CN110959624A

CN110959624A - Insecticidal composition containing azadirachtin

Info

Publication number: CN110959624A
Application number: CN201911352022.3A
Authority: CN
Inventors: 沈英; 孙波
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-07

Abstract

The invention discloses an insecticidal composition, belonging to the technical field of pesticides, wherein active ingredients of the composition comprise chlorfluazuron and azadirachtin, and the mass ratio of the chlorfluazuron to the azadirachtin is 20: 1-1: 5. The composition has good synergistic effect on controlling pests such as beet armyworm and the like, reduces the using amount of active ingredients under the condition of improving pesticide effect, reduces production cost and effectively controls the pests.

Description

Insecticidal composition containing azadirachtin

Technical Field

The invention specifically relates to an insecticidal composition, and belongs to the technical field of pesticides.

Background

Azadirachtin is a high-efficiency compound separated from neem seeds, and has high-efficiency antifeedant, stomach-poisoning, contact-killing and growth-development-inhibiting effects on a plurality of insects. The action mechanism is mainly to disturb the internal secretion of insects, and the action targets are cranial nerve secretory cells, ventral bodies, prothymus gland and the like.

Tert-oxime urea is a high-efficiency pesticide (development code number NK-17) independently developed in China. Chinese patent CN1891686A discloses that the terximes urea has excellent insecticidal, acaricidal and ovicidal activity in a wider range, and can be used for controlling lepidoptera, coleopteran, dipteran, orthopteran and homopteran pests, especially for controlling lepidopteran pests.

Disclosure of Invention

The invention aims to provide an insecticidal composition aiming at the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows: the active ingredients of the insecticidal composition are chlorfluazuron and azadirachtin, and the mass ratio of the chlorfluazuron to the azadirachtin is 20: 1-1: 5.

Preferably, the mass ratio of the flufenoxuron to the azadirachtin is 10: 1-1: 1.

More preferably, the mass ratio of the chlorfluazuron to the azadirachtin is 5:1 or 3: 1.

The application of the composition in pest control.

Wherein the pests include beet armyworm.

The compositions of the invention can treat all plants and plant parts. Plants are to be understood here as meaning all plants and plant populations such as desired and undesired wild plants or crop plants (including naturally occurring crop plants). The crop plants can be plants which have been obtained by conventional plant breeding and optimization methods or by biotechnological and genetic engineering methods or by combinations of the above methods, including the transgenic plants and including the plant varieties which are or are not protected by the plant variety method. Plant parts are to be understood as meaning all above-and below-ground parts and organs of plants, such as stems, leaves, flowers and roots, examples which may be mentioned being leaves, needles, petioles, trunks, flowers, fruit bodies, fruits, seeds, roots, tubers and rhizomes. Plant parts also include harvested plants and vegetative and generative propagation material, for example cuttings, tubers, rhizomes, cuttings and seeds.

The plants and plant parts are treated with the compositions according to the invention by applying the compounds directly or by acting them on their environment, habitat or storage area by customary treatment methods, for example by dipping, spraying, fumigating, misting, broadcasting, brushing and, in the case of propagation material, in particular seeds, also by one or more coatings.

The compositions of the present invention can be converted into conventional formulations such as solutions, emulsions, wettable powders, suspensions, powders, dusts, pastes, soluble powders, granules, concentrated suspoemulsions, etc.

These formulations are prepared in a known manner, for example by mixing the active compound combination with extenders, i.e. liquid solvents, and/or solid carriers, optionally with the use of surfactants, i.e. emulsifiers and/or dispersants, and/or foaming agents.

The invention has the following beneficial effects:

the composition has good synergistic effect on controlling pests such as beet armyworm and the like, reduces the using amount of active ingredients under the condition of improving pesticide effect, reduces production cost and effectively controls the pests.

Detailed Description

The present invention will be described in further detail with reference to examples, but the present invention is by no means limited to the following examples.

Example 1

The combined toxicity of the t-oxime urea and the azadirachtin is determined by a conventional biological determination method by taking 2-instar larvae of spodoptera exigua as test objects.

The virulence evaluation adopts a Sun cloud Peel method to calculate the cotoxicity coefficient (CTC), and the CTC value is used for evaluating the combined virulence effect of the two medicaments. The CTC value is less than 80, the antagonism is obtained, the synergism is obtained when the CTC value is more than 120, and the addition effect is obtained when the CTC value is 80-120.

The test results are as follows:

TABLE 1 Combined virulence assay results

Reagent for testing	LC50(μg/ml)	Co-toxicity coefficient
			Tertiary oxime worm urea	3.41	/
Nimbin	51.19	/
			T-oximinostrobilurin: azadirachtin 20:1	2.93	121.80
T-oximinostrobilurin: azadirachtin 10:1	2.45	152.09
			T-oximinostrobilurin: azadirachtin 5:1	2.33	173.31
T-oximinostrobilurin: azadirachtin 3:1	2.52	176.50
			T-oximinostrobilurin: azadirachtin 1:1	4.04	158.27
T-oximinostrobilurin: azadirachtin 1:3	7.98	142.46
			T-oximinostrobilurin: azadirachtin 1:5	12.54	122.39

Example 2

15 percent of the neoximes urea,

5 percent of nimbin,

23 percent of lauryl alcohol group sodium sulfate,

24 percent of alkyl sulfonate,

33% of diatomite;

drying, cooling, mixing and grinding the components to obtain the wettable powder.

The field control effect is as follows:

the wettable powder prepared in the embodiment is diluted by 2000 times, and is sprayed on the spodoptera exigua, and the control effect on the spodoptera exigua on the 7 th day of application is 97.02%.

Example 3

7.5 percent of the neoximes urea,

2.5 percent of azadirachtin,

10 percent of dodecyl phenol polyoxyethylene ether,

the content of dimethylbenzene is 55 percent,

the content of methanol is 14 percent,

4 percent of castor oil,

6 percent of epoxidized soybean oil,

laurocapram is 1%;

the components are put into a preparation kettle to be uniformly mixed to obtain the missible oil.

The field control effect is as follows:

the emulsifiable concentrate prepared in the embodiment is diluted by 1000 times, and is sprayed on the spodoptera exigua, and the control effect on the spodoptera exigua on the 7 th day after the application is 97.35%.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The insecticidal composition is characterized in that active ingredients of the composition comprise chlorfluazuron and azadirachtin, and the mass ratio of the chlorfluazuron to the azadirachtin is 20: 1-1: 5.

2. The composition according to claim 1, wherein the mass ratio of the sulfoxaflor to the azadirachtin is 10:1 to 1: 1.

3. The composition of claim 1, wherein the weight ratio of the sulfoxaflor to azadirachtin is 5:1 or 3: 1.

4. Use of a composition according to claim 1 for pest control.

5. The use as claimed in claim 4, wherein the pest is beet armyworm.

6. A pesticidal formulation formulated from the composition of claim 1.

7. The wettable powder for preventing and treating beet armyworm is characterized by being prepared from the following components in percentage by weight through drying, cooling, mixing and grinding: 15% of t-oxime urea, 5% of azadirachtin, 23% of lauryl alcohol sodium sulfate, 24% of alkyl sulfonate and 33% of diatomite.