CN101015297A - Biological insecticide with synergistic effect and preparing method thereof - Google Patents

Abstract

The invention relates to a biocide and the preparing method. Said biocide comprises: avermectin 1.1- 1.5%, neem 0.05- 0.5%, auxiliary agent 2- 25%, packing material 73.5- 97.8%, the proportion is weight proportion; auxiliary agent and packing material are added into avermectin and neem to produce suspending agent; the auxiliary agent of said suspending agent comprises wetting dispersing agent 1- 15%, anti- freezing agent 1- 3%, thickening agent 0.05- 2%, and defoaming agent 2- 5%. The biocide is widely used in rice, fruit trees and vegetable for insects prevention, and is characterized by low cost, good effect, convenient production and building effect to prevention object.

Description

A kind of biological insecticides and preparation method thereof with synergistic function

Technical field

The present invention relates to a kind of biological insecticides and preparation method thereof, relate to composite biological insecticides of a kind of plant resource with synergistic function and antibiotic and preparation method thereof specifically

Background technology

As everyone knows,, seek to reduce the risk that agricultural chemicals and use thereof bring, become the much-talked-about topic of formulation art by the innovation of preparation technique along with pesticide hazards problem and people become increasingly conspicuous to the concern of living environment.Many agricultural chemicals experts point out after looking back the problem that relevant pest resistance to insecticide administers, the skewness of agricultural chemicals be since the operation technique and the formulations of pesticide be not suitable for cause; And emphasize in pesticide resistance comprehensive regulation strategy from now on, must be the formulations of pesticide and technique in using agriculture chemical necessary component as resistance management research.Have research to point out, as the actual dose that is subjected in the pest target, approximately be no more than 6% of field dosage in extensive farmland dispenser process, be no more than 0.1% but most applications is next, greatly part is all missed the target.In view of this, cause the main cause of current agricultural chemicals environmental problem also not exclusively to be to be unfavorable formulation and operation technique to a great extent by agricultural chemicals itself.The factor of technical development simultaneously is to promote the most direct influence factor of pesticide greening purification.Technology such as the suspending agent of developing in recent years, the agent of kind clothing, microcapsule formulations, microemulsion, water dispersible granules are based on the effective way of modern preparation processing technology pesticide greening purification.Suspending agent is in the main trend that reduces consumption of organic solvent, uses and store and transport safe ready, the lasting period is long, the characteristics that do not produce aspects such as " three wastes " in producing have been complied with pesticide greening purification.From above-mentioned meaning, be the water-base preparation of representative with the suspending agent, will become one of important means that solves the pesticide hazards problem.Suspending agent (suspension concentration) claim aqueous suspension agent, colloidal suspending agent, concentrated suspension again, is the important formulation of a class of the contemporary farm chemical preparation technology developing direction of representative.Its basic principle is under surfactant and other promoter effects, and former medicine insoluble or that be insoluble in water is distributed in the water, forms uniform and stable thick suspension system.Suspending agent is mainly adjusted agent, defoamer and water etc. by pesticide original medicine, wetting agent, dispersant, thickener, antifreezing agent, pH and is formed.Because its dispersion medium is water, cost is low so suspending agent has, production, storing and characteristics such as safe in utilization, and can mix with arbitrary proportion with water, not influenced by water quality, water temperature, and is easy to use.Compare with the formulations of pesticide that with the organic solvent are medium, have advantages such as the little and poisoning of environmental influence are light.

Avermectin and nimbin all are that present range of application is wide, the comparatively effective biological insecticides of control.

Nimbin is the vegetable insecticide that extracts from seal chinaberry seed, insect has food refusal, avoid keep away, interior suction and the inhibition effect of growing.Mainly act on the endocrine system of insect, reduce the burst size of moulting hormone; Also can directly destroy epidermal structure or stop the chitinous formation of epidermis, or disturb respiratory metabolism, influence genital system growth etc.Safer to environment, people and animals, natural enemy, insect is difficult for developing immunity to drugs.Nimbin is a biopesticide, and drug effect is slower, but the lasting period is long.

