CN111758736A - Rice seed treating agent containing prothioconazole, imazalil and cartap and application thereof - Google Patents
Rice seed treating agent containing prothioconazole, imazalil and cartap and application thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/647—Triazoles; Hydrogenated triazoles
- A01N43/653—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/50—1,3-Diazoles; Hydrogenated 1,3-diazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/12—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring
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Abstract
The invention discloses a rice seed treating agent containing prothioconazole, imazalil and cartap and application thereof, wherein the rice seed treating agent comprises effective components of prothioconazole, imazalil and cartap, and the mass ratio of prothioconazole, imazalil and cartap with insecticidal activity is 1-15: 1-15. The invention also discloses application of the seed treating agent in preventing and treating the bakanae disease of rice or/and the rice seedling rot or/and the rice aphelenchoides besseyi. The seed treatment agent can effectively treat the drug resistance of the fusarium granatum to bactericides such as carbendazim, prochloraz, phenamacril and the like, and simultaneously reduces the potential drug resistance risk of the fusarium granatum to prothioconazole and imazalil respectively. After the prothioconazole, the imazalil and the cartap are combined, a brand new product is developed, the effect on preventing and treating the rice bakanae disease, the rice seedling rot and the rice aphelenchoides besseyi disease is obvious, the synergy is obvious, the pesticide consumption can be reduced, and the environment-friendly and safe effects are realized.
Description
Technical Field
The invention relates to prevention and treatment of rice seed-borne diseases, in particular to a rice seed treating agent containing prothioconazole, imazalil and cartap and application thereof.
Background
Rice bakanae disease, which is mainly caused by Fusarium fujikuroi (with the sexual status of Gibberella fujikuroi), is one of the most serious and old seed-borne diseases that endanger rice. Since the first report in japan in 1828, the disease occurs in almost all rice growing areas of the world, resulting in a loss of yield of about 3.0% to 95.4%. In addition, toxic metabolites such as fumonisins produced by fusarium granatum also pose serious food safety problems. For a long time, the prevention and treatment of rice bakanae disease mainly relies on chemical agents to carry out seed treatment. By 5 months in 2020, 158 preparations (including single preparations and compound preparations) are registered for preventing and treating the rice bakanae disease in China, wherein more than 80 percent of the effective components of the preparations are prochloraz, carbendazim or fludioxonil, and the preparations are mostly single preparations of the prochloraz or the fludioxonil. Relevant researches show that in part of China, fusarium granatum has drug resistance to both carbendazim and prochloraz, and the resistant population to the cyantraniliprole is rapidly expanded. The continuous single use of carbendazim or prochloraz in the production has lost significance in preventing and treating rice bakanae disease. In recent years, with the large amount and wide application of fludioxonil, especially single application, the problem of drug resistance of field Fusarium granatum to the drug is not ignored. Therefore, the current situation of effective prevention and control of rice bakanae disease and treatment of drug resistance is severe.
The rice seedling rot is a general term for seed rot, bud rot and seedling death of seeds, buds and seedlings in a seedling bed, and can be divided into two major categories, namely physiological category and infectious category, which occur in rice regions throughout the country. Infectious rot seedlings are mainly caused by Pythium species (Achlya spp.), Pythium species (Pythium spp.) and Fusarium species (Fusarium spp.). Low-temperature oxygen deficiency is easy to cause diseases in production, and the diseases are favorable under the conditions of cold flow, low-temperature overcast and rainy days, seedling bed water depth, non-decomposed organic fertilizers and the like.
Aphelenchoides besseyi disease (white tip) caused by Aphelenchoides besseyi, also known as Aphelenchoides besseyi Christie, can cause the characteristic albinism of rice leaf tips, followed by necrosis, flag leaf curling deformation, and inflorescence enclosing. The inflorescence becomes small, the grain is reduced, the thousand grain weight is reduced, and the rice production is seriously damaged in repeated years. At present, the common method for preventing rice aphelenchoides besseyi disease is to soak seeds with cartap before sowing.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems of rice seed-borne diseases, particularly prevention and treatment of bakanae disease of rice, the invention provides a rice seed treating agent containing prothioconazole, imazalil and cartap, wherein the prothioconazole, the imazalil and the cartap with insecticidal activity are compounded, so that a brand new product is developed, double effects of sterilization and disinsection can be exerted, the sterilization effect and the disinsection effect are obvious in synergy, the bakanae disease of rice or/and rice seedling rot or/and rice aphelenchoides besseyi disease can be effectively prevented and treated, the using amount of pesticides is reduced, and the rice seed treating agent is environment-friendly and safe; the invention also aims to provide the application of the rice seed treating agent in preventing and treating rice bakanae disease or/and rice seedling rot or/and rice aphelenchoides besseyi disease.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rice seed treating agent comprises effective components, wherein the effective components comprise prothioconazole, imazalil and cartap, and the mass ratio of the prothioconazole, the imazalil and the cartap with insecticidal activity is 1-15: 1-15.
