CN102308812A

CN102308812A - Insecticidal composition

Info

Publication number: CN102308812A
Application number: CN201110317499A
Authority: CN
Inventors: 刘晓娇; 王明康; 杨会营; 吴勇; 马嵩岳; 王占娣
Original assignee: Beijing Yanhua Yongle Pesticide Co Ltd
Current assignee: Yanhua Yongle (Leting) Biological Technology Co. Ltd.
Priority date: 2011-10-19
Filing date: 2011-10-19
Publication date: 2012-01-11
Anticipated expiration: 2031-10-19
Also published as: CN102308812B

Abstract

The invention relates to an insecticidal composition which comprises two active components, i.e., pymetrozine and thiantraniliprole. The insecticidal composition has a good control effect on rice hoppers and produces the beneficial effects of decreased usage amount, enlarged insecticidal spectrum, reduced labor cost, minimized environmental pollution and small possibility of generation of drug resistance.

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 pyrrole aphid ketone and thiophene insect amide.

Background technology

Pyrrole aphid ketone (Pymetrozine) belongs to pyridines or Triazinone insecticide, is the brand-new non-insects agent of killing livestock, and is developed in 1988 by Switzerland Ciba-Geigy company the earliest, and this product shows excellent control efficiency to the sucking pest of various crop.Utilizing electricity to penetrate figure (EPG) technology research shows; No matter be drop, feed or test injection, almost produce the lancet blocking effect immediately, stop to get food at once as long as aphid or plant hopper one touch pyrrole aphid ketone; And final hungry causing death, and this process is irreversible.Therefore, pyrrole aphid ketone has excellent blocking-up insect and passes malicious function.

The thiophene insect amide is the novel heterocycle benzamide compound of being found in initiative in 2009 by the Jiangsu Pesticide Research Institute Co., Ltd that faces, to rice fulgorid, beet armyworm.Lepidopterous insects such as prodenia litura, cotton bollworm, striped rice borer have high activity.

Because agricultural pests causes very big loss to crops production every year, considers the agricultural chemicals of long-term use single variety, impels insect to produce resistance easily; Environment is caused bigger pollution, and field trial shows, the existing medicament another kind of mixed pesticide different with mechanism of action; Can not only postpone resistance and produce, can also improve drug effect and residual period, reduce usage amount; Reduce cost, so we are with thiophene insect amide and Pyraphione compound, improve insecticidal effect; Enlarge insecticidal spectrum, reduce environmental pollution simultaneously, reduce the dispenser cost.

Summary of the invention

The purpose of this invention is to provide a kind of high-efficiency low-toxicity, lasting effect is long, quick-acting is high, the Pesticidal combination of environmental protection.Concrete relate to pyrrole aphid ketone and the thiophene insect amide is the pesticidal preparations of basis.

Above-mentioned Pesticidal combination contains pyrrole aphid ketone and thiophene insect amide ratio is 1: 50～50: 1.

Utilize above-mentioned described Pesticidal combination, 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. high-efficiency low-toxicity; 2. quick-acting, hold to imitate and take into account; 3. noresidue, nuisanceless, environmentally safe; 4. use compound formulation, two kinds of active ingredients also have synergistic effect, and consumption reduces during all than single use, thereby have improved the insecticidal effect of active ingredient, have increased safety, have reduced spraying times.

Embodiment

Below concrete proportioning 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 pyrrole aphid ketone and the several formulations product of thiophene insect amide under 1: 50～50: 1 ratio therefrom select several kinds of representational ratios (1: 50,1: 25,1: 10,1: 1,10: 1,25: 1,50: 1) to carry out the indoor biometrics experiment.

Rice hoppers belongs to Insecta Homoptera (Homoptera) Delphacidae (Delphacidae) insect, popular name fire midge worm.Inhale the plant juice crops such as paddy rice of causing harm with thorn.Frequent species has brown planthopper (Nilaparvata lugens), white-backed planthopper (Sogatella furcifera) and small brown rice planthopper (Laodelphax striatellus).Rice fulgorid is caused harm to paddy rice, removes directly thorn suction juice, makes growth retardation, and the rice clump is agglomerating withered when serious, even outside the dead stalk lodging in full field, lays eggs and also can stab plant, and the destruction conducting tissue hinders the nutriment transportation and the viral disease that spreads disease.Pyrrole aphid ketone and thiophene insect amide are two kinds of compositions 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 hoppers.

