young shoots, stems and roots absorb the agent during the germination of weed seeds. It is mostly suitable for corn, soybeans, cotton, vegetables and orchards to control annual grass and broad-leaved weeds such as crabgrass, foxtail grass, bluegrass, foxtail, goosegrass, gray lily, champignon intestine, nightshade, quinoa, amaranth, etc. It also has a strong inhibitory effect on the growth of dodder seedlings.

[0005] S-Isopropylamine is an organic compound with the molecular formula C 15 H 22 ClNO 2It is a selective pre-emergence herbicide, mainly used for corn, soybeans, peanuts, and sugarcane. It can also be used for crops such as cotton, rapeseed, potatoes, onions, peppers, cabbage, etc. in non-sandy soils to control annual weeds and certain broad-leaved weeds.

[0006] The present application adopts a fluazifop-pentyl-dimethoate-S-isopropylamine pharmaceutical composition to control the regeneration and recovery of leaves and roots of water hyacinth, promote the decomposition of water hyacinth, and provide theoretical and technical support for the control of water hyacinth. Summary of the invention

[0007] The present invention aims to overcome the defects of the prior art and provide a pharmaceutical composition for effectively removing water hyacinth. The pharmaceutical composition is mainly composed of fluazifop-butyl, pendimethalin and S-isopropylamine, which can effectively prevent and control the regeneration and regeneration of leaves and roots of water hyacinth, promote the corruption of water hyacinth, and is particularly suitable for the growth control of water hyacinth to achieve the killing of water hyacinth, providing theoretical support for the prevention and control of water hyacinth.

[0008] To achieve the above object, the present invention adopts the following technical solution:

[0009] A pharmaceutical composition for effectively removing water hyacinth, wherein the pharmaceutical composition is mainly compounded with effective ingredients of flumioxazolidinone, pendimethalin and metolachlor, and the mass ratio of flumioxazolidinone, pendimethalin and metolachlor is 0.75-25:0.2-200:0.3-300. After flumioxazolidinone, pendimethalin and metolachlor are applied to water hyacinth, the new leaf formation of the water hyacinth can be effectively inhibited, the withering and decay of the leaves can be promoted, the new root formation and the regeneration of the plant can be inhibited, and the decomposed water hyacinth can be used as nutrients for the growth of various aquatic organisms after entering the silt at the bottom of the water body, thereby achieving the effect of resource recycling.

[0010] Specifically, the mass ratio of fluazifop-butyl, pendimethalin and S-metolachlor may be further preferably 0.75-25:0.2-200:0.3-30, and the most preferred mass ratio is 2.5:20:30.

[0011] Furthermore, the pharmaceutical composition can be made into a dosage form allowed for pesticides from active ingredients and adjuvants, and the dosage form includes but is not limited to wettable powders, soluble powders, water-dispersible granules, suspensions, emulsifiable concentrates, emulsions in water, microemulsions or microcapsules, etc. The preferred dosage form is emulsifiable concentrate.

[0012] Furthermore, the present invention provides an emulsifiable concentrate composition for effectively removing water hyacinth, which is composed of the following raw materials in weight percentage: 0.75%-52.5% of active ingredient, 5%-9% of calcium dodecylbenzene sulfonate, 6%-10% of nonylphenol polyoxyethylene ether, 10% of co-solvent cyclohexanone, and the remainder is solvent solvesso 150. More preferably, the sum of the mass percentages of emulsifier calcium dodecylbenzene sulfonate and nonylphenol polyoxyethylene ether is 15%.

[0013] The present invention provides an application of the above-mentioned pharmaceutical composition for effectively removing water hyacinth in preventing, controlling and killing water hyacinth, wherein the death of the above-water part of water hyacinth can be promoted by inhibiting the germination of new leaves and promoting the withering of leaves, and the formation of the root system of water hyacinth can be inhibited by inhibiting the germination of new roots of water hyacinth and promoting root necrosis.