Prothioconazole (prothioconazole) is a novel broad-spectrum triazolethione bactericide, has low toxicity, no teratogenicity or mutation type, no toxicity to embryos and safety to people and environment. Compared with triazole bactericides, prothioconazole has broader-spectrum bactericidal activity, and meanwhile, the prothioconazole has no cross resistance with bactericides such as carbendazim, prochloraz, phenamacril and the like.
Imazalil is a low-toxicity broad-spectrum bactericide, and can destroy the cell membrane of pathogenic fungi by influencing the permeability, physiological function and lipid anabolism of the cell membrane of the pathogenic fungi, so that the pathogenic fungi cannot proliferate normally, the normal life of the pathogenic fungi is influenced, and the bactericidal effect is achieved. Imazalil has strong systemic property and conductivity, and has no cross resistance with bactericides such as carbendazim, prochloraz and phenamacril.
Cartap is a nereistoxin insecticide, has stomach poisoning, contact killing and systemic effects, and also has ovicidal effect. Quick effect on pests, long residual action period and broad spectrum. Since the 90 s of the 20 th century, cartap has been the leading agent for controlling aphelenchoides besseyi disease by seed soaking.
Preferably, the mass ratio of the prothioconazole, the imazalil and the cartap is 1-2: 1-5 or 1:1: 15; further preferably, the mass ratio of the prothioconazole, the imazalil and the cartap is 1: 1-2: 3.
Preferably, the rice seed treatment agent further comprises an auxiliary agent.
The percentage content of the effective component in the pesticide composition is 10-40%, preferably 10-24%.
Preferably, the formulation of the rice seed treatment agent is wettable powder or seed treatment dispersible powder.
In some embodiments, for wettable powder, the adjuvant is selected from one or more of fillers, dispersants, wetting agents, penetrants, and stabilizers; for the seed treatment dispersible powder, the auxiliary agent is selected from one or more of a filler, a dispersing agent, a wetting agent, a penetrating agent, a film forming agent and a stabilizing agent.
Preferably, in some embodiments, for wettable powders, the dispersant is selected from sodium lignosulfonate, the wetting agent is selected from nekal, the penetrating agent is selected from penetrant T, the stabilizer is selected from ethylene glycol and calcium carbonate, and the filler is selected from kaolin.
Preferably, in some embodiments, for the seed treatment dispersible powder, the dispersing agent is selected from polyvinyl alcohol, the wetting agent is selected from sodium lauryl sulfate, the penetrating agent is selected from fatty alcohol-polyoxyethylene ether, the film forming agent is selected from xanthan gum, the stabilizing agent is selected from polyvinyl alcohol and calcium carbonate, and the filler is selected from diatomaceous earth.
In some embodiments, the wettable powder comprises, by mass percent: 1 to 30 percent of prothioconazole, 1 to 22.5 percent of imazalil, 1.5 to 17 percent of cartap, 5 to 6 percent of dispersant, 5 to 6 percent of wetting agent, 0.2 to 0.5 percent of penetrant, 0.5 to 1 percent of stabilizer and 100 percent of filler; preferably, the wettable powder comprises: 4 to 5 percent of prothioconazole, 8 to 10 percent of imazalil, 10 to 12 percent of cartap, 5 to 6 percent of dispersant, 5 to 6 percent of wetting agent, 0.2 to 0.3 percent of penetrating agent, 0.5 to 0.7 percent of stabilizer and 100 percent of filler; or, the wettable powder comprises: 1-2% of prothioconazole, 1-2% of imazalil, 15-17% of cartap, 5-6% of dispersing agent, 5-6% of wetting agent, 0.2-0.3% of penetrating agent, 0.5-0.7% of stabilizing agent and 100% of filler;
in some embodiments, the seed treatment dispersible powder comprises, in mass percent: 2 to 6 percent of prothioconazole, 2 to 6 percent of imazalil, 3 to 10 percent of cartap, 5 to 7 percent of dispersant, 5 to 7 percent of wetting agent, 0.2 to 0.5 percent of penetrant, 1 to 2 percent of film-forming agent, 0.5 to 1 percent of stabilizer and 100 percent of filler; preferably, said seed treatment dispersible powder comprises: 2.5-3% of prothioconazole, 2.5-3% of imazalil, 5-9% of cartap, 5-6% of dispersing agent, 5-6% of wetting agent, 0.3-0.5% of penetrating agent, 1.5-2% of film forming agent, 0.8-1% of stabilizing agent and 100% of filler.
