CN1303884C - Bacillus thuringiensis Comor subspecies aerosol and its preparation method - Google Patents

Abstract

The present invention relates to a smoking agent and a preparing method thereof, particularly to a smoking agent of the Comor subspecy of bacillus thuringiensis (Bt15A3) and a preparing method thereof. The abbreviation of the smoking agent is the Bt15A3 smoking agent, the smoking agent is also called a hot fog agent, and the Bt15A3 is a specificity microbial pesticide. The Bt15A3 smoking agent is characterized in that insect pest is killed by the toxic proteins and the spores of the bacillus thuringiensis. A plurality of manufacturers produce Bt initial powder and wetting powder in China, and smoke can not be sprayed. The present invention provides the Bt15A3 smoking agent and the preparing method thereof, and the Bt15A3 smoking agent is formed by dispersing and suspending the Bt15A3 initial powder in high-boiling diluting agent by an ultra fine pulverizing method under the help of various surface active agents. In use, very fine fog granules (more than 80 % of fog granules of 2 to 5 mu m) are sprayed by a smoking sprayer, and in a drifting process, the very fine fog granules can be firmly deposited on the leaves and the stems of crops for preventing the insect pest of the crops when the fog granules contact the crops. The present invention has the characteristics of high medical effect, low cost, a large quantity of fresh water saving and small polluted poison for environment and operators.

Description

The More of bacillus thuringiensis section subspecies aerosol and preparation method thereof

Technical field

What the present invention relates to is a kind of aerosol its preparation method, particularly relates to aerosol of the More of bacillus thuringiensis section subspecies (hereinafter to be referred as Bt15A3) and preparation method thereof.

Background technology

The More of section subspecies aerosol (also claiming thermal fog), Bt15A3 is a kind of specificity insecticide, main feature is: microorganism insecticide.Kill insect pest by its toxalbumin and gemma.In former powder of state-owned several manufacturer production Bt and wetting powder, this a kind of preparation can not be used for the aerosol spraying mist.Bt15A3 is mainly used in lepidoptera pests such as the fall webworm of control cotton bollworm, beet tops moth, diamond-back moth and fruit-bearing forest and gypsy moth at present.Because forest and fruit tree are taller and bigger, very difficult with the method for atomized water spray, and resistance of rainwater washing against not, preventive effect is low.Therefore the user is unwilling to use wetting powder and aqueous suspension pest control.The Bt15A3 aerosol still finds no product at present at home and abroad and comes out.The Bt15A3 aerosol that facts have proved in several years is a rising novel formulation.

Summary of the invention

A kind of Bt15A3 aerosol and preparation method thereof that provides of the present invention.The Bt15A3 aerosol is that the former powder of Bt15A3 is made in the high boiling point thinner by the method dispersion suspension of utmost point ultramicro grinding by the kinds of surface activating agent.In a single day eject superfine droplet (2-5 μ m accounts for more than 80%) with fog machine in use, in the drift process, contact crop and just can be deposited on firmly on crop leaf and the stem, be used to prevent and treat crop pest.The present invention have drug effect height, cost low, save a large amount of fresh water, and to environment and the little characteristics of operating personnel's pollution and toxic hazard.

The present invention includes following ingredients and percentage by weight:

Bt15A3 (40000 cotton bollworm IU/mg unit) 5-50%

Complexed surfactant 1-30%

Thinner 20-80%

Antifreezing agent 1-10%

The Bt15A3 aerosol is to include the aerosol of the former powder of the More of bacillus thuringiensis section subspecies as active component.

Complexed surfactant is: sodium metnylene bis-naphthalene sulfonate (NNO), methyl naphthalene sulfonate formaldehyde condensate (MF), benzyl naphthalenesulfonic acid-formaldehyde condensate (CNF), NaLS, sodium lignin sulfonate, calcium lignosulfonate, alkyl benzene calcium sulfonate (agricultural newborn 500#), alkylphenol polyoxyethylene (OP-4, OP-7), phenethyl phenol polyethenoxy ether (agricultural newborn 600#), alkylphenol polyoxyethylene formaldehyde condensation products (Nongru-700 #), castor oil polyoxyethylene ether (EL-40), secondary alkanol APEO (JFC), single oleic acid sorbitan ester (Span-80) and two kinds of organosilicon polymers (levelling agent 1#) or several mixing.

