CN113615698B - Nematicidal composition and application thereof - Google Patents

Nematicidal composition and application thereof Download PDF

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Publication number
CN113615698B
CN113615698B CN202110986438.1A CN202110986438A CN113615698B CN 113615698 B CN113615698 B CN 113615698B CN 202110986438 A CN202110986438 A CN 202110986438A CN 113615698 B CN113615698 B CN 113615698B
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active ingredient
composition
nematodes
formula
root
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CN113615698A (en
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杨志鹏
葛家成
张永芳
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Qingdao Hailier Biotechnology Co ltd
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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
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • 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
    • 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
    • A01N47/22—O-Aryl or S-Aryl esters thereof
    • 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
    • A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
    • A01N57/10—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds
    • A01N57/14—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds containing aromatic radicals

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  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a nematicidal composition and application thereof, wherein the composition contains an active ingredient A and an active ingredient B, the weight ratio of the active ingredient A to the active ingredient B is 1:50-50:1, and the active ingredient A is any one of phoxim and carbofuran; and B is a compound shown in a formula I. The nematicidal composition disclosed by the invention is used for preventing and controlling plant parasitic nematodes. The nematicidal composition has good nematicidal activity and small toxicity to human and livestock.

Description

Nematicidal composition and application thereof
Technical Field
The invention belongs to the technical field of pesticide compositions, and particularly relates to an active ingredient A and active ingredient B composition for preventing and controlling root-knot nematodes, and improving the actual preventing and controlling effect.
Background
Plant parasitic nematodes are a worm type and can be parasitic on plant tissues such as plant roots, stems, leaves and the like, and are currently the second largest type of pathogen which is harmful to agricultural production, and the direct economic loss caused by plant parasitic nematodes is up to 1570 hundred million dollars each year. Plant parasitic nematodes can not only infect hosts through secretions, but also can cause plant secondary diseases by transmitting other plant pathogens. Plant parasitic nematodes are of up to 200 genera, involving more than 5000 species, where the major plant parasitic nematodes that jeopardize agriculture and forestry production include root-knot nematodes (Meloidogyne), cyst nematodes (hetodera), aphelenchus xylophilus (Aphelenchina), stem nematodes (Ditylenchus), root-knot nematodes (Nacoblus) and root-knot nematodes (Pratenylenchus), pine nematodes (Bursa phelenchus xylophilus), and the like, with cyst nematodes (hetodera) and root-knot nematodes (Meloidogyne) being the main species.
The nematode control method includes agricultural control, physical control, chemical control, biological control and the like. Wherein chemical control mainly uses chemical reagents such as halohydrocarbons, organic phosphorus, carbamates and the like to control insects. The chemical control has quick effect and good effect, is the most main means for controlling nematodes at present, but the application part of the chemical control agent is mainly at the root or soil, the application amount is large, and the chemical control agent is repeatedly used by a single agent, so that the nematode resistance is increasingly heavy. At present, the nematicides with better effects are few and only more than ten, and as the existing nematicides with better effects have higher toxicity to people and livestock, some varieties have phytotoxicity to crops and influence the use of the nematicides, the novel, efficient and environment-friendly nematicides are urgently needed to be developed.
The biological activity of the compound on the target and the combination of different varieties are determined, so that the compound is one of effective methods for developing pesticides, improving the control effect and delaying the nematode resistance. The inventor conducts intensive research on the compound shown in the formula I, phoxim and carbofuran and the combination thereof, discovers that the compound shown in the formula I, phoxim and carbofuran have better activity on root-knot nematodes, meanwhile, the compound shown in the formula I is mixed with any one of phoxim and carbofuran, has obvious synergism on the nematodes in a certain mixing proportion range, can effectively improve the nematode prevention effect, and further researches the invention. The compound of the formula I and any one of phoxim and carbofuran are mixed for preventing and treating nematodes, which is not reported at present.