The invention also provides application of the rice seed treating agent in preventing and treating bakanae disease of rice or/and aphelenchoides besseyi disease of rice.
The invention also provides application of the rice seed treating agent in preventing and treating rice seedling rot.
The application comprises the following steps: diluting the rice seed treating agent and soaking seeds.
Preferably, the rice seed treating agent is diluted by water by 500-4000 times, 800-2000 times, 800-1500 times or 1000-2000 times and then soaked in the seed.
After dilution, the concentration of the active ingredient is 30-200. mu.g/mL, 40-150. mu.g/mL, 50-160. mu.g/mL, 40-120. mu.g/mL or 40-160. mu.g/mL.
The seed soaking time is 24-48 h, and further 36-48 h.
The rice variety is Wuyujing No. 24. Has the advantages that: compared with the prior art, the rice seed treating agent containing prothioconazole, imazalil and cartap has the following advantages:
(1) enlarging the prevention and treatment objects and reducing the pesticide and improving the effect: prothioconazole and imazalil have a killing effect on fungi, but not on nematodes; cartap has a high killing effect on aphelenchoides besseyi, but basically has no control effect on bakanae disease of rice or/and rice seedling rot. The rice seed treatment agent containing prothioconazole, imazalil and cartap can simultaneously prevent and treat rice seed-borne fungal diseases (such as rice bakanae disease or/and rice seedling rot) and aphelenchoides besseyi, has obvious synergistic effect of sterilization effect and insecticidal effect, can reduce the using amount of pesticides, and is environment-friendly and safe.
(2) The generation and the development of drug resistance are delayed: the pesticide combination provided by the invention is compounded by prothioconazole, imazalil and cartap, can effectively treat the drug resistance of fusarium granatum to carbendazim, prochloraz, phenamacril and other medicaments, can be used alternately with various conventional medicaments, and delays the development and spread of the drug resistance of the fusarium granatum to the conventional medicaments; meanwhile, the potential drug resistance of fusarium granatum to prothioconazole and imazalil is reduced, the service life of the medicament is prolonged, and the method has important significance for comprehensive treatment of diseases.
(3) The product is novel and has great popularization and application values: at present, the varieties of bactericides for effectively preventing and treating the rice bakanae disease or/and the rice seedling rot are not many, triazole bactericides are common bactericides, prothioconazole has broader-spectrum bactericidal activity compared with other triazole bactericides, and prothioconazole is not registered at present and is used as a medicament for preventing and treating the rice bakanae disease or/and the rice seedling rot; imazalil is a low-toxicity broad-spectrum bactericide and can be used as a seed treatment agent, but the current imazalil is rarely reported in the aspects of preventing and treating rice bakanae disease or/and rice seedling rot and no imazalil is registered as a medicament for preventing and treating the rice bakanae disease or/and the rice seedling rot; the pesticide can be used for preventing and treating aphelenchoides besseyi disease, and cartap seed soaking for preventing and treating the aphelenchoides besseyi disease has no substitution. The three are reasonably compounded to develop a brand new product, can effectively solve the problems in the prevention and control of rice seed-borne diseases, reduce the pesticide and improve the efficiency, and has great popularization and application values.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
Bioassay example 1: indoor activity assay test.
The single agent and the ternary compound agent of the prothioconazole, the imazalil and the cartap have the bacteriostatic activity on fusarium granatum:
(1) test strains: fusarium fujikuroi is isolated, identified and stored by plant protection research institute of agricultural science research institute in Zhenjiang city in Jiangsu hilly region for use, and other Fusarium fujikuroi strains can also be used. The strain was stored on Potato Sucrose Agar (PSA) slants (4 ℃).
(2) Reagent to be tested: 95.2% (W/W) prothioconazole original drug, Shandong Hailier chemical Co., Ltd; 97% (W/W) imazalil technical, one Sail Biotech group Limited; 98% (W/W) cartap technical, even from Hongkong, Living crop science and technology Limited.
(3) The test method comprises the following steps: according to the experimental criteria NY/T1156.2-2006 for biological determination of pesticide, the indoor toxicity of a single reagent and ternary compounded agents with different proportions for the test reagent on Fusarium celosicum is determined by adopting a hypha growth rate method.
(4) And (3) data analysis: adopting DPS13.0 professional version data processing system to calculate regression equation and EC of single agent and ternary compounding agents with different proportions for inhibiting growth of Fusarium graminearum hyphae50And its 95% confidence limit.
