CN102599170A - Insecticidal composition - Google Patents

Abstract

The invention relates to an insecticidal composition. The insecticidal composition comprises two active components, namely ethyl spinosad and cyantraniliprole. The insecticidal composition has the advantages that the toxicity is low, the efficiency is high, the insecticidal spectrum is wide, the insecticidal activity is excellent for rice-stem borers, the used amount is reduced, simultaneously the generation of drug resistance is delayed, the pollution to the environment is reduced, and the safety and no drug hazard to the plants are achieved.

Description

A kind of Pesticidal combination

Technical field

The invention belongs to pesticide field, relate in particular to the Pesticidal combination of a kind of cyanogen insect amide and ethyl multiple killing teichomycin.

Background technology

Cyanogen insect amide also is bromine cyanogen insect amide (cyantraniliprole); It is E.I.Du Pont Company's second generation ryania acceptor inhibitor insecticides that success is developed after the chlorine insect amide; Cyanogen insect amide is to form through the various polar groups that change on the phenyl ring; Have more efficiently, applicable crops is more extensive, can effectively prevent and treat Lepidoptera, Semiptera and coleopteran pest.Cyanogen insect amide has stronger permeability, and medicament can pass stem's epidermal cell and get into xylem, conducts to other positions along xylem.Cyanogen insect amide can be used for the pest control of crops such as leguminous plant, cotton, paddy rice, beet, soybean, brassicaceous vegetable, muskmelon.

Ethyl multiple killing teichomycin (Spinetoram) is a kind of novel multiple killing teichomycin insecticides of being produced by Dow AgroSciences; It can effectively control the important insect pest on fruit tree and the nut; Be mainly used in control lepidopterous larvae, thrips and Liriomyza etc., diamond-back moth, beet armyworm, Liriomyza, thrips, prodenia litura, lima bean pod borer are had good control efficiency.Its biologically active is higher, and insecticidal spectrum is wider, and quick-acting is better, and the lasting period is longer, resistance of rainwater washing against, characteristics such as low toxic and environment-friendly.

Owing to use cyanogen insect amide or ethyl multiple killing teichomycin at present separately; Exist the cost such as packing, labour of medication bigger; Problems such as quick-acting or lasting effect are relatively poor, and use single agent to be easy to generate pesticide resistance, long-term use meeting causes bigger pollution to environment.In order to develop quick-acting and lasting effect is higher, lower-cost agricultural chemicals, we have carried out indoor biometrics and field efficacy experiment, filter out cyanogen insect amide and the composite prescription of ethyl multiple killing teichomycin, and it has the synergistic effect of obvious point.

Summary of the invention

The purpose of this invention is to provide that a kind of insecticidal activity is efficient, lasting effect is long, the Pesticidal combination of the high and low poison of quick-acting, environmental protection.Concrete relate to cyanogen insect amide and the ethyl multiple killing teichomycin is the pesticidal preparations of basis.

Above-mentioned Pesticidal combination contains cyanogen insect amide 1%～40%, ethyl multiple killing teichomycin 1%～40%.

Utilize the described insecticides of the invention described above, be equipped with the known auxiliary agent of those skilled in that art, can process formulation of the present invention with those skilled in that art's known method.Its formulation that can process is suspending agent, water dispersible granules.

Advantage that the present invention has and beneficial effect: 1. the desinsection scope is wide; 2. quick-acting is strong, the lasting period is long; 3. low toxicity, noresidue, nuisanceless, environmentally safe; 4. use compound formulation, two kinds of insecticides also have synergistic effect, and the consumption of two kinds of insecticides reduces during all than single use, thereby has improved insecticidal effect, has increased safety, has reduced environmental pollution.

Embodiment

Following instantiation is in order to further explain the present invention, but the present invention absolutely not only is limited to following these embodiment.Percentage all is weight percentage in the prescription, and employed former medicine and auxiliary agent are other producers and buy.