Disclosure of Invention
The invention aims to provide a pesticide composition with higher activity on nematodes, which improves the actual control effect and effectively delays the occurrence of drug resistance of the nematodes.
The invention aims to achieve the aim, and the aim is achieved by the following technical scheme:
a nematicidal composition comprises an active ingredient A and an active ingredient B; the mass ratio of the active ingredient A to the active ingredient B is 1:50-50:1, preferably 1:20-20:1. The active ingredient A is any one of phoxim and carbofuran; the active ingredient B is a compound of the formula I;
the compound of the formula I is a novel nicotinamide special nematicide developed by Zhengda company, can paralyze nematode larvae and inhibit ova, and can effectively control nematodes such as root knots, beet cysts, corn short bodies and the like on crops such as cucumber, tomato, corn, beet and the like by direct application or seed treatment. The chemical structure of the compound of formula I is as follows:
when the active ingredient A is phoxim, the mass ratio of the active ingredient A to the active ingredient B is 1:50-50:1;
further, the mass ratio of the active ingredient A to the active ingredient B is 1:20-20:1;
further, the mass ratio of the active ingredient A to the active ingredient B is 1:10-5:1;
further, the mass ratio of the active component A to the active component B is 1:2-2:1,
when the active ingredient A is phoxim, the mass ratio of the active ingredient A to the active ingredient B is 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1 and 20:1;
further, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1;
still further, 1:2, 1:1, 2:1.
When the active ingredient A is carbofuran, the mass ratio of the active ingredient A to the active ingredient B is 1:50-50:1;
further, the mass ratio of the active ingredient A to the active ingredient B is 1:20-20:1;
further, the mass ratio of the active ingredient A to the active ingredient B is 1:10-5:1;
further, the mass ratio of the active component A to the active component B is 1:5-2:1;
when the active ingredient A is carbofuran, the mass ratio of the active ingredient A to the active ingredient B is 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1 and 20:1;
further, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1,
still further, 1:5, 1:3, 1:2, 1:1, 2:1.
The composition contains an agricultural allowable pesticide auxiliary ingredient besides an active ingredient; the sum of the weight of the active ingredient A and the weight of the active ingredient B accounts for 0.1-90% of the composition;
further, the sum of the weight of the active ingredient A and the weight of the active ingredient B accounts for 1% -50% of the composition;
further, the sum of the weight of the active ingredient A and the weight of the active ingredient B accounts for 1% -20% of the composition;
further, the pesticide auxiliary ingredient is one or more selected from wetting agents, dispersing agents, emulsifying agents, thickening agents, disintegrating agents, antifreezing agents, antifoaming agents, solvents, preservatives, stabilizers, synergists and carriers;
the composition can be prepared into agriculturally acceptable dosage forms, and the dosage forms are granules, emulsifiable concentrates and soluble solutions.
The invention also includes the use of the nematicidal composition to kill plant parasitic nematodes; the nematodes are preferably root-knot nematodes (Meloidogyne), cyst nematodes (Heterodera), aphelenchus xylophilus (Aphelenchina), stem nematodes (Ditylenchus), root-knot nematodes (Nacoblus), root-rot nematodes (Pratelyenchus), pine nematodes (Bursa phelenchus xylophilus);
further, the nematode is a root knot nematode (Meloidogyne).
Compared with the prior art, the invention has the following advantages:
1) The composition has good nematicidal activity;
2) The pesticide has low toxicity, less residue in crops and little harm to human and livestock, well solves the problems of high toxicity and more residue in the crops of the existing nematicide, and improves the safety of agricultural production;
3) The composition is a mixture of compounds with different action mechanisms, can delay the generation of drug resistance of nematodes, lighten environmental pressure and prolong the service life of the compounds.
Detailed Description
For a better understanding of the nature of the present invention, reference will now be made in detail to the following examples, which are not intended to limit the invention, but are to be construed as limiting the scope of the invention.
Indoor Activity examples:
example 1: test target: southern root knot nematode [ Meloidogyne incongnita (Kofold & White) Chitwood ] was tested, isolated from tomato root samples from the Qingdao city, the Mitsui, and grown and propagated on living tomato plants in the laboratory.
Test agent: 90% of the compound of formula I, 85% of the phoxim, and 97% of carbofuran.
Other reagents: acetone, tween 80, etc.
