CN103918676A

CN103918676A - Insecticidal composition

Info

Publication number: CN103918676A
Application number: CN201410152689.XA
Authority: CN
Inventors: 罗晓丹
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-16
Filing date: 2014-04-16
Publication date: 2014-07-16

Abstract

The invention relates to an insecticidal composition. Active ingredients including avermectins, pymetrozine and cycloxaprid are compounded in a proportion of (1-3):(4-15):(4-15) to prepare wettable powder or granules. The insecticidal composition can be used for controlling various pests including lepidoptera, homoptera, thysanoptera, coleopteran and the like on food crops and commercial crops. Compared with single agents, the insecticidal composition has obvious synergistic effects on target pests, obviously improves the control effects, reduces the usage amount of pesticides, reduces the pesticide application cost, reduces the environmental pollution and residues of agricultural products, delays the resistance of the target pests to single insecticides, and has the advantages of high insecticidal speed and long duration.

Description

A kind of Pesticidal combination

Technical field

The invention belongs to technical field of pesticide, be specifically related to a kind of Pesticidal combination.

Background technology

Avermectin be a kind ofly there is desinsection, kill mite, ten hexa-atomic Macrocyclic lactone compounds of eelworm-killing activity, produced by streptomyces griseus Streptomyces avermitilis fermentation in streptomycete, be a kind of new antibiotic insecticides, there is novel structure, the dual-purpose feature of farming animals.Its mechanism of action is to disturb neurophysiology activity, stimulate and discharge γ-aminobutyric acid, and aminobutyric acid has inhibitory action to arthropodan nerve conduction.There is paralysis symptom after contacting with Avermectin with insect larvae in mite class adult, nymph, inertia, does not take food, dead after 2-4 days.Because not causing that insect dewaters rapidly, so Avermectin lethal effect is slower.Along with the raising of people's living standard and the call to pollution-free food, biopesticide gains great popularity in current pesticide market, and Avermectin is the new product of most popular in current biopesticide market and tool keen competition.

Pymetrozine is the new and effective insecticide by the exploitation of Switzerland-Jia Ji company, and its mode of action uniqueness, without knocking down activity, does not have direct toxicity to insect, just stop taking food immediately, and it is irreversible to stop taking food process once insect touches this medicament.There is the brand-new mode of action just because of pymetrozine, make it and other medicaments without any cross resistance, can be used for the control of multiple resistance insect.

Cycloxaprid is a kind of novel anabasine insecticide, it is the antagonist of first nAChR in the world, high-efficiency low-toxicity, be mainly used to prevent and treat sucking pest, all efficient to Brown Planthopper, white-backed planthopper and small brown rice planthopper, cabbage aphid, cucumber aphid and whitefly in bt cotton are also had to good preventive effect, the anti-rice leaf roller of can also holding concurrently, market application foreground is wide.

At present, due to the popularization of single dose product, insect is strengthened just gradually to active component pesticide resistance.For the control of insect that easily produces resistance in agricultural, what main way was exploitation and existing kind without between the new component of cross resistance or existing pesticide species is composite, the former is because required development cost is high, the cycle is long, and the speed that development rate produces less than pest resistance to insecticide far away at present.Therefore, carrying out mixture for the different existing pesticide species of the mechanism of action is best selection.If reasonable mixture ratio, can produce significant synergistic effect, make field control effect significantly be better than the effect of each single dose.On agricultural insect pests control, usually there is certain defect in the insecticide that contains single-activity composition, continuous several times is used and not only makes insect easily develop immunity to drugs, and easily cause the pollution to food and environment, can overcome above shortcoming by rational mixture between pesticide active ingredient.Simultaneously reasonably the composite synergistic effect that active ingredient is produced, can improve preventive effect, reduces effective ingredient consumption, cost-saving, delays the drug-fast generation of insect, and then can alleviate and even avoid the pollution of agricultural chemicals to food and environment.

Summary of the invention

Technical problem to be solved by this invention is the deficiency existing for above-mentioned use single-activity ingredients for preventing and treating insect, and a kind of Pesticidal combination is provided, and reduces medicament usage amount and frequency of utilization, reduces environmental pressure, and delays the generation of pest resistance to insecticide.

The present invention solves the problems of the technologies described above taked technical scheme: a kind of Pesticidal combination, active ingredient is made up of according to the ratio of 1-3:4-15:4-15 is composite Avermectin, pymetrozine and cycloxaprid.

Further, the compound proportion of described active ingredient the best is Avermectin: pymetrozine: cycloxaprid=1:5:5.

Described Pesticidal combination is prepared into wetting powder or granule.

Pesticidal combination of the present invention can be applied to the various pests such as Lepidoptera on control cereal crops and economic crops, Homoptera, thrips, coleoptera, compared with single dose, has following beneficial effect:

(1) target pest is had to obvious synergistic effect, significantly improve control efficiency;

(2) can reduce agricultural chemicals usage amount, reduce the residual of environmental pollution and agricultural product;

(3) delay the pesticide resistance of target pest to single insecticide;

(4) have the advantage that desinsection speed is fast, the lasting period is long concurrently, compared with single medicament, can reduce costs.Embodiment

One, the indoor joint toxicity measuring test of Avermectin, pymetrozine and cycloxaprid

1, the indoor joint toxicity measuring test to rice leaf roller

Avermectin, pymetrozine and cycloxaprid are mixed and are made into ternary built agent as mixture 1-mixture 8 by active ingredient part by weight 1:5:5,1:7:10,1:10:15,1:15:15,3:4:4,3:4:15,3:10:15 and 3:15:4 respectively, Avermectin, pymetrozine and 3 kinds of single doses of cycloxaprid and ternary built agent are respectively diluted to 6 concentration according to geometric ratio gradient respectively from 20ppm, 100ppm, 100ppm and 20ppm, make blank with clear water processing; Be rice leaf roller 3 instar larvaes for examination insect, adopt leaf dipping method to measure, take out after fresh rice leaf is soaked to liquid 30s, indoor drying after unnecessary liquid, examination worm is transferred on rice leaf, after 72 hours, investigates respectively dead borer population, calculate lethality, virulence and co-toxicity coefficient.Measurement result is as shown in table 1.

