NL2031438B1 - Synergistic decrement pesticide composition containing phenamacril and application thereof - Google Patents

Abstract

UITTREKSEL relates to a synergistic decrement pesticide composition containing phenamacril and, an application thereof. The synergistic decrement pesticide composition is characterized in that phenamacril, metconazole and trifloxystrobin are used as effective components of the pesticide composition, and the weight ratio of phenamacril to metconazole to trifloxystrobin is (1—64): (1—64): (1—64). The composition is used for controlling wheat scab, wheat powdery mildew, wheat rust, melon fusarium wilt, wheat sharp eyespot, rice blast and rice bakanae disease, and the synergistic effect is obvious.

Description

P1283 /NLpd

SYNERGISTIC DECREMENT PESTICIDE COMPOSITION CONTAINING PHENAMACRIL

AND APPLICATION THEREOF

TECHNICAL FIELD

The present disclosure belongs to the field of agricultural bactericides, and particularly relates to a synergistic decrement pesticide composition containing phenamacril and an application thereof.

BACKGROUND ART

Phenamacril, test number: JS399-19, chemical name: 2-cyano-3- amino-3-phenyl ethyl acrylate, is synthesized by Jiangsu Pesticide

Research Institute, and is a novel bactericide with national inde- pendent intellectual property right. The agent is resistant to rain erosion, has good systematic penetration and excellent pro- tection and control effects. Phenamacril has high biological ac- tivity against Fusarium graminearum, Fusarium moniliforme, Fusari- um oxysporum, etc., and is suitable for effective control of crop diseases such as wheat scab, rice bakanae disease and watermel- on fugarium wilt.

Metconazole, chemical name: 5-(4-chlorophenyl)-2,2-dimethyl- 1-(1, 2,4-triazol-1-ylmethyl) -cyclopentancl, can reduce the path- ogenicity of pathogens by inhibiting or interfering with the de- velopment of appressorium and haustorium, and the formation of hy- phae and spores, and causing membrane leakage. Metconazole is a high-efficiency, broad-spectrum, systemic triazole fungicide, which has protective, therapeutic and eradicating effects, there- fore, it is widely used in the control of a variety of diseases caused by ascomycetes, basidiomycetes and other fungi.

Trifloxystrobin, a methoxy acrylate fungicide, has protective and therapeutic effects and can be used to prevent and control rust disease, downy mildew, powdery mildew, etc.

Presently, there is a lack of disease-resistant varieties, in order to delay or overcome the formation and development of patho- gen resistance, continucus use of a single fungicide should be avoided as much as possible, and it should be used in rotation or mixed with other types of fungicides.

Existing patent CN101595890A discloses a pesticide composi- tion of phenamacril and triazoles, and discloses that phenamacril can be mixed with triazole fungicides such as triadimefon, metcon- azole, and difenoconazole; the patent CN103493818A discloses the composition of phenamacril and metconazole is used to prevent and control wheat scab, wheat powdery mildew and wheat rust, with sig- nificant effect, and the composition can be used to delay the de- velopment of resistance of pathogenic bacteria to triazole fungi- cides; the patent CN102715156A discloses the bactericidal composi- tion of phenamacril, trifloxystrobin and picoxystrobin, and other methoxyacrylates is used to prevent and control wheat take-all, gibberellic disease, rice blast, bakanae, etc. The applicant has conducted a preliminary search and found no relevant report on the mixed use of the three agents.

With the improvement of pesticide modernization, pesticides are now facing great ecological and environmental problems. Con- tinuous use of the same or similar toxic pesticides has caused in- creased resistance to pests. Farmers have to increase the amount of pesticides to control them. For a long time, it will cause a vicious circle. Due to the increasing investment and risks in the development and production of new pesticide varieties, and the long market development cycle, together with the rapid development of pest resistance, the supply of effective pesticides is becoming increasingly scarce. The use of pesticide mixtures has played an important role in delaying the resistance of pests, improving con- trol efficiency, reducing costs, extending service life, and re- ducing environmental pollution caused by pesticides, etc.

We compounded phenamacril, metconazole and trifloxystrobin on the basis of indoor screening and field tests, and found that they have obvious synergistic effects, and after further research, we completed the invention.