Avermectin is a kind of macrolide disaccharide compounds.Be the natural products that from edaphon, separates, insect and mite class had tag and stomach poison function and faint fumigation action is arranged, no systemic action.But it has very strong osmosis to blade, can kill subepidermal insect, and the longevity of residure is long.It does not kill ovum.What its mechanism of action was different with general insecticide is that it disturbs the neurophysiology activity, stimulate and discharge the r-aminobutyric acid, and the r-aminobutyric acid has inhibitory action to arthropodan nerve conduction, the one-tenth of mite class, if mite and insect with larva with paralysis symptom promptly appears after medicament contacts, inertia is not got food, and is dead after 2-4 days.Because of not causing that insect dewaters rapidly, so its lethal effect is slower.But though predatism and parasite are had direct killing effect, because of plant surface is residual few, therefore little to the damage of beneficial insect.But Avermectin and nimbin all are based on the missible oil formulation in the market, product cost height not only, and drug effect is poor, and has caused serious environmental to pollute and the excess waste of resource in the product use.

Summary of the invention

The objective of the invention is at above-mentioned weak point, providing a kind of is novel form with the suspending agent, has the plant resource and the composite biological insecticides of antibiotic of synergistic function simultaneously.Another object of the present invention provides this process for preparing bio-insecticide.

Technical scheme of the present invention is achieved in that a kind of biological insecticides with synergistic function, it is characterized in that described insecticide is to add auxiliary agent and filler is made suspending agent in active ingredient Avermectin and nimbin, the preparation raw materials by weight is Avermectin 0.1-1.5%, nimbin 0.05-0.5%, auxiliary agent 2-25%, filler 73.5-97.8%.

The auxiliary agent of described suspending agent is by wetting dispersing agent 1-15%, antifreeze 1-3%, and thickener 0.05-2%, defoamer 2-5% forms.

Described wetting dispersing agent can adopt one or more the mixture in polyoxyethylene triphenylethylene phosphenylic acid salt, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene, the polyoxyethylene nonylphenol ether (NP-9).

Described antifreeze adopts alcohols.

Described thickener adopts water-soluble high-molecular substance xanthans or aluminium-magnesium silicate.

Described defoamer adopts silicone based defoamer.

Described filler is that white carbon black mixes with water.

A kind of process for preparing bio-insecticide with synergistic function may further comprise the steps:

(1) fully mixes by said ratio weighing Avermectin, nimbin, wetting dispersing agent, antifreeze and part water, be transferred in the sand mill and grind;

(2) with thickener and the water ratio mixed dissolution with 1: 50, silicone defoaming agent and filler water fully mix, and join in the material that is grinding according to the aforementioned proportion amount of getting.

(3) in the process of grinding, just add proper quantity of defoaming agent as foam, till adding the aforementioned proportion consumption.

(4) after sand mill fully grinds, discharging promptly gets this product.

Biological insecticides with synergistic function are used in each class pest such as control paddy rice, fruit tree, vegetables, to crop safety, cost is low, preventive effect good.Prove that after tested biological insecticides chemical property of the present invention is stable, synergy is remarkable, and controlling object is shown tangible synergy and complementation.

The advantage of these biological insecticides: 1, two kinds of combination of active principles are used, and make its mode of action complementation, have enlarged insecticidal spectrum.2, have synergistic effect, through test determination: Avermectin and nimbin combination biological insecticides, its co-toxicity coefficient reaches 210, and control efficiency obviously is better than other chemical pesticide commonly used at present.Especially with Avermectin 0.9%, nimbin 0.2%, synergy is the most remarkable.3, use cost reduces, and Avermectin and nimbin cost are higher at present, and the independent result of use of missible oil formulation low dosage is not again fine, and Avermectin and nimbin are used in combination the preventive effect height, and cost is low.

Embodiment

Further narrate the present invention below in conjunction with embodiment.

Embodiment: 1.1% Avermectin nimbin suspending agent

Get raw material by weight percentage:

Avermectin 0.9%

Nimbin 0.2%

Polyoxyethylene nonylphenol ether (NP-9) (wetting dispersing agent) 8%

Propane diols (antifreeze) 2%

Xanthans (thickener) 0.5%

Silicone defoaming agent (SAG612) 1%

Water (filler) 87.4%

Be prepared according to the following steps:

1, fully mixes by said ratio weighing Avermectin, nimbin, polyoxyethylene nonylphenol ether (NP-9) (dispersion moisture agent), propane diols (antifreeze) and part water, be transferred in the sand mill and grind.