The synergy coefficient (SR) was calculated according to the Wadley method. Evaluation of the type of combined action of a mixture of agents according to the potentiating factor (SR), i.e. SR<0.5 is antagonistic action, 0.5-1.5 is additive action, SR is>1.5 is synergistic effect. SR ═ EC50(Eth)/EC50(Eob)，EC50(Eth)＝(a+b+c)/[(a/EC50A)+(b/EC50B)+(c/EC50C)]. Wherein A, B, C is single agent, a, b, c are the proportion of the single agent in the mixture, EC50(Eth) as a mixture EC50Theoretical value, EC50(Eob) is EC50The measured value.
(5) Results and analysis:
TABLE 1 determination results of prothioconazole, imazalil, cartap and their mixture on Fusarium gambosum bioactivity (toxicity)
In the table, the prohibitane, namely the mass ratio of prothioconazole, imazalil and cartap.
Indoor determination results show that the EC of prothioconazole, imazalil and cartap for inhibiting the growth of fusarium granatum hyphae50The values were 0.0380, 0.0920 and 1204.4559. mu.g/mL, respectively. The prothioconazole, the imazalil and the cartap are compounded in a ternary manner, the mass ratio is 1-15: 1-15, the synergistic coefficient of the compounded agent for inhibiting fusarium granatum is 0.7110-1.9542, and the compounded agent has additive or synergistic effect; when the mass ratio is 1-2: 1-5, the synergistic coefficients of the compound agent for inhibiting fusarium granatum are all larger than 1.5, and the compound agent has a synergistic effect (table 1). The characteristics of all medicaments and the results of indoor proportioning screening are integrated, and the optimal mass ratio of the ternary combination of the prothioconazole, the imazalil and the cartap is preliminarily determined to be 1-2: 1-5.
Preparation example 1: preparation of 17% prothioconazole imazalil cartap WP.
The wettable powder comprises the following components in percentage by mass: 1% of prothioconazole, 1% of imazalil, 15% of cartap, 5% of sodium lignosulfonate (dispersant), 5% of nekal (wetting agent), 0.3% of penetrant T (penetrant), 0.2% of glycol (stabilizer), 0.5% of calcium carbonate (stabilizer) and kaolin (filler) which complement 100%.
The preparation method comprises the following steps:
the materials are prepared according to the proportion and the 17 percent prothioconazole, imazalil and cartap WP is prepared by a conventional wettable powder processing and preparation method.
Preparation example 2: preparation of 34% prothioconazole imazalil cartap WP.
The wettable powder comprises the following components in percentage by mass: 30% of prothioconazole, 2% of imazalil, 2% of cartap, 6% of sodium lignosulfonate (dispersant), 6% of nekal (wetting agent), 0.5% of penetrant T (penetrant), 0.3% of ethylene glycol (stabilizer), 0.5% of calcium carbonate (stabilizer) and kaolin (filler) which complement 100%.
The preparation method comprises the following steps:
the materials are prepared according to the proportion and the 34 percent prothioconazole, imazalil and cartap WP is prepared by a conventional wettable powder processing and preparation method.
Preparation example 3: preparation of 25.5% prothioconazole imazalil cartap WP.
The wettable powder comprises the following components in percentage by mass: 1.5% prothioconazole, 22.5% imazalil, 1.5% cartap, 5% sodium lignosulfonate (dispersant), 5% nekal (wetting agent), 0.3% penetrant T (penetrant), 0.2% glycol (stabilizer), 0.5% calcium carbonate (stabilizer), and kaolin (filler) to make up 100%.
The preparation method comprises the following steps:
the materials are prepared according to the proportion and the 25.5 percent prothioconazole, imazalil and cartap WP is prepared by a conventional wettable powder processing and preparation method.
Preparation example 4: preparation of 24% prothioconazole imazalil cartap WP.
The wettable powder comprises the following components in percentage by mass: 4% of prothioconazole, 8% of imazalil, 12% of cartap, 5% of sodium lignosulfonate (dispersant), 5% of nekal (wetting agent), 0.3% of penetrant T (penetrant), 0.2% of ethylene glycol (stabilizer), 0.5% of calcium carbonate (stabilizer) and kaolin (filler) which complement 100%.
The preparation method comprises the following steps:
the materials are prepared according to the proportion and the 24 percent prothioconazole, imazalil and cartap WP is prepared by a conventional wettable powder processing and preparation method.
Preparation example 5: preparation of 10% prothioconazole imazalil cartap ZF.
The dispersible powder for seed treatment comprises the following components in percentage by mass: 2.5% prothioconazole, 2.5% imazalil, 5% cartap, 5% sodium dodecyl sulfate (wetting agent), 5% polyvinyl alcohol (dispersant), 0.5% fatty alcohol-polyoxyethylene ether (penetrant), 2% xanthan gum (film-forming agent), 0.5% polyvinyl alcohol (stabilizer), 0.5% calcium carbonate (stabilizer), and diatomaceous earth (filler) to make up 100%.