SUMMARY

The present disclosure aims to solve the technical problem of providing a composition which is good in bactericidal effect, low in pesticide cost and wide in bactericidal spectrum and has a re- markable synergistic effect on fungal diseases such as wheat scab and powdery mildew. In order to solve the above technical problem, the present disclosure provides the following technical solution:

A synergistic decrement pesticide composition containing phenamacril is characterized in that the pesticide composition takes phenamacril, metconazole and trifloxystrobin as effective components, wherein the weight ratio of phenamacril to metconazole to trifloxystrobin is (1-64): (1-64): (1-64), preferably (1-32): (1-32): (1-32), more preferably (1-16): (1-16): (1-16), and the content of the effective components is 1-85%, preferably 20-75%.

The composition provided by the present disclosure is used for controlling fungal diseases in a control spectrum of wheat scab, wheat powdery mildew, wheat rust, melon fusarium wilt, wheat take-all, wheat sharp eyespot, rice blast, rice bakanae disease, etc.

The composition can be prepared into preparation formulations according to a method well known by those skilled in the technical field, and the preparation formulations include water dispersible granules, wettable powder, wet seed dressing, missible oil, sus- pending agent, oil suspending agent, suspoemulsion, suspended seed coating, emulsion in water, microemulsion, etc. When the prepara- tion is prepared, known aids such as emulsifier, wetting disper- sant, suspending aid, disintegrating agent, adhesive, antifreezing agent, thickening agent, stabilizer and defoaming agent can be added into the preparation according to needs, and proper aids in the pesticide can be used in the composition.

The composition has the main obvious advantages as follows: 1. The components of the composition have no antagonistic ac- tion, and the synergistic effect is obvious. 2. The composition enlarges the bactericidal spectrum and has better bactericidal effect. 3. The composition has compound synergy, can reduce the using amount of each single agent, and has low cost and is easy to popu- larize.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present disclosure will be further described below in conjunction with embodiments. The percentages in the embodiments are all weight ratios, but the present disclosure is not limited to this. 1. Indoor activity test:

The indoor activity test method comprises the following steps: preparing phenamacril, metconazole and trifloxystrobin raw drugs into the required liquid medicine according to the set pro- portioning concentration for later use. The test method refers to “NY/T 1156.2-2006 Pesticide Indoor Biological Determination Test

Criterion-Bactericide Part 2: Plate Method for Pathogenic Fungus

Hypha Growth Inhibition Test”.

Under an aseptic condition, premelted culture mediums are quantitatively added into an aseptic conical flask, the liquid medicine is sequentially and quantitatively sucked from low con- centration to high concentration and then respectively added into the conical flask, and shaken well. Then the liquid medicine is equivalently poured into more than three culture dishes with the diameter of 9 cm to prepare a medicine-containing flat plate with corresponding concentration. The treatment without containing any medicine is used as a blank control. The operation is repeated four times.

A bacterium dish is punched from the edge of a bacterial col- ony of cultured pathogenic bacteria by using a puncher with the diameter of 5 mm under the aseptic condition, the bacterium dish is inoculated to the center of a pesticide-containing flat plate by using an inoculating needle and cultured for 4 days at the tem- perature of 25 °C, the diameter of the bacterial colony is measured by using a cross method, the effective medium doses (EC50 values) of different treatment inhibition bacteria for 50% of growth are calculated according to the following formula, and the bacterio- static activity is compared.

The synergistic effect of the bactericidal composition con- taining phenamacril, metconazole and trifloxystrobin on wheat scab and rice bakanae disease by adopting a mycelium growth inhibition method is evaluated by adopting a cotoxicity coefficient method,

the synergistic effect on wheat powdery mildew is measured by adopting an indoor pot live test, a regression equation is solved by using logarithm and control efficiency number values of the concentration of the pesticide, the EC50 value of the pesticide 5 pair is calculated, and then the cotoxicity coefficient is solved.

The combined effect of the composite pesticide on wheat scab, pow- dery mildew and rice bakanae disease is evaluated by using the co- toxicity coefficient, that the cotoxicity coefficient is greater than 120 represents the synergistic effect, when the cotoxicity coefficient is between 80 and 120, it represents an additive ef- fect, and when the cotoxicity coefficient is less than 80, it rep- resents an antagonistic effect.