Formulation examples is following:

1, the preparation of suspending agent

According to the prescription requirement, be medium with water, with grinding in the adding sand mills such as active ingredient, wetting agent, dispersant, thickener, antifoaming agent, the back adds emulsification in the high-shear emulsifying still, makes suspending agent.

Suspending agent formula

2, the preparation of water dispersible granules

Active ingredient, wetting agent, dispersant, adhesive, filler etc. are fully mixed in the ratio of prescription, after ultrafine crusher is pulverized, add an amount of purified water, make water dispersible granules through kneading, granulation, drying, screening.

The water-dispersible grain agent prescription

Preparation requirement according to above suspending agent or water dispersible granules; Preparation cyanogen insect amide content 1%～40%, ethyl multiple killing teichomycin content is at 1%～40% multiple composite product; Every kind of complex preparation selects comparatively suitable formulation to process according to the content of former medicine, therefrom selects several kinds of representational former medicine content to carry out the indoor biometrics experiment.

Rice-stem borer (Chilo suppressalis) popular name borer, borer, moth stalk worms etc. are the formidable opponents of paddy rice.Larva moth food stem stalk causes the withered heart, and striped rice borer has the strain of commentaries on classics harm habit, and a Chilo spp larvae can endanger many strains paddy rice, causes dead leaf sheath, the withered heart.If untimely control, the field a lot of withered heart seedlings occur through regular meeting, and part field piece is not is not prevented and treated striped rice borer because of nursery period, and field withered heart seedling ratio is up to 30% now, and part location, field withered heart seedling ratio surpasses 50%, causes very big loss.Cyanogen insect amide and ethyl multiple killing teichomycin are two kinds of active ingredients that insecticidal activity is very high, according to their the effect characteristics and mechanism of action, the object of indoor biometrics are decided to be rice-stem borer.

The method of indoor biometrics is: adopt capillary trace drop method, capillary trace dropper volume is 1.0 μ L.With micro-dropper with soup by a drop in the back side of Chilo spp larvae, each concentration is handled about 50 larva, the culture dish that it is 9cm that per 5 larvas are put into a diameter, the built-in a small amount of feed of ware supplies to get food, in addition with 50 larvas of acetone drop as contrast.Larva after treatment still is placed in the receptacle, checks lethality behind the 48h.Data are handled with the SPSS software statistics.Obtain toxicity regression formula, the lethal concentration of 50, correlation coefficient etc., and obtain co-toxicity coefficient with the abundant method of Sun Yun.

The co-toxicity of mixture preparation adopts the abundant co-toxicity coefficient method representation of Sun Yun:

The theoretical toxicity index A=∑ of mixture preparation (toxicity index of certain medicine * percentage of this pharmaceutically active ingredient in mixture).

C was synergistic effect greater than 120 o'clock, less than 80 o'clock be antagonism, be addition during 80-120.

The different representative formulations of table 1 are to the toxicity test result of rice-stem borer

Analyze above-mentioned data, measure the result and show that when cyanogen insect amide and ethyl multiple killing teichomycin different proportion were composite, the co-toxicity coefficient of prescription all had obvious synergistic effect all greater than 120.It is 4 maximum with prescription 5 co-toxicity coefficients wherein to fill a prescription, and is respectively 171.63 and 162.96.

Through the indoor biometrics test, select the field trial that the bigger prescription of CTC 4, prescription 5 and the less prescription 9 of CTC are prevented and treated rice-stem borer, confirm the effect of each prescription control rice-stem borer; Simultaneously through with the effect comparison of cyanogen insect amide, the agent of ethyl multiple killing teichomycin list, verify the synergistic effect after composite.Concrete test method and data are following:

Test the test of pesticide effectiveness that one: 15% cyanogen insect amide ethyl multiple killing teichomycin SC, 10% cyanogen insect amide ethyl multiple killing teichomycin SC, 41% cyanogen insect amide ethyl multiple killing teichomycin WDG do the field control striped rice borer, use 10% ethyl multiple killing teichomycin SC, 10% cyanogen insect amide SC simultaneously as contrast.The test place is the separated town of Hanchuan City Liu of Xiaogan Prefecture, Hubei Province, and the time is on July 11st, 2011, test totally four processing, and each handles three repetitions, sub-district randomized arrangement, sub-district area 100m ², the planting habit of all sub-districts all planting habit with local is identical, and is record dispenser same day and all synoptic data thereafter, specific as follows:

Table 2 duration of test meteorological data

The investigation standard is: 7d gets killed strain 50 strains at random behind the medicine in each sub-district, and the life or death number of Chilo spp larvae is looked in stripping, calculates lethality; 150 clumps of parallel sampling method samplings are adopted in 15d, the every sub-district of 25d behind the medicine, investigate withered calculation, calculate withered heart rate and seedling protecting effect at last.Specifically data (data are the mean value of three repetitions) are as follows:

The effect table of table 3 15% cyanogen insect amide ethyl multiple killing teichomycin SC and other chemical control striped rice borer

Annotate: data are the mean value that repeats for 3 times in the table, and letter is all Duncan testing differentia remarkable time mutually: in July, 2011 place: the Hubei Xiaogan

Can find out from above data; Under the situation of identical using dosage; 25d behind medicine; The control rate of 15% cyanogen insect amide ethyl multiple killing teichomycin SC, 10% cyanogen insect amide ethyl multiple killing teichomycin SC reaches 88.46% and 86.35% respectively, the effect when being higher than 10% cyanogen insect amide SC and 10% ethyl multiple killing teichomycin SC list agent use far away, and difference is extremely remarkable.Simultaneously, 41% cyanogen insect amide ethyl multiple killing teichomycin 25d after medication, its control efficiency to striped rice borer has also reached 77.25%, and the preventive effect when only using a kind of single agent is significantly improved.Simultaneously, above-mentioned field trial is also in indoor biometrics test for data match (CTC is big more, and synergistic effect is big more).Therefore, no matter be can find out from CTC or seedling protecting effect, the control efficiency of prescription 4 is superior to filling a prescription 5, and comprehensive dispenser cost factor is considered, thinks that prescription 4 is even more ideal.

4 carry out further test to filling a prescription, filtered out the optium concentration of control striped rice borer.Experimental scheme 10g/ mu, 12g/ mu, 14g/ mu and 4 concentration gradients of 16g/ mu are also done contrast with the effect of 10% cyanogen insect amide SC (12g/ mu), 10% ethyl multiple killing teichomycin SC (12g/ mu); Test method and investigation method are the same, and specifically data (mean values of three repetitions) are as follows:

Table 4 prescription 4 different amounts control striped rice borer effect table

Annotate: data are the mean value that repeats for 3 times in the table, and letter is all Duncan testing differentia remarkable time mutually: in July, 2010 place: the Hubei Xiaogan

Can find out from the result of the above-mentioned test of pesticide effectiveness; Increase along with the prescription dosage; Drug effect also increases to some extent, and 15% cyanogen insect amide ethyl multiple killing teichomycin SC consumption is a 12g/ mu, and the seedling protecting effect of 25d is 88.50% behind the medicine; Apparently higher than 10% cyanogen insect amide SC and the plain SC of 10% ethyl multiple killing teichomycin, difference is extremely remarkable; The mu consumption is when being 14g/ mu and 16g/ mu, and 25 days seedling protecting effect is 89.76% and 90.42% after medication, roughly the same with 12g/ mu, and difference is not remarkable.Therefore, under the prerequisite of considering the mu cost, should advocate mu usage amount is 12g/ mu.

Claims (3)

1. an insecticide is characterized in that, said Pesticidal combination contains ethyl multiple killing teichomycin and two kinds of active components of cyanogen insect amide.

2. Pesticidal combination according to claim 1 is characterized in that, contains cyanogen insect amide 1%～40%, ethyl multiple killing teichomycin 1%～40%.

3. according to claim 1 or the described Pesticidal combination of claim 2, it is characterized in that said Pesticidal combination is processed suspending agent, water dispersible granules.