[0014] Further, the pharmaceutical composition can be applied to the water hyacinth in mid-June, once.

[0015] When the above-mentioned pharmaceutical composition is used, the total mass concentration of fluazifop-butyl, pendimethalin and s-metolachlor is measured, and the pharmaceutical composition can be prepared into a liquid with an active ingredient concentration between 0.75 mg / L and 525 mg / L, and the water hyacinth leaves are sprayed. More preferably, the pharmaceutical composition is prepared into a liquid with an active ingredient concentration between 0.75 mg / L and 255 mg / L, and the most preferred concentration is 52.5 mg / L.

[0016] The present invention provides the use of the above-mentioned drug composition for effectively removing water hyacinth in promoting the decomposition of water hyacinth and preventing the regeneration of water hyacinth, wherein the decomposed water hyacinth sinks to the bottom of the water and can be used as fertilizer for various aquatic organisms, thereby promoting the recycling of resources. The herbicide composition of fluazifop-butyl, pendimethalin and propiachlor can improve the killing effect of a single agent, prolong the action time, and inhibit the regeneration of water hyacinth.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a herbicide composition for effectively killing water hyacinth comprising flumioxazolidinone, pendimethalin and metolachlor, wherein the mass ratio of flumioxazolidinone, pendimethalin and metolachlor is 0.75-25:0.2-200:0.3-300, and the dosage of the active ingredient is between 0.75mg / L-525mg / L. After flumioxazolidinone, pendimethalin and metolachlor are applied to water hyacinth, the present invention can effectively inhibit the generation of new leaves, promote the withering and corruption of leaves, inhibit the generation of new roots and the resurrection of plants, and has a significant inhibitory effect. After the corrupted water hyacinth enters the silt at the bottom of the water body, it can be used as a nutrient for the growth of various aquatic organisms, achieving the effect of resource recycling. The pharmaceutical composition of the present invention can effectively prevent and control the rebirth and resurrection of leaves and roots of water hyacinth, promote the corruption of water hyacinth, is particularly suitable for the growth control of water hyacinth, realizes the killing of water hyacinth, and provides theoretical support for the prevention and control of water hyacinth.

[0019] The fluazifop-butyl·pendimethalin·S-metolachlor emulsifiable concentrate of the present invention is sensitive to the root system of water hyacinth. After application of the medicine, the leaves and petioles wither 5 days after application, the leaves completely die and fall down 20 days after application, the roots of the water hyacinth do not sink after death and lodging, the roots are basically dead 10 days after application, the roots are completely dead 15 days after application, all the roots are decomposed after 40 days after application, the root heads are completely decomposed after 60 days after application, and there is no regeneration afterwards, which indicates that the new root inhibition rate reaches 100% within two months, and a large number of new roots sprout in the water hyacinth of the control group every time the water hyacinth is checked, and the killing effect is more stable and efficient than that of the single agent treatment, and the lasting effect is long. Compared with the single agent treatment, the fluazifop-butyl·pendimethalin·S-metolachlor emulsifiable concentrate has significantly enhanced inhibitory effect on new roots and new leaves, can effectively decompose water hyacinth, solves the problem of easy division and difficulty in killing water hyacinth from the root, and provides theoretical technology and experimental basis for the prevention and control of water hyacinth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The number of new leaves of water hyacinth 5 days after application;

[0021] Figure 2 The number of new leaves of water hyacinth 10 days after application;

[0022] Figure 3 The number of new leaves of water hyacinth 15 days after application;

[0023] Figure 4 The number of new leaves of water hyacinth 20 days after application;

[0024] Figure 5 The number of new leaves of water hyacinth 40 days after application;

[0025] Figure 6 It is the number of new leaves of water hyacinth 60 days after application of pesticide. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the embodiments, but the protection scope of the present invention is not limited thereto.

[0027] 1. Test methods and materials

[0028] 1 Test materials

[0029] The test base for testing water hyacinth is located in Tonghu area of ​​Huicheng District, Huizhou City.