Complexed surfactant also can be: two kinds or several mixing in No. 1, NNO, MF, CNF, sodium lignin sulfonate, calcium lignosulfonate, No. 500, farming breast, agricultural emulsifier NO, Nongru-700 number, OP-4, OP-7, EL-40, JFC, Span-80, the levelling agent.

Thinner can be one or more the mixing in the alcohols (as diethylene glycol (DEG), triethylene glycol), the white carbon black of lightweight, bentonite, high Cen soil, diatomite of many alkyl-substituted aromatic hydrocarbons of boiling point more than 200 ℃ (as aromatic hydrocarbons No. 2, No. 3) atoleine hydrocarbon (as atoleine), dimerization trimerization.

Antifreezing agent is one or both the mixing of ethylene glycol or propane diols.

The present invention also can add known synergist, stabilizing agent or carry out compositely with other active ingredient, can improve the drug effect of Bt15A3 aerosol and the practicality on the agricultural greatly.

The preparation method of Bt15A3 aerosol of the present invention is as follows:

Press composition of raw materials with the former powder of Bt15A3, adding part surface activating agent and solid diluent carry out ultramicro grinding with airslide disintegrating mill and make 〉=325 purpose fine powders, get a certain amount of fine powder adding liquid diluent and surfactant then and stir into uniform oil suspension, add antifreezing agent again, after qualified after testing, can pack storing.

Outstanding substantial advantage of the present invention is:

1, makes the former powder of the Bt15A3 that can not find suitable solvent, promptly can not make the former powder of Bt15A3 of the aerosol of ordinary meaning, can make applicable aerosol by the present invention.The aerosol of ordinary meaning is that pesticide original medicine is dissolved in the high boiling solvent, form single phase soln, and the former powder of Bt15A3 does not have suitable high boiling solvent to dissolve, so can not make the aerosol of traditional sense.

2, strong ability to resist splash erosion.Conventional Bt aqua, wetting powder and aqueous suspension etc. need be converted a large amount of water sprays during use, its droplet can only partly deposit on crop, and it is a lot of to be lost.Meet rainwater immediately and also can be washed away even be deposited on droplet on the crop, and aerosol smoke particle of the present invention is deposited on back on the crop even fall torrential rain immediately and also do not wash away, and when spotting, also can spray.So strong ability to resist splash erosion is the outstanding advantage of Bt15A3 aerosol.

3, improved drug effect.Because smoke particle minimum (2-5 μ m accounts for more than 80%), it is little more a lot of than the particle (100-200 μ m) of water smoke.So wide coverage on crop.Therefore drug effect is higher more than 20% than ordinary preparation.

4, dispenser effect height, i.e. saving of work and time.Effect is 10 times of conventional spraying, so reduce the dispenser cost greatly.

5, poison little to environment and operating personnel.Conventional atomized water spray endangers seriously operating personnel during to tall and big dense planting crop spraying, and soup runs off in a large number in soil, pollutes.Spray aerosol, the people carries on the back fog machine and walks the front against the wind, and ejection smog in back does not have influence to operating personnel, and the smoke particle overwhelming majority is deposited on the crop, and is very little to environmental influence.

6, save a large amount of fresh water.Conventional atomized water spray as converting more than the water 200Kg/ mu, need not to convert water and spray aerosol in forest, every mu only needs spray 500-600 gram to get final product.Therefore can save a large amount of fresh water, especially particularly suitable to mountain area, hills and arid area.

Embodiment

Embodiment 1

Composition of raw materials: take by weighing Bt15A3 (40000 unit) 900Kg, add surfactant NNO 20Kg, MF 20Kg, calcium lignosulfonate 30Kg thinner diatomite 10Kg, bentonite 20Kg, in blending tank, mix, be crushed to 〉=325 purpose fine powders, take by weighing this fine powder 500Kg with airslide disintegrating mill, No. 500 2Kg of surfactant farming breast, agricultural emulsifier NO 1Kg, OP-41Kg, OP-71Kg, EL-40 2Kg, Span-80 1Kg, JFC 1.5Kg, No. 1 0.50Kg of levelling agent, triethylene glycol 200Kg, diethylene glycol (DEG) 100Kg, No. 2 180Kg of aromatic hydrocarbons, ethylene glycol 10Kg, add in the stirred tank, high-speed stirred makes it form a steady suspension, qualified after testing after, can pack storing.