Table 1 Test results of combined effects of compositions with different proportions on wheat scab

Medicine Ratio EGso (mg/L) Cotoxicity co-

OI lan en ewe en [= em =

Tri- 0.82 ee

Phenamac- cd: 1: 64 0.18 128.5 rilsMetconazol e*Trifloxystro bin

Phenamac- 8: 1: 8 0.13 145.31 rilsMetconazol e*Trifloxystro bin

Phenamac- le: 8: 1 142.44 rilsMetconazol esTrifloxystro bin

Phenamac- 1: 1: 1 0.05 167.14 rileMetconazol e*Trifloxystro bin

Phenamac- 2: 4: 1 0.05 132.24 rilsMetconazol e*Trifloxystro bin

Phenamac- l: 8: 2 0.04 140.24 rileMetconazol e*Trifloxystro bin

Phenamac- 1: 64: 16 0.03 142.33 rileMetconazol e*Trifloxystro bin

Table 2 Test results of combined effects of compositions with different proportions on wheat powdery mildew

Medicine ~~ [Ratio [EC50 (mg/L) Cotozicity co- efficient

Phenamacril ~~ +— 35.24 —

Metconazole ~~ +— {1.04 —

Trifloxystrobin ~~ +— 3.81 —

Phenamac- ~~ |64:1:64 {5.41 Q121.76 rilsMetconazolesTrifl oxystrobin

Phenamac- 8:1:8 3.62 142.91 rilsMetconazolesTrifl oxystrobin

Phenamac- 16:8:1 2.16 137. 47 rilsMetconazolesTrifl oxystrobin

Phenamac- ~~ {:1:1 {1.3 147.34 rilsMetconazolesTrifl oxystrobin

Phenamac- 2:4:1 1.34 125.53 rilsMetconazolesTrifl oxystrobin

Phenamac- 1:8:2 0.90 147.57 ee oxystrobin

Phenamac- ~~ |l:64:16 0.95 129.54 rilsMetconazolesTrifl oxystrobin

Table 3 Test results of combined effects of compositions with different proportions on rice bakanae disease

Medicine ~~ [Ratio [EC50 (mg/L) Cotoxicity co- efficient

Phenamacril a 16 — repo een ea

Phenamac- 64:1:64 5.41 127.54 rilsMetconazolesTrifl oxystrobin

Phenamac- ~~ 8:1:8 2.62 163.13 rileMetconazolesTrifl oxystrobin

Phenamac- OO {16:8:1 2.16 140.87 rilsMetconazolesTrifl oxystrobin

The test results in Tables 1-3 show that, when the combina- tion of phenamacril, metconazole and trifloxystrobin is in the range of (1-64): (1-64): (1-64), it has obvious synergistic effect on wheat scab, powdery mildew and rice bakanae, and the effect is obviously better than that of single preparation in single test. 2. Preparation embodiment

The present disclosure will be further explained below in conjunction with the embodiments. The percentages in the embodi- ments are all weight ratios, but the present disclosure is not limited to this. The processing techniques of various dosage forms of the composition of the present disclosure are all prior art, and there may be some changes according to different situations.

Example 1. Suspending agent containing phenamacril, metcona- zole and trifloxystrobin

Component Examplel Control 1 Control 2 [Control 3

Phenamacril I h-

Metconazole 10 15 15

Trifloxystrobin 10 + hs hs

Alkylphenol ethoz- 13 ~~ {p14 je ps ylates

Calcium lignosul- 6 BA fonate

Sodi- a4 ela a um lauryl sulfate

Sodium carboxymethyl |2 2 2 2 saf FT

Example 2. Wettable powder containing 44% of phenamacril, metconazole and trifloxystrobin 4% of phenamacril, 32% of metconazole, 8% of trifloxystrobin, 12% of fatty alcohol-polyoxyethylene ether, 5% of calcium ligno- sulphonate, 11% of lauryl sodium sulfate, 2% of diatomite, 0.5% of glycerol and the balance kaolin, wherein the sum was 100%. The wettable powder containing 44% of phenamacril, metconazole and trifloxystrobin is prepared according to a conventional prepara- tion method.

Example 3. Water dispersible granules containing 28% of phen- amacril, metconazole and trifloxystrobin 8% of phenamacril, 16% of metconazole, 4% of trifloxystrobin, 6% of polycarboxylate, 7% of alkyl naphthalene sulfonate formalde- hyde condensate, ێ% of tea seed cake, 3% of calcium dodecyl ben- zene sulfonate, 2% of white carbon black and the balance diatomite are weighed, wherein the sum of the raw materials is 100%. The raw materials are prepared into the water dispersible granules con- taining 28% of phenamacril, metconazole and trifloxystrobin by a conventional method for preparing water dispersible granules, namely the steps of mixing, ultramicro airflow crushing, mixing and granulating.

Example 4. Emulsion in water containing 34% of phenamacril, metconazole and trifloxystrobin 16% of phenamacril, 2% of metconazole, 16% of tri- floxystrobin, 8% of sodium methylene bis-naphthalene sulfonate, 6%

of alkylphenol ethoxylates, 10% of tea saponin, 0.5% of glycerol, 1% of xanthan gum and the balance water, wherein the sum of the raw materials isl00%. The emulsion in water containing 34% of phenamacril, metconazole and trifloxystrobin is prepared according to a conventional preparation method.