[0030] Spraying time: mid-June, warm weather.

[0031] Number of spraying: once.

[0032] Spraying area: Water hyacinth leaves.

[0033] The plot area was set at 20 square meters, with three replicates for each treatment. Each plot was sprayed evenly, and three blank control areas (with S-150 as the blank treatment) were set up, located at both ends and the middle of the river bank, and isolated by protective nets (the test data of the blank control area was the average value of the three blank control data).

[0034] 2 Experimental drugs

[0035] S-150 was selected as the solvent to dissolve the technical materials of fluazifop, pendimethalin and s-isopropylamine, and 10% by mass of cyclohexanone was added as a cosolvent until the technical materials were completely dissolved. Then, two emulsifiers with a total mass of 15% were added (the proportion of the auxiliary agents is shown in Table 3), namely, Nongru 500# (calcium dodecylbenzene sulfonate) and NP-10 (nonylphenol polyoxyethylene ether, 10EO), and the emulsifiers were stirred to dissolve evenly to obtain a homogeneous fluazifop, pendimethalin and s-isopropylamine emulsifiable concentrate.

[0036] Table 1 Experimental drug information

[0037] Chinese name common name Dosage form and content Production Unit Fluazifop-propylbenzyl (Propylene) flumioxazin 99.2%TC Ningxia Yifan Biotechnology Co., Ltd. Pendimethalin (Pendimethalin) Pendimethalin 95%TC Shandong Binhai Hansheng Biotechnology Co., Ltd. S-Metolachlor (S-Metolachlor) s-metolachlor 96%TC Xi'an Modern Science and Technology Industry Co., Ltd.

[0038] Table 2 Comparative drug information

[0039] Chinese name Dosage form and content Production Unit Fluazifop-propylbenzyl (Propylene) 48%SC Max (Rudong) Chemical Co., Ltd. Pendimethalin (Pendimethalin) 33%EC Max (Rudong) Chemical Co., Ltd. S-Metolachlor (S-Metolachlor) 45% CS Jiangsu Mingdelida Crop Science and Technology Co., Ltd.

[0040] Table 3 Information on the content of pharmaceutical additives

[0041]

[0042] 3 Experimental design

[0043] 3.1 Field control effect of water hyacinth leaves

[0044] The growth of water hyacinth was investigated before application, and once every 5, 10, 15, 20, 40, and 60 days after application. Ten water hyacinth plants were randomly selected from the treatment group and the control group for each investigation, and the total number of leaves, number of withered and yellow leaves, total number of roots, number of withered and yellow roots, number of new roots (leaves) sprouted were counted, and the dead leaf index, killing effect, and new root inhibition rate were calculated.

[0045] 3.1 Water hyacinth root rot mesh bag experiment

[0046] To further verify whether new roots have been generated, 10 water hyacinth root heads were placed in clean mesh bags 20 days after spraying, and the bags were tied with stones and then fixed in the river water. The petioles and roots of the water hyacinths were checked for decay and germination at 40 and 60 days, with 3 bags checked each time, for a total of 2 checks.

[0047] 4 Prevention and control effect indicators

[0048] Dead leaf index = Σ[number of dead leaves at each level × relative level value] / [total number of leaves surveyed × total level] × 100.

[0049] Leaf killing effect (%) = [leaf dead index of treatment area - leaf dead index of control area] / [100 - leaf dead index of control area]×100.

[0050] New root inhibition rate (%) = (number of new roots in the control area - number of new roots in the treatment area) / (number of new roots in the control area) × 100.

[0051] in:

[0052] Dead leaf effect classification standard:

[0053] Level 0: all green;

[0054] Level 1: Green rate ≥ 80%;

[0055] Level 2: 60% ≤ green rate ≤ 79%;

[0056] Level 3: 40% ≤ green rate ≤ 59%;

[0057] Level 4: 20% ≤ green rate ≤ 39%;

[0058] Level 5: Green rate ≤ 19%.