Test treatment and mode: dissolving the compound of the formula I, phoxim and carbofuran in acetone to prepare high-concentration mother solution, respectively diluting the mother solution into series concentrations by using 0.1% Tween 80 aqueous solution containing a proper amount of surfactant according to an equal ratio, and carrying out preliminary tests on the compound of the formula I, phoxim, carbofuran and different proportions of the compound of the formula I, carbofuran and different proportions of the carbofuran, and determining the test concentration range of each compound. The treatment of each medicine is carried out by setting 5 concentrations according to the content of the effective components, and the comparison is carried out by using the aqueous solution of the solvent which does not contain the same content of the medicine.
Preparation of root-knot nematode suspension: the method comprises the steps of picking root knot nematode egg masses from tomato root knots with serious root knot nematode disease, cleaning with clear water, placing the root knot nematode egg masses on filter paper in a culture dish, adding a proper amount of distilled water, placing the filter paper in a culture box at 25+/-1 ℃ for incubation and culture, collecting second-instar larvae with consistent instar after 24 hours, and preparing root knot nematode suspension, wherein each 1mL of suspension contains at least 100 nematodes for standby.
The measuring method comprises the following steps: sequentially sucking 3mL of liquid medicine from low concentration to high concentration by a pipette, respectively adding the liquid medicine into a test tube, sucking 3mL of prepared equivalent nematode suspension into the test tube, uniformly mixing the liquid medicine and the nematode suspension in equivalent, transferring 3mL of the mixed liquid into a small hole of a porous biochemical test plate by a pipette, covering, culturing for 24h under the conditions of the temperature of 25+/-1 ℃, the relative humidity of 75+/-1% and the photoperiod of 14L:10D, repeating for 4 times, and setting the treatment without the medicament as a control.
The investigation method comprises the following steps: after 24 hours of treatment, the death condition of the two-instar larvae of the root-knot nematodes is checked, 1mL of mixed solution is taken from each treatment, the death condition of the nematodes is observed under an dissecting mirror, and the number of the bus worms and the number of the dead nematodes are recorded. Nematodes cannot bend to die when touched with bamboo filament needles.
The calculation method comprises the following steps:
P 1 (mortality) =k (number of dead insects)/N (total number of insects) ×100
P 2 (corrected mortality) = (treatment area mortality-control area mortality)/(100-control area mortality) ×100
If the death rate of the control area is less than 5%, correction is not needed; if the death rate of the control area is more than 15%, the test needs to be reworked; if the mortality rate of the control area is between 5% and 15%, the mortality rate needs to be corrected.
Statistical analysis: according to the concentration log value of each medicament and the corresponding mortality, carrying out regression analysis by using DPS 13.5 statistical software to obtain a regression equation of each medicament, and calculating LC 50 A 95% confidence limit; co-toxicity coefficient (CTC) of the blends was calculated according to the grand cloud Pei method and the type of combined effect was evaluated.
CTC.gtoreq.120 shows synergistic effect, CTC.gtoreq.80 shows antagonistic effect, CTC between 80 and 120 shows additive effect.
TABLE 1 Phoxim, compounds of formula I and their blending pair southern root knot nematode in-house results
The phoxim and the compound of the formula I have different action mechanisms, and the compound is beneficial to overcoming or delaying the occurrence of drug resistance of nematodes, reducing the dosage, lowering the cost and improving the control effect. The test result shows that (see table 1), the mixed preparation of phoxim and the compound of the formula I has better control effect on the meloidogyne incognita at the ratio of 1:20-20:1, and the combined effect is represented by addition or synergy; when the mixing ratio of phoxim to the compound of the formula I is 1:10-5:1, the combined action is shown as synergy; when the mixing ratio of phoxim to the compound of the formula I is 1:2-2:1, CTC is more than 150, and the synergy is obvious; when the mixing ratio of phoxim to the compound of the formula I is 1:1, the maximum CTC value is 238.36, which shows that the activity is the best at the ratio.
TABLE 2 carbofuran, compounds of formula I and their mixture for indoor measurement of meloidogyne incognita
The carbofuran and the compound of the formula I have different action mechanisms, and the compound is beneficial to overcoming or delaying the occurrence of drug resistance of nematodes, reducing the dosage, lowering the cost and improving the control effect. Experiments show that (see Table 2), the mixed preparation of carbofuran and the compound of the formula I has better control effect on the meloidogyne incognita at the ratio of 1:20-20:1, and the combined effect is represented by addition or synergy; when the mixing ratio of carbofuran and the compound of the formula I is 1:10-5:1, the combined effect is shown as synergy; when the mixing ratio of carbofuran and the compound of the formula I is 1:5-2:1, CTC is more than 150, and the synergy is obvious; when the mixing ratio of carbofuran and the compound of the formula I is 1:2, the maximum CTC value is 211.66, which shows that the activity is the best at the ratio.