2, with xanthans (thickener) and the ratio mixed dissolution of water with 1: 50, silicone defoaming agent (SAG612) fully mixes with filler water, joins in the material that is grinding according to the aforementioned proportion amount of getting.

3, in the process of grinding, just add proper quantity of defoaming agent as foam, till adding the aforementioned proportion consumption.

4, after sand mill fully grinds, discharging promptly gets this product.

As follows through the test statistics drug effect:

75 milliliters/mu in the preparation that is made into according to the above ratio, 100 milliliters/mu, 150 milliliters of/mu preventive effects to paddy rice three generations paddy stem borer more than 78%, more than 85%, are better than single agent to the preventive effect of rice leaf folder.

The effect (Jinhu County, Jiangsu) of 1.1% Avermectin nimbin suspending agent control paddy rice three generations paddy stem borer

Handle	The investigation spike number	The dead ears number	Dead ears rate (%)	Preventive effect (%)	LSR
							5％	1％
					75 milliliters/mu	480.50			6.75	1.40	78.1	C	C
100 milliliters/mu	486.50	4.75	0.98	80.4			B	AB
					150 milliliters/mu	481.50			3.50	0.73	85.4	A	A
0.3% nimbin emulsion (45 milliliters/mu)	483.75	5.75	1.19	76.2			C	BC
					1.8% abamectin emulsifiable concentrate (20 milliliters/mu)	487.50			9.50	1.95	61.1	D	D
The clear water contrast	483.75	24.25	5.01

The effect (Jinhu County, Jiangsu) of 1.1% Avermectin nimbin suspending agent control rice leaf folder

Handle	The investigation number of sheets	The leaf roll number	Leaf roll rate (%)	Preventive effect (%)	LSR
							5％	1％
					75 milliliters/mu	723.75			63.75	8.8	85.9	D	D
100 milliliters/mu	727.50	36.75	5.1	87.8			B	B
					150 milliliters/mu	720.00			26.00	3.6	91.4	A	A
0.3% nimbin emulsion (45 milliliters/mu)	723.75	47.25	6.5	84.4			C	C
					1.8% abamectin emulsifiable concentrate (20 milliliters/	731.25			101.25	13.8	66.9	E	E

Mu)
							The clear water contrast	727.50	303.5	41.7

Claims (8)

1, a kind of biological insecticides with synergistic function, it is characterized in that described insecticide is to add auxiliary agent and filler is made suspending agent in active ingredient Avermectin and nimbin, the preparation raw materials by weight is Avermectin 0.1-1.5%, nimbin 0.05-0.5%, auxiliary agent 2-25%, filler 73.5-97.8%.

2, a kind of biological insecticides with synergistic function according to claim 1, the auxiliary agent that it is characterized in that described suspending agent are by wetting dispersing agent 1-15%, antifreeze 1-3%, and thickener 0.05-2%, defoamer 2-5% forms.

3, a kind of biological insecticides with synergistic function according to claim 1 and 2 is characterized in that described wetting dispersing agent can adopt one or more the mixture in polyoxyethylene triphenylethylene phosphenylic acid salt, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene, the polyoxyethylene nonylphenol ether (NP-9).

4, a kind of biological insecticides with synergistic function according to claim 1 and 2 is characterized in that described antifreeze adopts alcohols.

5, a kind of biological insecticides with synergistic function according to claim 1 and 2 is characterized in that described thickener adopts water-soluble high-molecular substance xanthans or aluminium-magnesium silicate.

6, a kind of biological insecticides with synergistic function according to claim 1 and 2 is characterized in that defoamer adopts silicone based defoamer.

7, a kind of biological insecticides with synergistic function according to claim 1 is characterized in that described filler is that white carbon black mixes with water.

8, a kind of process for preparing bio-insecticide with synergistic function is characterized in that may further comprise the steps:

(1) fully mixes by said ratio weighing Avermectin, nimbin, wetting dispersing agent, antifreeze and part water, be transferred in the sand mill and grind;

(2) with thickener and the water ratio mixed dissolution with 1: 50, silicone defoaming agent and filler water fully mix, and join in the material that is grinding according to the aforementioned proportion amount of getting.

(3) in the process of grinding, just add proper quantity of defoaming agent as foam, till adding the aforementioned proportion consumption.

(4) after sand mill fully grinds, discharging promptly gets this product.