[0059] Root inhibition effect classification standard:

[0060] Grade 0: normal growth;

[0061] Level 1: inhibition rate ≤ 30%;

[0062] Level 2: 31%≤inhibition rate≤60%;

[0063] Level 3: inhibition rate ≥ 61%;

[0064] Level 4: All dead.

[0065] Corruption Standard:

[0066] Grade 0: normal morphology;

[0067] Level 1: normal (complete) morphology rate ≥ 80%;

[0068] Level 2: 50% ≤ normal morphology (completeness) rate ≤ 79%;

[0069] Level 3: 20% ≤ normal morphology (completeness) rate ≤ 49%;

[0070] Level 4: 9% ≤ normal morphology (completeness) rate ≤ 19%;

[0071] Level 5: Completely corrupted.

[0072] 5 Data processing

[0073] The data were sorted by Microsoft Excel software and analyzed by SPSS26.0 software. The least significant difference (LSD) method was used for multiple comparisons of the experimental results, and the significance level was 0.05.

[0074] 6 Results Analysis

[0075] 6.1 Field control effect of pesticide application on water hyacinth leaves

[0076] The agent has a strong killing effect on water hyacinth leaves. Inspections were carried out on the 5th, 10th and 15th days after spraying, and the killing effects of the compound treatment group were 30.00-44.56%, 60.56-69.62%, and 94.51-99.75%, respectively, and no new leaves were generated after the 20th day.

[0077] 6.1.1 Effects of the pesticide on water hyacinth leaves 5 days after application

[0078] Table 4 Effects of pesticide application on water hyacinth leaves 5 days later

[0079]

[0080]

[0081] From Table 4 and Figure 1It can be seen that after the application of the pesticide, the leaves of water hyacinth withered and the petioles turned yellow within 5 days, and the killing and prevention effect of water hyacinth in the treatment group was significantly higher than that of the blank control treatment. The killing and prevention effect of fluazifop-butyl, pendimethalin and s-metolachlor showed a gradual increase in the compound ratio range of 0.75-25:0.2-200:0.3-30, and the killing and prevention effect reached the highest at 2.5:20:30, which was 41.28%; the number of new leaves in the treatment group was significantly lower than that in the blank control treatment. At 2.5:20:30, the number of new leaves was 0 and the dead leaf index was 44.56%. This shows that the compound application of fluazifop-butyl, pendimethalin and s-metolachlor is beneficial to reduce the number of new leaves, improve the killing and prevention effect, increase the dead leaf index, and increase the proportion of dead leaves at level 5.

[0082] 6.1.2 Effects on Water Hyacinth Leaves 10 Days After Application

[0083] Table 5 Effects of pesticides on water hyacinth leaves 10 days after application

[0084]

[0085]

[0086] From Table 5 and Figure 2 It can be seen that: 10 days after application, the leaf dead index of water hyacinth in the treatment group of fluazifop-butyl, pendimethalin and s-methylpropane increased. Within the ratio range of 0.75-25:0.2-200:0.3-30, the leaf dead index showed a gradually increasing trend, and at the ratio of 2.5:20:30, the leaf dead index was the highest, which was 69.62%. The killing and control effect under the same ratio was also the highest, which was 66.55%. The leaf dead effect of the combination treatment of fluazifop-butyl, pendimethalin and s-methylpropane in the treatment group was better than that of the single-agent treatment, and they were all better than the blank control treatment.

[0087] 6.1.3 Effects on water hyacinth leaves 15 days after application

[0088] Table 6 Effects of pesticides on water hyacinth leaves 15 days after application

[0089]

[0090]

[0091] From Table 6 and Figure 3It can be seen that: 15 days after the application of the pesticide, no new leaves appeared in the water hyacinth in the treatment group of flumioxazolidinone, pendimethalin and s-isopropylamine. When the pesticide ratio in the treatment group was in the range of 0.75-25:0.2-200:0.3-30, its dead leaf index showed a trend of gradual increase, and reached the highest at 2.5:20:30, which was 99.75%. The killing and prevention effect under the same ratio was also the highest, which was 99.73%. The dead leaf effect of the treatment group of flumioxazolidinone, pendimethalin and s-isopropylamine was better than that of the single-agent treatment, and they were all better than the blank control treatment.