Table 1 Avermectin, pymetrozine and the cycloxaprid indoor joint toxicity measuring result to rice leaf roller

Medicament	Virulence regression equation	LC50（mg/L）	Co-toxicity coefficient
				Avermectin	Y=1.8917x+3.7808	4.41	/
Pymetrozine	Y=1.0620x+3.4008	32.05	/
				Cycloxaprid	Y=1.6501x+2.7856	21.98	/
Mixture 1	Y=1.0018x+4.1323	7.35	245.4
				Mixture 2	Y=0.9894x+3.8253	15.39	129.9
Mixture 3	Y=1.4838x+3.2255	15.70	135.6
				Mixture 4	Y=1.7031x+3.0792	13.42	167.7
Mixture 5	Y=2.4992x+2.7754	7.76	143.5

Mixture 6	Y=1.7048x+3.2810	10.19	145.1
				Mixture 7	Y=1.3953x+3.7173	8.30	201.3
Mixture 8	Y=2.3849x+2.7589	8.70	190.0

Show from measurement result: the ternary built agent that Avermectin, pymetrozine and cycloxaprid become by active ingredient part by weight 1:5:5,1:7:10,1:10:15,1:15:15,3:4:4,3:4:15,3:10:15 and 3:15:4 mixture is all greater than 120 to the co-toxicity coefficient of rice leaf roller, and synergistic effect is remarkable.

2, the indoor joint toxicity measuring test to cabbage aphid

Avermectin, pymetrozine and cycloxaprid are mixed and are made into ternary built agent as mixture 1-mixture 8 by active ingredient part by weight 1:5:5,1:7:10,1:10:15,1:15:15,3:4:4,3:4:15,3:10:15 and 3:15:4 respectively, Avermectin, pymetrozine and 3 kinds of single doses of cycloxaprid and ternary built agent are respectively diluted to 6 concentration according to geometric ratio gradient from 10ppm, make blank with clear water processing; Selecting healthy, aptery one-tenths aphid of the same size is examination worm, adopts infusion process to measure, and investigates respectively dead borer population after 72 hours, calculating lethality, lethal in dense and co-toxicity coefficient.Measurement result is as shown in table 2.

Table 2 Avermectin, pymetrozine and the cycloxaprid indoor joint toxicity measuring result to cabbage aphid

Medicament	Virulence regression equation	LC50（mg/L）	Co-toxicity coefficient
				Avermectin	Y=2.1333x+4.2405	2.27	/
Pymetrozine	Y=1.9149x+3.1525	9.22	/
				Cycloxaprid	Y=2.0504x+4.6546	1.47	/
Mixture 1	Y=1.6099x+4.6635	1.62	155.4
				Mixture 2	Y=1.8786x+4.5110	1.82	123.8
Mixture 3	Y=1.8279x+4.5765	1.70	130.3
				Mixture 4	Y=1.6772x+4.5227	1.93	131.5
Mixture 5	Y=1.5269x+4.6426	1.71	143.6

Mixture 6	Y=1.4118x+4.7860	1.42	130.0
				Mixture 7	Y=1.6568x+4.5728	1.81	122.9
Mixture 8	Y=1.6557x+4.2873	2.69	144.2

Show from measurement result: the ternary built agent that Avermectin, pymetrozine and cycloxaprid become by active ingredient part by weight 1:5:5,1:7:10,1:10:15,1:15:15,3:4:4,3:4:15,3:10:15 and 3:15:4 mixture is all greater than 120 to the co-toxicity coefficient of cabbage aphid, and synergistic effect is remarkable.

Two, product embodiments

Formula for a product is as shown in table 3, and sequence number 1#-10# is respectively embodiment 1-10, and wherein embodiment 1-5 is prepared into wetting powder, and embodiment 6-10 is prepared into granule.

Table 3 product embodiments formula

Three, product Application Example

Above-described embodiment 1-embodiment 10 products obtained therefroms are used for preventing and treating rice hoppers.And contrast as sun using each single dose, contrast as the moon using clear water, calculate the cost of material of embodiment 1-10 and each single dose, carry out dispenser processing according to unified cost of material.3 days, 7 days and 20 days difference experimental investigation results after medicine, result is as shown in table 4.

Table 4 Avermectin, pymetrozine and the cycloxaprid test of pesticide effectiveness result to rice fulgorid

Claims

1. a Pesticidal combination, is characterized in that, active ingredient is made up of according to the ratio of 1-3:4-15:4-15 is composite Avermectin, pymetrozine and cycloxaprid.

2. Pesticidal combination according to claim 1, is characterized in that, Avermectin: pymetrozine: cycloxaprid=1:5:5.

3. Pesticidal combination according to claim 1 and 2, is characterized in that, described Pesticidal combination is prepared into wetting powder or granule.