Formulation preparation examples:
the granule processing technology comprises the following steps: the preparation method comprises the steps of adopting an adsorption granulation method, uniformly mixing a carrier, a binder, a wetting agent and a filler, granulating, drying, adding the raw materials and other auxiliary agents, and uniformly mixing to obtain the granule.
Example 2:4.0% phoxim, compound granule of formula I (1:1)
The formula comprises the following components: 2.0% phoxim, 2.0% compound of formula I, 2.0% polyvinyl acetate, 1.0% aluminum chloride, 1.0% deionized water, 3.0% sodium lignin sulfonate, 2.0% white carbon black, and kaolin.
Example 3:6.0% carbofuran, compound granules of formula I (1:2)
The formula comprises the following components: 2.0% carbofuran, 4.0% compound of formula I, 4.0% polyvinyl acetate, 1.0% aluminum chloride, 3.0% deionized water, 3.0% sodium lignin sulfonate, 4.0% white carbon black, kaolin.
The processing technology of the emulsifiable concentrate comprises the following steps: the raw materials are dissolved in a solvent according to a certain proportion, and then a certain amount of emulsifying agent and other auxiliary agents are added, and the mixture is stirred and mixed to prepare the homogeneous transparent oily liquid, namely the emulsifiable concentrate.
Example 4:3.0% phoxim, compound emulsifiable concentrate of formula I (1:2)
The formula comprises the following components: 1.0% phoxim, 2.0% compound of formula I, 1.0% xylene, 3.0% calcium dodecylbenzenesulfonate, 2.0% cyclohexanone, 4.0% N-soyabean oil-based trimethylene diamine, soybean oil being the balance.
Example 5:8.0% carbofuran, compound emulsifiable concentrate of formula I (1:3)
The formula comprises the following components: 2.0% carbofuran, 6.0% compound of formula I, 2.0% xylene, 5.0% calcium dodecylbenzenesulfonate, 3.0% cyclohexanone, 6.0% N-soyabean oil-based trimethylene diamine, soybean oil making up the balance.
The processing technology of the soluble agent comprises the following steps: the raw materials are dissolved in a solvent according to a certain proportion, and then a certain amount of emulsifying agent and other auxiliary agents are added, and the mixture is stirred and mixed to prepare the homogeneous transparent oily liquid, namely the soluble agent.
Example 6:6% phoxim, compound of formula I soluble agent (2:1)
The formula comprises the following components: 4.0% phoxim, 2.0% compound of formula I, 4.0% fatty alcohol polyoxyethylene ether, 2.0% organic silicon, 2.5% N-acyl glycine ester and DMF make up the balance;
example 7:10% carbofuran, compound of formula I, soluble solution (1:1)
The formula comprises the following components: 5.0% carbofuran, 5.0% compound of formula I, 5.5% fatty alcohol polyoxyethylene ether, 3.0% organosilicon, 3.0% N-acyl glycine ester, DMF make up the balance.
Field efficacy test
Example 8: different mixing pair root knot nematode field control effect test
Test subjects, crops and varieties: the tomato root-knot nematode (Meloidogyne spp) is mainly southern root-knot nematode [ Meloidogyne incongnita (Kofold & White) Chitwood ] through separation and identification, and the tomato variety is European 8848, and has good growth condition.
The test was set in village town and western village in the Yang Ling demonstration area of Shaanxi province.
Cell area and repetition: 20m per cell 2 Repeated 4 times.
TABLE 3 test design of reagents for test
The test is carried out in 15 days of 4 months in 2018, and the root irrigation/broadcasting method is adopted for carrying out the drug administration, wherein the root irrigation liquid medicine amount of each plant is 250mL/250g.
The investigation method comprises the following steps: five-point sampling method is adopted, 4 plants are investigated at each point, and the morbidity, disease index and prevention and treatment effect are calculated.
The disease classification method comprises the following steps:
level 0: the root system has no insect gall;
stage 1: small amount of small insect gall is present in the root system;
3 stages: two thirds of the lines are covered with small insect gall;
5 stages: the root system is covered with small insect gall and has secondary insect gall;
7 stages: the root system forms fibrous root clusters.
Disease index = Σ (number of disease plants at each stage×number of relative stages)/(total number of investigation×7) ×100;
control effect (%) = [ (CK-PT)/CK ] ×100;
wherein CK is the disease index of the blank control area; PT is the index of the condition in the treatment area of the agent.
Table 4 results of field trials
As shown in Table 4, the treatments have good effects of preventing and treating tomato root knot nematodes, and the nematode reduction rate and the prevention effect of each example are over 90% 30 days after application.