[0092] 6.1.4 Effects on Water Hyacinth Leaves 20 Days After Application

[0093] Table 7 Effects of pesticide application on water hyacinth leaves 20 days later

[0094]

[0095]

[0096] From Table 7 and Figure 4 It can be seen that after 20 days of application, the killing and prevention effects of the combination of fluazifop-butyl, pendimethalin and S-metolachlor were all 100%, and the killing and prevention effects of the single-dose treatment group were all above 90%. No new leaves were generated in any of the treatment groups, which was more effective than the blank treatment group.

[0097] 6.1.5 Effects on Water Hyacinth Leaves 40 Days After Application

[0098] Table 8 Effects of pesticide application on water hyacinth leaves 40 days later

[0099]

[0100]

[0101] From Table 8 and Figure 5 It can be seen that: 40 days after the application of the pesticide, new leaves were generated in the single agent treatment, but no new leaves were generated in the compound agent of fluazifop-butyl, pendimethalin and S-metolachlor. The killing and prevention effects in the single agent treatment were all below 50%, while the killing and prevention effects in the compound agent treatment group remained at 100%. This shows that the compound agent of fluazifop-butyl, pendimethalin and S-metolachlor can effectively improve the effect of a single agent and prolong the action time.

[0102] 6.1.6 Effects on Water Hyacinth Leaves 60 Days After Application

[0103] Table 9 Effects of pesticide application on water hyacinth leaves 60 days later

[0104]

[0105]

[0106] From Table 9 and Figure 6 It can be seen that 60 days after application, the killing and prevention efficiency of the combination treatment group of fluazifop-butyl, pendimethalin and s-methyl metolachlor was 100%, and no new leaves were generated. New leaves were generated in all single-dose treatment groups, and no new leaves were generated in the combination treatment group. Compared with the blank treatment and single-dose treatment, the combination treatment group of fluazifop-butyl, pendimethalin and s-methyl metolachlor had significant effect.

[0107] 6.2 Effects of pesticide application on water hyacinth root system

[0108] 6.2.1 Effects on the roots of water hyacinth 5 days after application

[0109] Table 10 Effects of pesticide application on water hyacinth root system 5 days later

[0110]

[0111]

[0112] Note: Different letters in the table indicate significant differences (p<0.05), the same below.

[0113] It can be seen from Table 10 that 5 days after application, the number of new roots sprouted by water hyacinth in the combination treatment group of fluazifop, pendimethalin and s-isopropylamine was significantly lower than that in the blank control treatment, and the new root inhibition rate reached the highest level of 94.34% when the agent ratio was 2.5:20:30, which had a strong and rapid effect on the root system.

[0114] 6.2.2 Effects on the roots of water hyacinth 10 days after application

[0115] Table 11 Effects of pesticide application on water hyacinth root system 10 days later

[0116]

[0117]

[0118] It can be seen from Table 11 that 10 days after application, the number of dead roots in the combination treatment group of fluazifop-butyl, pendimethalin and s-isopropylamine was distributed at levels 3 and 4, while the root inhibition effect in the blank control was mainly distributed at level 0. Among them, in the combination treatment group of fluazifop-butyl, pendimethalin and s-isopropylamine, the new root inhibition rate of water hyacinth was the highest when the agent ratio was 2.5:20:30, reaching 100%, which was better than the new root inhibition rate of the single agent treatment, and the number of new root sprouting in the combination agent treatment was lower than that of the single agent treatment and the blank control treatment.

