CN103798298A - Method for preparing biopesticide - Google Patents

Abstract

The invention discloses a method for preparing biopesticide. The method comprises the following steps: firstly, preparing a tripterygium wilfordii extract, namely, cleaning roots of tripterygium wilfordii, drying, crushing, subsequently extracting with a 95% ethanol solvent according to a weight volume ratio of 1g:10ml by using a Soxhlet extraction method, concentrating the extract liquid so as to obtain the solid tripterygium wilfordii extract; secondly, reasonably proportioning the tripterygium wilfordii extract with tea cake, namely, according to biologic measurement on indoor tea geometrid, and determining an appropriate proportion of allowing the cotoxicity coefficient of the two effective components to be greater than 150l; selecting a dispersing agent or an emulsifying agent, namely, selecting an appropriate dispersing agent and emulsifying agent by using a pesticide compounding technique so as to increase the dispersity and the field prevention and treatment effect of a product; selecting a packing or a solvent, namely, selecting the appropriate packing or organic solvent for processing the product according to chemical properties and application requirements of the effective components; and finally preparing the biopesticide. The biopesticide produced by using the method has the advantages of short production period, high medicine component content, no environment pollution in the production process and the like, and the tripterygium wilfordii resource can be sufficiently developed and utilized.

Description

A kind of preparation method of biopesticide

Technical field:

The present invention relates to a kind of biopesticide and preparation method thereof.

 

Background technology:

Threatened by the insects such as tea geometrid, tea false eye leafhopper, tea caterpillar, the black poison moth of tea, mite class, the loss causing because of insect pest every year on average reaches 10～20%, and wherein tea geometrid (Ectropis obliqua Prout) is the most serious in the harm whole year.Tea geometrid eats leaf, occurs when serious tea place in blocks to eat up with larva, has a strong impact on tea yield and growth of tea plant.Because the effective biopesticide kind for tea geometrid is little, tea grower substantially mostly is to rely on and reduces the consumption of chemical pesticide or avoid preventing and treating tea geometrid with the chemical pesticide of high residue as far as possible, and result is still difficult to ensure demonstrate,proves that tealeaves agriculture is residual not to exceed standard and the quality of tealeaves.

Thunder godvine is that thunder godvine is Wei Yu section Thunder God Calamus bejuco, is distributed in the provinces such as south China Fujian, Jiangxi, Zhejiang, Hubei, Hunan, Guangdong, Taiwan, is precious medicinal plant.Thunder godvine purposes is extremely wide, and its radical center part, for medicine, is also the splendid plant of botanical pesticide, and Gen Pi and ground branches and leaves are for the production of biopesticide, and remaining residue can be processed into fertilizer, has very high economic worth.Shennong's Herbal meaning: degasification scabies is disturbed, desinsection fish, raw mountain valley.Compendium of Material Medica meaning: root is poison especially.Immersion is as realgar look, and air exhaustion is smelly.In garden stain with desinsection, use quite and, its leaf also poison, be as good as with gelsemium elegan.Velamen of Tripterygium wilfordii is the insecticidal materials of China's folk tradition, crushed material or extract have strong stomach toxicity to the multiple agricultural fruit tree pest insect such as cabbage caterpillar, diamond-back moth, can causing food refusal or play anesthetic effect, is widely used insecticide in China river, Yi Dai vegetable garden, Zhejiang.Thunder godvine is developed as to biopesticide, can be for the production of pollution-free vegetable, organic tea, Pollution-free Fruit, GAP medicinal material etc., thus obtain the food of " safety, high-quality, true, controlled ".Through State Intellectual Property Office's patent retrieval, the patent announcement of preparing biopesticide take thunder godvine as raw material has 10, has wherein authorized 2, the patent of preparing separately agricultural chemicals take thunder godvine as raw material has 3, be " application of thunder godvine extract preparation in agriculture and forestry injurious insect control " of Zhejiang Medicine Co's invention, " application of the non-water extract of thunder godvine in agricultural chemicals preparation " of Lushiji Bio-Engineering Co Ltd, Wuhan's invention and " tripterygium insecticide and the manufacture method thereof " of Nuisanceless Pesticide Research Service Center, Xibei Agroforestry Science and T's development, there are 7 take thunder godvine as raw material and with the patent of other material combination, wherein compatibility raw material mainly contains kuh-seng, the Chinese pulsatilla, stemonine, the root of langdu, Li Lu, tobacco etc.But the patent of the thunder godvine biopesticide take the withered element of tea as compatibility raw material has no report.

The object of the invention is to, take thunder godvine and the withered element of tea as raw material, provides biopesticide of a kind of low cost, wide spectrum, synergy and natural plant and preparation method thereof.

The present invention adopts aseptic extraction in thunder godvine organism leaching process, extraction solvent is water, extracts temperature and is less than 49 ℃, and extraction time is greater than 50 hours, and requirement employing vapor tight tank is airtight and constantly rotate extraction vessel in leaching process, to accelerate separating out of extract.

 

Summary of the invention:

Provide a kind of after adding the vegetalitas synergist that aboundresources, price are lower, can significantly improve Pests of Tea-Plants tea geometrid control efficiency, tripterygium wilfordii compound insecticidal preparation that quick-acting is high.

The object of the invention is achieved by the following technical programs.

A kind of biopesticide, it is characterized in that with thunder godvine plant extracts and the withered plain compatibility of tea, through certain process, the significant percentage example of each component is: thunder godvine crude extract 0.8-25%, the withered plain 1-10% of tea, dispersant 2-12%, emulsifier 3-13%, solvent or filler complement to 100%, described dispersant is sodium lignin sulfonate, described emulsifier is neopelex, and described solvent is organic solvent dimethylbenzene, and described filler is diatomite.