Claims (12)

1. The nematicidal composition is characterized by comprising an active ingredient A and an active ingredient B, wherein the mass ratio of the active ingredient A to the active ingredient B is 1:10-5:1; the active ingredient A is any one of phoxim and carbofuran; the active component B is a compound of the formula IFormula I.
2. The composition of claim 1, wherein the active ingredient a is phoxim and the weight ratio of the active ingredient a to the active ingredient B is 1:2-2:1.
3. The composition of claim 1, wherein the active ingredient a is carbofuran and the weight ratio of active ingredient a to active ingredient B is 1:5-2:1.
4. The composition according to claim 1, wherein the sum of the weights of active ingredient a and active ingredient B is from 0.1% to 90% of the composition.
5. The composition of claim 4, wherein the sum of the weights of active ingredient a and active ingredient B is 1% -50% of the composition.
6. The composition of claim 5, wherein the sum of the weights of active ingredient a and active ingredient B is 1% -20% of the composition.
7. The composition of claim 1, wherein the composition comprises, in addition to the active ingredient, an agriculturally acceptable pesticidal adjunct ingredient.
8. The composition of claim 7, wherein the pesticide adjuvant is selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, freezing point depressants, defoamers, preservatives, stabilizers, synergists, and carriers.
9. The composition of claim 8, wherein the composition is formulated as a granule, a cream, a solution.
10. The use of a composition according to any one of claims 1 to 9 for controlling plant pests, wherein the plant pests are plant parasitic nematodes.
11. The use according to claim 10, wherein the plant parasitic nematodes are any one or more of root knot nematodes, cyst nematodes, caenorhabditis elegans, stem nematodes, root nodule nematodes, root rot nematodes, pine wood nematodes.
12. The use according to claim 11, wherein the plant parasitic nematode is a root knot nematode.
CN202110986438.1A 2021-08-26 2021-08-26 Nematicidal composition and application thereof Active CN113615698B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111741945A (en) * 2018-02-13 2020-10-02 先正达参股股份有限公司 Novel crystalline forms

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111741945A (en) * 2018-02-13 2020-10-02 先正达参股股份有限公司 Novel crystalline forms

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