The preparation method comprises the following steps:
the materials are prepared according to the proportion and the dispersible powder processing preparation method is adopted through conventional seed treatment, and 10% prothioconazole, imazalil and cartap ZF is prepared.
Preparation example 6: preparation of 15% prothioconazole imazalil cartap ZF.
The dispersible powder for seed treatment comprises the following components in percentage by mass: 3% of prothioconazole, 3% of imazalil, 9% of cartap, 6% of sodium dodecyl sulfate (wetting agent), 6% of polyvinyl alcohol (dispersing agent), 0.5% of fatty alcohol-polyoxyethylene ether (penetrating agent), 2% of xanthan gum (film forming agent), 0.5% of polyvinyl alcohol (stabilizing agent), 0.5% of calcium carbonate (stabilizing agent) and diatomite (filler) which are added to 100%.
The preparation method comprises the following steps:
the materials are prepared according to the proportion and the 15 percent prothioconazole, imazalil and cartap ZF is prepared by a conventional seed treatment dispersible powder processing preparation method.
Field efficacy example 1: the field efficacy test of the rice seed treating agent containing prothioconazole, imazalil and cartap on the bakanae disease, seedling rot and aphrodisiac disease of rice.
The rice seed treatment agents of preparation examples 1 to 6 containing prothioconazole, imazalil and cartap were prepared by respectively comparing a binary compounded agent with 10% prothioconazole cartap ZF (prepared by preparing a raw material of prothioconazole and cartap in a ratio of 1:1 according to the method for preparing the seed treatment dispersible powder of example 5) and 10% imazalil cartap ZF (prepared by preparing a raw material of imazalil and cartap in a ratio of 1:1 according to the method for preparing the seed treatment dispersible powder of example 5), and field efficacy tests for preventing rice bakanae disease, seedling rot and dry tip disease were conducted by using 20% imazalil EW (one sail biotechnology group limited), 30% prothioconazole OD (anjiuyi agriculture shares limited) and 6% cartap AS (jiangsu green shield plant protection pesticide experiments limited).
The test treatment method comprises the following steps: the test site is located in a test field in a park of agricultural science and technology innovation center of Zhenjiang agricultural science research institute in Jiangsu hilly area, the soil is horse liver soil, the fertility is medium, and the content of organic matters is about 1.80%. The rice variety is Wuyujing No. 24, and the field management is conventional during the test period. The experiment was performed with 12 treatments, which were: preparation examples 1-6, the treatment doses of the agents are respectively set AS the sum of the mass concentrations of prothioconazole and imazalil to be 50 μ g/mL (the sum of the mass concentrations of the main bactericidal active ingredients prothioconazole and imazalil to be 50 μ g/mL), and the treatment doses of 10% prothioconazole-cartap ZF, 10% imazalil-cartap ZF, 20% imazalil EW, 30% prothioconazole OD and 6% cartap AS are respectively calculated AS the mass concentrations of prothioconazole, imazalil and cartap to be 50 μ g/mL and are compared with a clear water blank. 500g of naturally occurring Wuyujing No. 24 rice seeds are respectively soaked in 1L of the above-mentioned 12 treated liquor or clear water for 48h, after soaking seeds, the germination is accelerated for about 48h to half-grain length of the bud, and the rice seeds are sowed in a seedbed of 5m x 1m, and each treatment is repeated for 3 times. When the seedlings are 30 days old, transplanting the seedlings to be treated into a field plot of 20m multiplied by 2m by a single plant with the row spacing of about 20cm multiplied by 15cm respectively, and randomly arranging the seedlings for each treatment. The management of fertilizer water and other diseases, pests and weeds in the rice growth period is conventional. And (3) investigating the bakanae disease rate and the aphelenchoides besseyi disease rate in the heading and filling stage, calculating the control effect, and performing control effect variance analysis by adopting a DPSv7.05 version data processing system and a Duncan new double-pole difference method. The calculation formulas of the disease incidence and the prevention and treatment effect are respectively as follows: disease rate is the number of diseased plants/total investigated plants x 100%; the control effect is [ (control plant disease rate-treatment plant disease rate)/control plant disease rate ] × 100%.