Embodiment 2

Composition of raw materials: take by weighing Bt15A3 (40000 unit) 100Kg, surfactant NNO 100Kg, MF 10Kg, sodium lignin sulfonate 50Kg, calcium lignosulfonate 100Kg, CNF 40Kg, thinner diatomite 200Kg, bentonite 300Kg, high Cen soil 50Kg, the white carbon black 50Kg of lightweight mixes in a blending tank, is crushed to 〉=325 purpose fine powders with airslide disintegrating mill, take by weighing this fine powder 500Kg, No. 500 90Kg of surfactant farming breast, agricultural emulsifier NO 50Kg, OP-430Kg, OP-7 20Kg, EL-40 80Kg, Span-80 10Kg, JFC 18Kg, levelling agent 2Kg, No. 2 130Kg of thinner aromatic hydrocarbons, atoleine 10Kg, ethylene glycol 60Kg, add in the still of a band stirring, high-speed stirred makes it form a steady suspension, qualified after testing after, go into and can pack storing.

Embodiment 3

Composition of raw materials: take by weighing Bt15A3 (40000 unit) 800Kg, surfactant NNO 20Kg, CNF 40Kg, sodium lignin sulfonate 10Kg, calcium lignosulfonate 40Kg, thinner bentonite 90Kg, in a blending tank, mix, be crushed to 〉=325 purpose fine powders, take by weighing this fine powder 250Kg with airslide disintegrating mill, No. 500 20Kg of farming breast, agricultural emulsifier NO 5Kg, OP-4 30Kg, OP-7 8Kg, EL-40 5Kg, Span-80 10Kg, JFC 20Kg, No. 1 2Kg of levelling agent, No. 2 640Kg of aromatic hydrocarbons, ethylene glycol 10Kg adds in the still of a band stirring, and high-speed stirred makes it form a steady suspension, after qualified after testing, can pack storing.

Claims (6)

1. the More of bacillus thuringiensis section subspecies aerosol, it is characterized in that: it comprises following compositions and percentage by weight thereof:

Bt15A3 40000 5-50% 2000-20000 cotton bollworm IU/mg units of cotton bollworm IU/mg unit

Complexed surfactant 1-30%

Thinner 20-80%

Antifreezing agent 1-10%

Described Bt15A3 is that the desinsection parasporal crystal toxalbumin that produced of the More of bacillus thuringiensis section subspecies and gemma etc. are as active component.

2, the bacillus thuringiensis More of section subspecies aerosol according to claim 1, it is characterized in that: complexed surfactant is sodium metnylene bis-naphthalene sulfonate NNO, methyl naphthalene sulfonate formaldehyde condensate MF, benzyl naphthalenesulfonic acid-formaldehyde condensate CNF, sodium lignin sulfonate, calcium lignosulfonate, No. 500, alkyl benzene calcium sulfonate farming breast, alkylphenol polyoxyethylene OP-4, OP-7, the newborn 600# of phenethyl phenol polyethenoxy ether farming, alkylphenol polyoxyethylene formaldehyde condensation products Nongru-700 number, castor oil polyoxyethylene ether EL-40, secondary alkanol APEO JFC, two kinds or several mixing in No. 1, single oleic acid sorbitan ester Span-80 and the organosilicon polymer levelling agent.

3. the bacillus thuringiensis More of section subspecies aerosol according to claim 1 is characterized in that: thinner is solid diluent diatomite, bentonite, high Cen soil, lightweight white carbon; The mixing of one or more in the alcohols of the aromatic hydrocarbons that the many alkyl of liquid diluent replace, atoleine hydrocarbon, how halogen-substituted or dimerization trimerization.

4. the bacillus thuringiensis More of section subspecies aerosol according to claim 3 is characterized in that: liquid diluent is one or more the mixing in No. two, aromatic hydrocarbons, No. three, atoleine, white oil, o-dichlorohenzene, diethylene glycol (DEG) or the triethylene glycol.

5. the bacillus thuringiensis More of section subspecies aerosol according to claim 1 is characterized in that: antifreezing agent is one or both the mixing in ethylene glycol or the propane diols.

6. the preparation method of the bacillus thuringiensis More of section subspecies aerosol according to claim 1 is characterized in that it comprises the steps:

By the composition of raw materials metering the former powder of active component Bt15A3, solid diluent, surfactant are added evenly mixing in the blending tank, be crushed to through airslide disintegrating mill 〉=325 purpose fine powders.A certain amount of this fine powder, complexed surfactant, liquid diluent, antifreezing agent are added in the still that a band stirs, high-speed stirred makes it become uniform oil suspension again, packs accumulating after qualified after testing.