[0119] 6.2.3 Effects on the roots of water hyacinth 15 days after application

[0120] Table 12 Effects of pesticide application on water hyacinth root system 15 days later

[0121]

[0122]

[0123] It can be seen from Table 12 that 15 days after application, the root inhibition effect in the blank control was mainly distributed at level 0, among which the new root inhibition rate of water hyacinth in the combination treatment group of fluazifop, pendimethalin and S-isopropylamine was 100%, and no new roots sprouted, which was better than the new root inhibition rate of the single-agent treatment. New roots sprouted in the single-agent treatment, indicating that the single-agent treatment could not inhibit the formation of new roots.

[0124] 6.2.4 Effects on the roots of water hyacinth 20 days after application

[0125] Table 13 Effects of pesticide application on water hyacinth root system 20 days later

[0126]

[0127]

[0128] It can be seen from Table 13 that 20 days after the application of the combination of fluazifop-butyl, pendimethalin and s-isopropylamine, the root system partially turned black and no new roots sprouted, and the inhibitory effect on new roots of water hyacinth reached 100%. New roots sprouted in all the single-agent treatments, indicating that the application of a single agent cannot inhibit the formation of new roots, while the combination of fluazifop-butyl, pendimethalin and s-isopropylamine has a strong inhibitory effect on the root system of water hyacinth.

[0129] 6.2.5 Effects on the roots of water hyacinth 40 days after application

[0130] Table 14 Effects of pesticide application on water hyacinth root system 40 days later

[0131]

[0132]

[0133] It can be seen from Table 14 that 40 days after the application of the pesticide, the combination treatment of fluazifop, pendimethalin and s-isopropylamine had a 100% inhibitory effect on the new roots of water hyacinth, and no new roots were generated. New roots sprouted in the single-agent treatments, and the new root inhibition rate was less than 60%. The number of dead roots was mainly 0 and 1, indicating that the combination of fluazifop, pendimethalin and s-isopropylamine has a stable effect and a long lasting effect.

[0134] 6.2.6 Effects on the roots of water hyacinth 60 days after application

[0135] Table 15 Effects of pesticide application on water hyacinth root system 60 days later

[0136]

[0137]

[0138] It can be seen from Table 15 that after 60 days of application, no new roots sprouted in the root system of the compound treatment group of flumioxazin, pendimethalin and S-metolachlor, and the inhibitory effect on the new roots of water hyacinth reached 100%, while a large number of new roots sprouted in the blank control group of water hyacinth every time it was checked, and new roots also sprouted in the single agent treatment. This shows that the compound agent of flumioxazin, pendimethalin and S-metolachlor has a strong inhibitory effect on the root system of water hyacinth.

[0139] 6.3 Water hyacinth root rot experiment in mesh bag

[0140] Table 16 Effect of mesh bag rot on water hyacinth root system

[0141]

[0142]

[0143] It can be seen from Table 16 that 40 days after the application of the pesticide, all the water hyacinths in the combination treatment group of fluazifop, pendimethalin and s-isopropylamine were decomposed and sank in the water, and the decomposition level was 5. In the single-agent treatment, the decomposition level of the water hyacinth was 1. 60 days after the application of the pesticide, no new leaves of the water hyacinths in the combination treatment group of fluazifop, pendimethalin and s-isopropylamine were generated, and they were still in a decomposed state, and the decomposition level was 5. In the single-agent treatment, the decomposition level of the water hyacinth was 0, indicating that the combination of fluazifop, pendimethalin and s-isopropylamine has a more stable effect and a longer lasting effect than the single agent, and the decomposed water hyacinth can sink to the bottom of the water as sludge, providing nutrients for underwater microorganisms, thereby achieving resource recycling.