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 rice fulgorid larva, each concentration is handled about 30 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 30 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 proportionings of table 1 are to the toxicity test result of rice fulgorid

Analyze above-mentioned data result and show, when pyrrole aphid ketone and thiophene insect amide different proportion are composite, each proportioning co-toxicity coefficient all greater than 120, have obvious synergistic effect.Wherein the synergistic effect of proportioning 4 and proportioning 5 is the most obvious, and its co-toxicity coefficient is respectively 163.93 and 151.25.

Through the indoor biometrics test, select the field trial that the less proportioning 1 of the bigger proportioning of CTC 4, proportioning 5 and CTC is prevented and treated rice fulgorid, wherein proportioning 1, proportioning 4, proportioning 5 are added according to following active ingredient respectively:

Prescription one (proportioning 1): 51% water dispersible granules

Pyrrole aphid ketone 1%

Thiophene insect amide 50%

Prescription two (proportionings 4): 10% suspending agent

Pyrrole aphid ketone 5%

Thiophene insect amide 5%

Prescription three (proportionings 5): 22% suspending agent

Pyrrole aphid ketone 20%

Thiophene insect amide 2%

Confirm the effect of each prescription control rice fulgorid; Simultaneously through with the effect comparison of pyrrole aphid ketone, the agent of thiophene insect amide list, verify the synergistic effect after composite.Concrete test method and data are following:

Test the test of pesticide effectiveness that one: 10% pyrrole aphid ketone thiophene insect amide SC, 22% pyrrole aphid ketone thiophene insect amide SC, 51% pyrrole aphid ketone thiophene insect amide WDG do the field control rice fulgorid, use 10% pyrrole aphid ketone SC and 10% thiophene insect amide SC simultaneously as contrast.City east Ma Fangzhen is answered for the Xiaogan Prefecture, Hubei Province in the test place, and the time is on July 19th, 2010, 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 bat dish method metering nymph 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 10% pyrrole aphid ketone thiophene insect amide SC and other chemical control rice fulgorids

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: Yingcheng City, Hubei

Can find out from above data; Under the situation of identical using dosage; 25d behind medicine; The control rate of 10% pyrrole aphid ketone thiophene insect amide SC, 22% pyrrole aphid ketone thiophene insect amide SC reaches 86.1% and 84.8% respectively, the effect when being higher than 10% pyrrole aphid ketone SC and 10% thiophene insect amide SC list agent use far away, and difference is extremely remarkable.Simultaneously, 51% pyrrole aphid ketone thiophene insect amide WDG 25d after medication, its control efficiency to rice fulgorid on the vegetables has also reached 79.3%, and the preventive effect when only using a kind of single agent is significantly improved.Simultaneously, above-mentioned field trial also match (CTC is big more, and synergistic effect is big more) with the indoor biometrics test for data.

This shows that prescription two is best with the control efficiency of prescription three, wherein, the seedling protecting effect of prescription two is a little more than prescription three, so think that prescription two is best.

10% pyrrole aphid ketone thiophene insect amide SC (prescription two) is carried out further test, filtered out the optium concentration of control rice fulgorid.Experimental scheme 10g/ mu, 12g/ mu, 14g/ mu and 4 concentration gradients of 16g/ mu are also done contrast with the effect of 10% thiophene insect amide SC (12g/ mu), 10% pyrrole aphid ketone 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 two different amounts control rice fulgorid effect table

Can find out that from the result of the above-mentioned test of pesticide effectiveness along with the increase of prescription dosage, drug effect also increases to some extent; 10% pyrrole aphid ketone thiophene insect amide SC consumption is a 12g/ mu; The seedling protecting effect of 25d is 83.9% behind the medicine, and apparently higher than 10% thiophene insect amide SC and 10% pyrrole aphid ketone SC, difference is extremely remarkable.The mu consumption is when being 14g/ mu, and 25 days seedling protecting effect has reached 86.7% after medication, and apparently higher than mu consumption 10g/ mu and 12g/ mu, and after the mu consumption risen to 16g/ mu, seedling protecting effect is 87.4%, and was not remarkable with the difference of 14g/ mu.Therefore, under the prerequisite of considering the mu cost, should advocate mu usage amount is 14g/ mu.

Claims

1. a Pesticidal combination is characterized in that, said Pesticidal combination active component is made up of pyrrole aphid ketone and thiophene insect amide.

2. Pesticidal combination according to claim 1 is characterized in that, pyrrole aphid ketone and thiophene insect amide ratio are 1:50-50:1.

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