Example 5. Missible oil containing 25% of phenamacril, metconazole and trifloxystrobin 16% of phenamacril, 8% of metconazole, 1% of trifloxystrobin, 6% of calcium dodecyl benzene sulfonate, 5% of fatty alcohol- polyoxyethylene ether, 5% of polyoxyethylene alkylphenol formalde- hyde condensate, 7% of oleic acid and the balance N-methyl pyrrol- idone are uniformly mixed to obtain the missible oil containing 25% of phenamacril, metconazole and trifloxystrobin, wherein the sum of the raw materials is 100%. 3. Field efficacy test

Pesticide for test: preparations in examples 1 to 5 and com- parative examples 1 to 3.

Contrast pesticide: 25% of phenamacril suspending agent (Control 1), 60% of metconazole wettable powder (Control 2); 25% of trifloxystrobin missible oil (Control 3).

Protected crops: wheat.

Prevented and controlled objects: wheat scab and wheat pow- dery mildew. 1. Wheat scab test method: the test is carried out in a wheat field, three replicates are established for each group, and the treatment area is about 50 m’; various pesticides are accurately weighed according to the area of a test plot, and the pesticides are applied for the first time at the initial stage of flowering of wheat, and applied for the second time after 3 to 5 days; and disease condition investigation is carried out after 20 days, and the activities of the pesticides are compared. The result is shown in Table 4.

Table 4 Results of field pesticide effect test of composition on wheat scab.

Treatment Amount Control effect Control effect (ga.i/mu) after the last after the last time of pesti- time of pesti- cide applica- cide applica- tion for 7 tion for 15 days (%) days (%)

Comparative 20 71.02 84.32

Comparative 20 70.42 83.15

El A A

Comparative 20 72.47 81.54

Er A A A ae 2. Powdery mildew test method: various pesticides are accu- rately weighed according to the area (about 30 mè) of the test plot; the pesticides are diluted with water and applied once at the initial stage of disease condition by using a knapsack sprayer and then applied once after 7 days, and the pesticides are applied twice in total; and disease condition indexes are investigated and the control effect is calculated respectively after the last time of pesticide application for 7 days and 14 days. The result is shown in Table 5.

Table 5 Results of field pesticide effect test of composition on wheat powdery mildew

Treatment Amount Control effect Control effect (ga.i/mu) after the last after the last time of pesti- time of pesti- cide applica- cide applica- tion for 7 tion for 15

TTT

The field test results show that the compound of phenamacril, metconazole and trifloxystrobin has good control effect on wheat scab and wheat powdery mildew; and compared with the comparative examples, the activity is greatly improved, and the synergistic effect is obvious. According to field visual inspection, crops grow normally in the test dosage range, and no phytotoxicity or abnormal phenomenon is produced on plants, so the composition is safe to wheat.

The above descriptions are merely the preferred embodiments of the present disclosure. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principle of the present disclosure, and these improvements and modifications shall also fall within the scope of protection of the present disclosure.

Claims (6)

CONCLUSIONS A synergistic decreasing pesticide composition containing fenamacril comprising effective ingredients of fenamacril, metconazole and trifloxystrobin, wherein the weight ratio of fenamacril to metconazole to trifloxystrobin is in the range of (1 to 64): (1 to 64): (1 to 64). A composition according to claim 1, wherein the weight ratio of fenamacril to metconazole to trifloxystrobin is in the range of (1 to 32): (1 to 32): (1 to 32) and further preferably {1 to 16): (1 to 16): (1 to 16). 3. Composition according to claim 1 or 2, wherein the content of fenamacril, metconazole and trifloxystrobin in the composition is 1 to 85%, and preferably 20 to 75%. A compound bactericide comprising the composition according to any one of claims 1 to 3 and any of the dosage forms permitted by conventional auxiliaries on pesticide preparations in the aspect of pesticide preparation. A bactericide according to claim 4, wherein the dosage forms comprise water-dispersible granules, wettable powder, oil to be mixed, water-suspendable agents, oil-suspendable agents, suspoemulsion, aqueous emulsion and microemulsion - at. Use of the composition according to claims 1 to 3 or the bactericide according to claims 4 to 5 in the prevention and treatment of wheat scab, powdery mildew of wheat, wheat rust, melon fusarium wilt, wheat stem killer, wheat sharp eyespot, rice mold, rice bakanae disease and other fungal diseases .