[0144] 7 Conclusion

[0145] Fluazifop-butyl·Pendimethoate·Isopropylamine EC is sensitive to the roots of water hyacinth. The leaves of water hyacinth withered 5 days after application, and completely died and fell over 20 days later. The roots of water hyacinth did not sink after death and lodging. The roots were basically dead after 10 days, and all roots died after 15 days. After 40 days, all of them were decomposed, and after 60 days, all the root heads were decomposed, and there was no regeneration afterwards. However, a large number of new roots sprouted in the water hyacinth of the control group every time the pesticide was checked. Its killing effect is more stable and efficient than that of single-agent treatment, and the effective period is longer. Compared with the single-agent treatment of fluazifop-butyl·pendimethalin·isopropylamine emulsifiable concentrate, its inhibitory effect on new roots and leaves was significantly enhanced, and it can effectively decompose water hyacinth, solving the problem of water hyacinth being easy to divide and difficult to kill from the root. The decomposed water hyacinth can enter the bottom of the riverbed and become silt, providing nutrients for various organisms on the riverbed and recycling resources, providing a theoretical technology and experimental basis for the prevention and treatment of water hyacinth.

Claims

1. A pharmaceutical composition for effectively removing water hyacinth, characterized in that: The pharmaceutical composition is mainly prepared by compounding effective ingredients of fluazifop-butyl, pendimethalin and s-metolachlor, and the mass ratio of fluazifop-butyl, pendimethalin and s-metolachlor is 0.75-25:0.2-200:0.3-300.

2. The pharmaceutical composition for effectively removing water hyacinth as claimed in claim 1, characterized in that: The mass ratio of fluazifop-butyl, pendimethalin and S-metolachlor is 0.75-25:0.2-200:0.3-30.

3. The pharmaceutical composition for effectively removing water hyacinth as claimed in claim 2, characterized in that: The mass ratio of fluazifop-butyl, pendimethalin and S-metolachlor is 2.5:20:

30.

4. The pharmaceutical composition for effectively removing water hyacinth as claimed in claim 1, characterized in that: The pharmaceutical composition is made of active ingredients and adjuvants into a dosage form allowed by pesticides, and the dosage form is wettable powder, soluble powder, water-dispersible granules, suspension, emulsifiable concentrate, water emulsion, microemulsion or microcapsule.

5. An emulsifiable concentrate composition for effectively removing water hyacinth, characterized in that: The invention is composed of the following raw materials in percentage by weight: 0.75%-52.5% of active ingredient, 5%-9% of calcium dodecylbenzene sulfonate, 6%-10% of nonylphenol polyoxyethylene ether, 10% of auxiliary solvent cyclohexanone, and the balance of solvent Solveso 150.

6. Use of the effective water hyacinth removal agent composition according to any one of claims 1 to 4 or the effective water hyacinth removal emulsifiable concentrate agent composition according to claim 5 in preventing and killing water hyacinth, characterized in that: The pharmaceutical composition is applied to water hyacinth in mid-June, which promotes the death of the above-water parts of the water hyacinth by inhibiting the germination of new leaves and promoting the withering of leaves, and inhibits the formation of the water hyacinth root system by inhibiting the germination of new roots and promoting root necrosis.

7. The use according to claim 6, characterized in that The pharmaceutical composition is prepared into a liquid with an active ingredient concentration between 0.75 mg / L and 525 mg / L, and the liquid is sprayed on the leaves of water hyacinth.

8. The use according to claim 7, characterized in that The pharmaceutical composition is prepared into a liquid with an active ingredient concentration between 0.75 mg / L and 255 mg / L, and the liquid is sprayed on the leaves of water hyacinth.

9. The use according to claim 7, characterized in that The pharmaceutical composition was prepared into a liquid with an active ingredient concentration of 52.5 mg / L, and the liquid was sprayed on the leaves of water hyacinth.

10. Use of the effective water hyacinth removal agent composition according to any one of claims 1 to 4 or the effective water hyacinth removal emulsifiable concentrate agent composition according to claim 5 in promoting the corruption of water hyacinth and preventing the regeneration of water hyacinth, characterized in that: The decomposed water hyacinth sinks to the bottom of the water and serves as fertilizer for various aquatic organisms, promoting the recycling of resources.

Images