The test result shows that the field control effects of 11 medicament treatments on the rice bakanae disease and seedling rot disease are as follows from high to low in sequence: preparation example 5, preparation example 6, preparation example 4, preparation example 2, preparation example 1, preparation example 3, 30% prothioconazole OD, 10% prothioconazole cartap ZF, 10% imazalil cartap ZF, 20% imazalil EW and 6% cartap AS. The field control effects of the preparation examples 1-6 on rice bakanae disease are all higher than the control effects of the binary mixture of 10% prothioconazole cartap ZF and 10% imazalil cartap ZF and the control medicament of 30% prothioconazole OD, 20% imazalil EW and 6% cartap AS, and the differences are obvious (table 2). The control effect of the preparation example 1, the preparation example 6, the preparation example 5 and the preparation example 4 on the rice aphelenchoides besseyi disease is higher than that of 10 percent prothioconazole cartap ZF, 10 percent imazalil cartap ZF6 percent cartap AS and has obvious difference; because the effective dosage of the cartap with the insecticidal active ingredient is obviously lower, the control effect of the preparation examples 2-3 on the rice aphelenchoides besseyi is lower than that of 10 percent prothioconazole cartap ZF, 10 percent imazalil cartap ZF and 6 percent cartap AS, and the difference is obvious; 30% prothioconazole OD and 20% imazalil EW had essentially no control effect on rice aphelenchoides besseyi disease (Table 2).
This shows that the rice seed treatment agent containing prothioconazole, imazalil and cartap has excellent prevention effect on rice bakanae disease, seedling rot and aphrodisiac disease, can exert dual effects of sterilization and disinsection, and the sterilization effect and the disinsection effect after the compound with the optimal proportion are obvious in synergy compared with the binary compound of prothioconazole and cartap or the binary compound of imazalil and cartap and the single agent. Therefore, the rice seed treating agent disclosed by the invention has the advantages of reducing pesticide consumption, improving the effect, delaying the generation of disease resistance, and has important significance for comprehensively preventing and treating the bakanae disease, the seedling rot disease and the aphelenchoides besseyi disease of rice.
TABLE 2 field control of the agents prepared in the examples of the present invention against rice bakanae disease, rot and aphrodisiac disease
Preparation examples 1-6 treatment doses are calculated by the sum of the mass concentrations of prothioconazole and imazalil being 50 mu g/mL, and treatment doses of 30% prothioconazole OD, 10% prothioconazole and cartap ZF, 10% imazalil and cartap ZF, 20% imazalil EW and 6% cartap AS are calculated by the mass concentrations of prothioconazole, imazalil and cartap being 50 mu g/mL respectively; the data in the same column are marked with different lower case letters indicating significant differences (P < 0.05).
Field efficacy example 2: the field efficacy test of the preferred rice seed treating agent containing prothioconazole, imazalil and cartap on the bakanae disease, seedling rot and aphrodisiac disease of rice.
Preferred rice seed treatment agents containing prothioconazole, imazalil and cartap of preparation examples 4 to 6 respectively, a binary compound medicament comparison is carried out on 15 percent prothioconazole cartap ZF (the prothioconazole and cartap raw medicines are prepared by a method for preparing the seed treatment dispersible powder in the embodiment 6 according to the ratio of 2: 3) and 15 percent imazalil cartap ZF (the raw medicines of the imazalil and the cartap are prepared by a method for preparing the seed treatment dispersible powder in the embodiment 6 according to the ratio of 2: 3), and a field efficacy test for preventing and treating rice bakanae disease, seedling rot disease and aphrodisiac disease is carried out by taking 16% of prochloraz-cartap WP (prochloraz: cartap 1:3) (green shield plant protection pesticide experiment limited of Jiangsu province) and 20% of phenamacril-methyl-cartap WP (phenamacril-cartap 1:1) (green shield plant protection pesticide experiment limited of Jiangsu province) as control agents.
The test treatment method comprises the following steps: the test site is located in a test field in a park of agricultural science and technology innovation center of Zhenjiang agricultural science research institute in Jiangsu hilly area, the soil is horse liver soil, the fertility is medium, and the content of organic matters is about 1.85%. The rice variety is Wuyujing No. 24, and the field management is conventional during the test period. The experiment was carried out with 11 treatments: the 2000 and 4000 fold solutions of example 4 were prepared, the 1000 and 2000 fold solutions of example 5 were prepared, the 1000 and 2000 fold solutions of example 6 were prepared, 15% prothioconazole cartap ZF1000 fold solution, 15% imazalil cartap ZF1000 fold solution, 16% prochloraz cartap WP 500 fold solution (recommended dose), 20% phenamacril cartap WP 1000 fold solution (recommended dose) and a clear water blank control. 500g of naturally occurring Wuyujing No. 24 rice seeds are respectively soaked in 1L of the liquid medicine or clear water for 48h, after the seed soaking, the germination is accelerated for about 48h to half grain with the length of the bud, the seeds are sowed in a seedbed of 5m multiplied by 1m, and each treatment is repeated for 3 times. When the seedlings are 30 days old, transplanting the seedlings to be treated into a field plot of 20m multiplied by 2m by a single plant with the row spacing of about 20cm multiplied by 15cm respectively, and randomly arranging the seedlings for each treatment. The management of fertilizer water and other diseases, pests and weeds in the rice growth period is conventional. And (3) investigating the bakanae disease rate and the aphelenchoides besseyi disease rate in the heading and filling stage, calculating the control effect, and performing control effect variance analysis by adopting a DPSv7.05 version data processing system and a Duncan new double-pole difference method. The calculation formulas of the disease incidence and the prevention and treatment effect are respectively as follows: disease rate is the number of diseased plants/total investigated plants x 100%; the control effect is [ (control plant disease rate-treatment plant disease rate)/control plant disease rate ] × 100%.
