Fosthiazate Avermectin granular formulation for killing nematode
Technical field the invention belongs to a kind of Recompounded pesticide, relates to formulation of pesticide and preparation technique.
Composite between the background technology agricultural chemicals can be improved drug effect, the expanding prevention scope, reduce toxicity of pesticide and control cost, overcoming and delay insect and develop immunity to drugs, is pesticide new variety research and development direction (" farmland agriculture chemical compounding technology ", Henan science tech publishing house; " new Recompounded pesticide and application technology thereof ", Beijing agricultural 1996 (3)).
Plant nematode is the important causal organism in the crops pest.The nematode decapacitation directly causes can also propagate multiple pathogenic microorganism outside the plant disease, particularly virus.Whole world crop is caused harm because of plant nematode and causes average loss more than 10%.The China nematode is caused harm very serious, can make the peanut underproduction 30~0% generally speaking; The soybean underproduction 10~20%; The paddy rice underproduction 10%.Can make the peanut underproduction 70~80% when serious, even total crop failure; The soybean underproduction 30~50%; The paddy rice underproduction 40~50%, and harm be on the rise (generation of groundnut root knot nematode disease and control, Hebei agricultural science and technology 2006 (6)).Particularly because the rapid expansion of China's protection ground vegetables area; annual uninterrupted plantation causes a large amount of accumulation of nematode and other pathogenic microorganism; cause the vegetables underproduction 20~30%; quality of vegetable and outlet have also seriously been influenced; serious threat protection ground vegetables and is produced (generation of root knot nematode disease and control, Tianjin agricultural science and technology 2003 (3)).
The nematocide that uses mostly is organic phosphor and carbamic acid lipid greatly at present, all belong to high-toxic pesticide as Aldicarb, carbofuran, Nemacur etc., alternative low-toxin farm chemicals kind is few, nematode easily develops immunity to drugs, and compatibility extreme difference with environment, polluted soil and water resource (nematode cause harm and the nematode killing agent present situation how?, China's farmingization service network).
Fosthiazate (fosthiazate), it is many etc. to have another name called colophonate, lythidathion, happy lot, is a kind of organophosphorus insecticides and nematocide, and the main mode of action is to suppress the acetylcholinesterase of target pest, influences the ecology of second larval phase.Be used to prevent and treat thrips, Lepidoptera, coleoptera, the many insects of diptera, also very effective to underground insect; Various nematodes are had the good activity of killing, and common insecticide is produced resistant insect has good interior suction to kill activity.This medicament allows to use on fruit and vegetables for poisoning.Avermectin (Abamectin) is the microbial source broad spectrum pesticide, and root-knot nematode, stem eelworm are all had good preventive and therapeutic effect, is the desirable medicament that replaces Celfume.Fosthiazate and abamectin compounded granule do not appear in the newspapers (Ministry of Agriculture agriculture chemical registration bulletin and State Intellectual Property Office website).
Summary of the invention
The objective of the invention is, overcome the deficiency of prior art, provide a kind of and new make carrier with soybean-cake flour, with organophosphorous pesticide-fosthiazate and microbial pesticide-Avermectin is the nematicide pesticidal preparations of main active ingredient, and nematicide agricultural chemicals novel formulation of the present invention has efficiently, low toxicity, low-residual, do not pollute agricultural product and environment, have advantages such as fertilizer efficiency concurrently.
Technical solution of the present invention be with by soybean through the oil expression after soybean-cake flour and fosthiazate, Avermectin be main active ingredient, be equipped with binding agent, pH value conditioning agent, colouring agent and mix, utilize the extruded type comminution granulation to be processed into fosthiazate Avermectin granular formulation for killing nematode by proper proportion.Soybean-cake flour through pulverizing itself also contains plant nutrient substance N (5-7%), P (1.1%) and K (1.5%) both as the carrier of active ingredient.Therefore, fosthiazate Avermectin granular formulation for killing nematode also has the fertilizer efficiency effect in the control nematode.Utilize technical scheme of the present invention, can reach purpose of the present invention.
The feature of granule preparation of nematicide of the present invention is that said granular preparation contains (in weight %): fosthiazate 1~10; Avermectin 0.1~5; Binding agent 5~20; PH regulator agent 0.01~0.5; Pigment 0.1~2.0; Surplus is a soybean-cake flour.