The preparation method of biopesticide is realized by following steps:

Press after the formula weighing of compounded pesticides, by thunder godvine crude extract, the withered element of tea, dispersant, emulsifier and solvent or filler, after stirring, mix with general method, can be mixed with a kind of biopesticide.

Concrete steps are as follows: first, the preparation of thunder godvine crude extract: the root of thunder godvine is cleaned, dry, pulverize after with 95% alcohol solvent by weight volume be 1 gram: 10 milliliters of ratios, extract with soxhlet extraction, after extract is concentrated, obtain solid-state thunder godvine crude extract;

Secondly, the reasonable assembly of thunder godvine crude extract and the withered element of tea: by the indoor biologicall test to tea geometrid, the appropriate proportioning of the co-toxicity coefficient of two kinds of active ingredients of definite employing more than 150;

Then, the screening of dispersant or emulsifier: utilize the compounded technology of agricultural chemicals, screen suitable dispersant, emulsifier, to increase dispersive property and the field control effect of product;

Again secondly, the screening of filler or solvent: according to the chemical property of active ingredient and instructions for use, screen suitable filler or organic solvent and carry out the processing of product;

Finally, the preparation of medicament: 1. missible oil: by proportioning, two kinds of active ingredients are fully dissolved with solvent in container, add emulsifier, be creaming agent product after stirring, filtration, detection, packing; 2. wetting powder: by proportioning, two kinds of active ingredients are fully mixed with filler in container, add dispersant, stir, complete the production of product through last handling processes such as air-flow crushings, carry out the detection of active ingredient, packing.

Beneficial effect of the present invention: though little to the toxic action of tea geometrid larvae through testing the withered element of clear and definite tea itself, composite with triperygium wilfordii extractive preparation after, can significantly improve the control efficiency to tea geometrid larvae.

 

Embodiment:

By following examples, the present invention is described in further detail, but the present invention is not limited by these contents.

With thunder godvine plant extracts and the withered plain compatibility of tea, through certain process, the significant percentage example of each component is: thunder godvine crude extract 0.8-25%, the withered plain 1-10% of tea, dispersant 2-12%, emulsifier 3-13%, solvent or filler complement to 100%, described dispersant is sodium lignin sulfonate, described emulsifier is neopelex, described solvent is organic solvent dimethylbenzene, and described filler is diatomite.

First, the preparation of thunder godvine crude extract: by the root cleaning, drying of thunder godvine, pulverize after with 95% alcohol solvent by weight volume be 1 gram: 10 milliliters of ratios, extract with soxhlet extraction, after extract is concentrated, obtain solid-state thunder godvine crude extract;

Secondly, the reasonable assembly of thunder godvine crude extract and the withered element of tea: by the indoor biologicall test to tea geometrid, the appropriate proportioning of the co-toxicity coefficient of two kinds of active ingredients of definite employing more than 150;

Then, the screening of dispersant or emulsifier: utilize the compounded technology of agricultural chemicals, screen suitable dispersant, emulsifier, to increase dispersive property and the field control effect of product;

Again secondly, the screening of filler or solvent: according to the chemical property of active ingredient and instructions for use, screen suitable filler or organic solvent and carry out the processing of product;

Finally, the preparation of medicament: 1. missible oil: by proportioning, two kinds of active ingredients are fully dissolved with solvent in container, add emulsifier, be creaming agent product after stirring, filtration, detection, packing; 2. wetting powder: by proportioning, two kinds of active ingredients are fully mixed with filler in container, add dispersant, stir, complete the production of product through last handling processes such as air-flow crushings, carry out the detection of active ingredient, packing.

Claims (1)

1. the preparation method of a biopesticide, it is characterized in that with thunder godvine plant extracts and the withered plain compatibility of tea, through certain process, the significant percentage example of each component is: thunder godvine crude extract 0.8-25%, the withered plain 1-10% of tea, dispersant 2-12%, emulsifier 3-13%, solvent or filler complement to 100%, described dispersant is sodium lignin sulfonate, described emulsifier is neopelex, described solvent is organic solvent dimethylbenzene, described filler is diatomite, and concrete steps are:

First, the preparation of thunder godvine crude extract: by the root cleaning, drying of thunder godvine, pulverize after with 95% alcohol solvent by weight volume be 1 gram: 10 milliliters of ratios, extract with soxhlet extraction, after extract is concentrated, obtain solid-state thunder godvine crude extract;

Secondly, the reasonable assembly of thunder godvine crude extract and the withered element of tea: by the indoor biologicall test to tea geometrid, the appropriate proportioning of the co-toxicity coefficient of two kinds of active ingredients of definite employing more than 150;

Then, the screening of dispersant or emulsifier: utilize the compounded technology of agricultural chemicals, screen suitable dispersant, emulsifier, to increase dispersive property and the field control effect of product;

Again secondly, the screening of filler or solvent: according to the chemical property of active ingredient and instructions for use, screen suitable filler or organic solvent and carry out the processing of product;

Finally, the preparation of medicament: 1. missible oil: by proportioning, two kinds of active ingredients are fully dissolved with solvent in container, add emulsifier, be creaming agent product after stirring, filtration, detection, packing; 2. wetting powder: by proportioning, two kinds of active ingredients are fully mixed with filler in container, add dispersant, stir, complete the production of product through last handling processes such as air-flow crushings, carry out the detection of active ingredient, packing.