The test result shows that the field control effects of 10 medicament treatments on the rice bakanae disease and rotten seedling disease are as follows from high to low: preparation of example 4, 2000 times liquid; preparation of example 6, 1000 fold liquid; preparation of example 5, 1000 fold liquid; preparation of example 4, 4000 fold liquid; preparation of example 6, 2000 fold liquid; preparation of example 5, 2000 fold liquid; 15% prothioconazole-cartap ZF1000 times liquid; 20% of cyantraniliprole-cartap WP 1000 times liquid; 15% imazalil cartap ZF1000 times liquid; and 16% prochloraz-cartap WP 500-fold liquid. Prepare 2000 and 4000 fold solutions of example 4; the 1000-fold and 2000-fold liquid of the preparation example 6 and the 1000-fold and 2000-fold liquid of the preparation example 5 have higher field control effect on rice bakanae disease and seedling rot disease than the binary compound agent of 15 percent prothioconazole, cartap ZF 1000-fold liquid and 15 percent imazalil, cartap ZF 1000-fold liquid and the control agent of 20 percent cyanesoxim, cartap WP 1000-fold liquid and 16 percent prochloraz, cartap WP 500-fold liquid, and have obvious difference (Table 3). The control effects of the 2000-fold liquid of the preparation example 4, the 1000-fold liquid of the preparation example 6 and the 1000-fold liquid of the preparation example 5 on the rice aphelenchoides besseyi are higher than those of a binary compound agent 15% prothioconazole-cartap ZF 1000-fold liquid and 15% imazalil-cartap ZF 1000-fold liquid and a control agent 20% cyanesoxim-cartap WP 1000-fold liquid and 16% prochloraz-cartap SC 500-fold liquid, and are remarkable; because the effective dosage of the cartap with insecticidal active ingredients is obviously lower, the control effect of the 4000-fold liquid of the preparation example 4, the 2000-fold liquid of the preparation example 6 and the 2000-fold liquid of the preparation example 5 on the rice aphelenchoides besseyi is lower than that of a binary compound agent of 15 percent prothioconazole-cartap ZF 1000-fold liquid and 15 percent imazalil-cartap ZF 1000-fold liquid, and the control agents of 20 percent cyanesoxim-cartap WP 1000-fold liquid and 16 percent prochloraz-cartap WP 500-fold liquid, and the difference is obvious (Table 3).
The results show that the rice seed treating agent containing prothioconazole, imazalil and cartap has good prevention effect on rice bakanae disease, seedling rot and aphrodisiac disease, when the applied dose is the same, the prevention effect is obviously better than that of a binary compound agent 15% prothioconazole-cartap ZF1000 times liquid and 15% imazalil-cartap ZF1000 times liquid, and the prevention effect when applied under the proper dose is obviously better than that of a conventional agent 20% cyanesoxim-cartap WP 1000 times liquid and 16% prochloraz-cartap WP under the recommended dose, so that the effects of reducing drugs and enhancing effects, reducing the adverse effects of the agents on the environment and delaying the generation of drug resistance of diseases are achieved.
TABLE 3 field control of preferred agents prepared in accordance with the present invention for rice bakanae disease, seedling rot and aphelenchoides
Note that those with different lower case letters after the same column of data indicate significant differences (P < 0.05).
Claims (10)
1. The rice seed treating agent comprises effective components, and is characterized in that the effective components contain prothioconazole, imazalil and cartap, wherein the mass ratio of the prothioconazole and the imazalil with bactericidal activity to the cartap with insecticidal activity is 1-15: 1-15.
2. The rice seed treatment agent according to claim 1, wherein the mass ratio of prothioconazole, imazalil and cartap is 1-2: 1-5 or 1:1: 15.
3. The rice seed treatment agent according to claim 2, wherein the mass ratio of prothioconazole, imazalil and cartap is 1: 1-2: 3.
4. The rice seed treatment agent according to claim 1, further comprising an auxiliary agent.
5. The rice seed treatment agent as claimed in claim 4, wherein the content of the active ingredient in the pesticide composition is 10% to 40%.