Said binding agent is a starch; The pH regulator agent is an acetic acid; Pigment is a crystal violet; Soybean-cake flour is that soybean was pulverized 40 mesh sieves after extracting oil.
Fosthiazate Avermectin granule preparation of nematicide adopts conventional granular pesticide extrusion molding granulation processing technology to get final product in preparation process.
Compare with prior art, the present invention has following advantage and good effect:
1, both are composite has significant synergies to killing Plant nematode;
2, efficient, low toxicity, low-residual do not pollute agricultural product and environment;
3, insecticidal spectrum is wide, and various nematodes are all had good control efficiency;
4, in the control nematode, also has the fertilizer efficiency effect;
5, open medication on the ground changes underground closed medication into, and the decomposition of minimizing pesticide active ingredient and agricultural chemicals are to the injury effect of beneficial organism.
Embodiment
Plant nematode is generally from soil infringement plant roots, even the nematode of its part that causes harm as wheat anguina, has at least a stage (generally being the stage of infecting) to live in the soil.So product of the present invention is the granule that imposes in the soil, thereby reduce the insect density of nematode in soil.
We have adopted following four kinds of methods to carry out biologicall test: the outer directly biologicall test of (1) pin main body, promptly the plant nematode of directly handling variety classes, different developmental phases with fosthiazate, Avermectin and both various proportionings is calculated the lethal concentration of 50 (LC
50) or lethality; (2) mensuration nematode after treatment is to the penetration power of plant root; (3) measure root nematode ovum incubation rate after treatment and hatching back larva penetration power to plant root.(4) the various proportionings with fosthiazate and Avermectin are processed into granule, directly handle the root-knot nematode in the soil, calculate the lethal concentration of 50 (LC of various proportionings
50), calculate synergistic effect, find out best proportioning.
By field efficacy sub-district screening test, find out fosthiazate Avermectin granular formulation for killing nematode to the control efficiency of root knot nematode, optimum amount, to safety of vegetables etc., determine its technology for safely applying.
Carried out the indoor virulence screening test with nematode, with fosthiazate: Avermectin 40: 1,30: 1,20: 1,10: 1 totally 4 proportionings handle, result of the test finds out that mixed co-toxicity coefficient is respectively 211,262,185,177, and co-toxicity coefficient shows fosthiazate: synergy is the most remarkable during 30: 1 proportionings of Avermectin.Co-toxicity coefficient reaches 262 (co-toxicity coefficient is synergy greater than 100, and big more synergy is remarkable more).
Field control effectiveness test as controlling object, is established 10% fosthiazate Avermectin granule 1kg, 1.5kg, 2kg/ mu with tomato root-knot eelworm, when tomato is transplanted, spreads manuer in holes.Result of the test shows that 10% fosthiazate Avermectin granule has the better prevention effect to tomato root-knot eelworm, and control efficiency reaches more than 65%.
Embodiment 1
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 20, and Avermectin 0.1, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 20.1% fosthiazate Avermectin granular formulation for killing nematode.
Embodiment 2
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 15, and Avermectin 0.2, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 15.2% fosthiazate Avermectin granular formulation for killing nematode.
Embodiment 3
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 9.7, and Avermectin 0.3, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 10% fosthiazate Avermectin granular formulation for killing nematode.
Embodiment 4
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 8, and Avermectin 1, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 9% fosthiazate Avermectin granular formulation for killing nematode.
Embodiment 5
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 5, and Avermectin 2, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 7% fosthiazate Avermectin granular formulation for killing nematode.
Embodiment 6
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 3, and Avermectin 3, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 6% fosthiazate Avermectin granular formulation for killing nematode.
Embodiment 7
Each constituent content of granular formulation for killing nematode of the present invention (in weight %) is: fosthiazate 1, and Avermectin 5, starch 10, acetic acid 0.1, crystal violet 0.5, surplus is a soybean-cake flour, makes concentration and be 6% fosthiazate Avermectin granular formulation for killing nematode.
Preparation of the present invention (embodiment 3, and content is 10%) is to the control efficiency of tomato root-knot eelworm:
Medicament |
Using dosage |
Proofread and correct preventive effect (%) |
Fosthiazate Avermectin granular formulation for killing nematode |
2kg/ mu |
80.6 |
Fosthiazate Avermectin granular formulation for killing nematode |
1.5kg/ mu |
75.5 |
Fosthiazate Avermectin granular formulation for killing nematode |
1kg/ mu |
65.8 |