6. The rice seed treatment agent according to claim 4 or 5, wherein the formulation is a wettable powder or a seed treatment dispersible powder.
7. The rice seed treatment agent as claimed in claim 6, wherein, for wettable powder, the adjuvant is selected from one or more of filler, dispersant, wetting agent, penetrating agent and stabilizer; for the seed treatment dispersible powder, the auxiliary agent is selected from one or more of a filler, a dispersing agent, a wetting agent, a penetrating agent, a film forming agent and a stabilizing agent; preferably, for wettable powder, the dispersant is selected from sodium lignosulfonate, the wetting agent is selected from nekal, the penetrating agent is selected from penetrating agent T, the stabilizer is selected from glycol and calcium carbonate, and the filler is selected from kaolin; for the seed treatment dispersible powder, the dispersing agent is selected from polyvinyl alcohol, the wetting agent is selected from sodium dodecyl sulfate, the penetrating agent is selected from fatty alcohol-polyoxyethylene ether, the film forming agent is selected from xanthan gum, the stabilizing agent is selected from polyvinyl alcohol and calcium carbonate, and the filler is selected from diatomite.
8. The rice seed treatment agent as claimed in claim 7, wherein the wettable powder comprises, in mass percent: 1 to 30 percent of prothioconazole, 1 to 22.5 percent of imazalil, 1.5 to 17 percent of cartap, 5 to 6 percent of dispersant, 5 to 6 percent of wetting agent, 0.2 to 0.5 percent of penetrant, 0.5 to 1 percent of stabilizer and 100 percent of filler; preferably, the wettable powder comprises: 4 to 5 percent of prothioconazole, 8 to 10 percent of imazalil, 10 to 12 percent of cartap, 5 to 6 percent of dispersant, 5 to 6 percent of wetting agent, 0.2 to 0.3 percent of penetrating agent, 0.5 to 0.7 percent of stabilizer and 100 percent of filler; or, the wettable powder comprises: 1-2% of prothioconazole, 1-2% of imazalil, 15-17% of cartap, 5-6% of dispersing agent, 5-6% of wetting agent, 0.2-0.3% of penetrating agent, 0.5-0.7% of stabilizing agent and 100% of filler;
the dispersible powder for seed treatment comprises the following components in percentage by mass: 2 to 6 percent of prothioconazole, 2 to 6 percent of imazalil, 3 to 10 percent of cartap, 5 to 7 percent of dispersant, 5 to 7 percent of wetting agent, 0.2 to 0.5 percent of penetrant, 1 to 2 percent of film-forming agent, 0.5 to 1 percent of stabilizer and 100 percent of filler; preferably, said seed treatment dispersible powder comprises: 2.5-3% of prothioconazole, 2.5-3% of imazalil, 5-9% of cartap, 5-6% of dispersing agent, 5-6% of wetting agent, 0.3-0.5% of penetrating agent, 1.5-2% of film forming agent, 0.8-1% of stabilizing agent and 100% of filler.
9. The rice seed treatment agent according to claims 1 to 8, for use in preventing and treating rice bakanae disease or/and rice aphelenchoides besseyi disease.
10. The application of the rice seed treatment agent according to claims 1-8 in preventing and treating rice seedling rot.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115039785A (en) * | 2022-07-08 | 2022-09-13 | 安徽省农业科学院植物保护与农产品质量安全研究所 | Medicament composition for preventing and treating wheat stem basal rot and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232810A (en) * | 2005-06-30 | 2008-07-30 | 先正达参股股份有限公司 | Method of reducing mycotoxin contamination of the harvest |
| CN105340946A (en) * | 2015-12-21 | 2016-02-24 | 河北野田农用化学有限公司 | Pesticide composition containing prothioconazole and imidacloprid, preparation method and application |
| CN110521731A (en) * | 2019-08-30 | 2019-12-03 | 江苏丘陵地区镇江农业科学研究所 | It is a kind of to prevent and treat the composition pesticide of rice seed-borne disease, preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232810A (en) * | 2005-06-30 | 2008-07-30 | 先正达参股股份有限公司 | Method of reducing mycotoxin contamination of the harvest |
| CN105340946A (en) * | 2015-12-21 | 2016-02-24 | 河北野田农用化学有限公司 | Pesticide composition containing prothioconazole and imidacloprid, preparation method and application |
| CN110521731A (en) * | 2019-08-30 | 2019-12-03 | 江苏丘陵地区镇江农业科学研究所 | It is a kind of to prevent and treat the composition pesticide of rice seed-borne disease, preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115039785A (en) * | 2022-07-08 | 2022-09-13 | 安徽省农业科学院植物保护与农产品质量安全研究所 | Medicament composition for preventing and treating wheat stem basal rot and application thereof |
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