CN101317572A - Mixed plant source insecticide - Google Patents

Abstract

The invention discloses a preparation which is mixed by active composition of the plant source: rotenone and nicotine, belonging to the field of bio-pesticide. After being mixed, the rotenone and the nicotine have obvious synergistic action and overcome the shortages such as slow effect, short residual duration or narrow insecticidal spectrum or being greatly affected by the environment, and the like, of general bio-pesticide; the mixed preparation enlarges the control range of the preparation and the control spectrum; due to different mechanisms of two main agents, the pest is not easy to generate the resistance, thus delaying the pest resistance to insecticides; under the synergistic action of the mixed preparation, the actions of contact poison and stomach poisoning are obvious; the control effect is improved, the residual duration of the preparation is prolonged, the dosage of the preparation and the control cost are reduced; furthermore, the selected main preparation is the active composition of the plant source, thus having good environment compatibility, safety and no public harms.

Description

A kind of plant insecticide that is mixed

Technical field

The invention belongs to pesticide field, be specifically related to a kind of plant resource rotenone and nicotine be mixed and as the application of insecticide.

Background technology

Along with the enhancing of people's environmental consciousness, the inherent limitation that chemical pesticide exists becomes increasingly conspicuous, and develops environmentally friendly agricultural chemicals and receives much concern, and the development public nuisance-free agricultural chemicals has become the important trend of agricultural sustainable development; Because present biopesticide exists drug effect slow, the longevity of residure is shorter, or insecticidal spectrum is narrower, or affected by environment bigger wait not enough, so difficult what is generally accepted by market and is satisfied the needs that agricultural production develops.

Being mixed of plant resource active component with synergistic effect; it is an important topic of research and development in the industry; because can overcome the intrinsic limitation of chemical pesticide; also have the longevity of residure of prolongation, the pesticide resistance that delays insect, expanding prevention worm spectrum, improve control efficiency and reduce characteristics such as preventing and treating cost, this has important practical significance to the sustainable development of agricultural production and the protection of environmental ecology.

Summary of the invention

The purpose of this invention is to provide and a kind ofly can prevent and treat the various agricultural insect, and be difficult for developing immunity to drugs the insecticide of environmentally friendly type; Be that the active substance rotenone and the nicotine that will have different insecticidal mechanisms is mixed, mixture preparation has obvious synergistic effect with respect to the unisexuality active ingredient.

A kind of plant insecticide that is mixed, form by the percentage by weight of following active ingredients: rotenone 0.1～15%, nicotine 0.1～10%, surplus is auxiliary agent and deionized water;

In the above-mentioned plant insecticide that is mixed, as the rotenone of one of active insecticidal components, be fabaceous Derris, after therefrom the active insecticidal components of Ti Quing enters pest body, suppress that insect breathes and cell is grown, make it can not get the energy supply and benumb death; Rotenone does not have overt toxicity or phyto toxicity to vertebrate, and degraded does not have injury to natural enemy, the biologically active height rapidly in the environment.As two nicotine of active insecticidal components, be the Solanaceae herbaceous plant, after therefrom the active insecticidal components of Ti Quing enters pest body, effect rake point is an acetylcholinergic receptor, impel the inflow of calcium or sodium ion, disturb neural normal conduction and block, make insect excited earlier back paralysis and dead; Nicotine is low to mammal toxicity, and Environmental compatibility is good, has and tags and stomach poison function, and insecticidal spectrum is wide and consumption is few.

At above-mentioned a kind of botanical pesticide insecticide that is mixed, described active component rotenone and nicotine can be former medicines, can be technology extraction routinely from the plant that contains rotenone and nicotine, can be rotenone and nicotine preparation, and its weight proportion is the effective active composition.

In the above-mentioned plant insecticide that is mixed, auxiliary agent is synergist 2～15% weight, emulsifier 2～20% weight, and solvent 3～30% weight, cosolvent 0.1～5% weight, stabilizing agent 3～18% weight, antifreeze 0.1～5% weight, surplus is deionized water.Described synergist is wherein a kind of of asarone, Butacide, sesamin; Described emulsifier is wherein a kind of of Nongru-700, farming breast 0201, tween; Described solvent is wherein a kind of of acetone, ethanol, ethylene glycol; Described cosolvent is wherein a kind of of dimethyl formamide, cyclohexanone; Described stabilizing agent is wherein a kind of of castor oil, sudan black, bentonite; Described antifreeze is wherein a kind of of ethylene glycol, propane diols, glycerine.

The present invention is prepared common process by the formulations of pesticide make microemulsion insecticide.

The present invention has following beneficial effect: rotenone and nicotine have been widened the prevention and treatment range of preparation after being mixed, and have enlarged the control spectrum; Because the mechanism of action difference of two kinds of hosts, insect are difficult for producing resistance, have delayed pest resistance to insecticide; Under the mixture preparation synergistic function, it is obvious with stomach poison function to tag, and improves the longevity of residure of control efficiency and prolongation preparation, and dosing reduces reduction control cost; Selected host is the plant resource active component, and Environmental compatibility is good, safety nuisance free.

Specific implementation method:

Present embodiment host can be former medicine, can be to extract from the plant that contains rotenone and nicotine, can be rotenone and nicotine preparation, and its weight proportion is the effective active composition.

Host of the present invention is joined mutual ratio row and is not limited to down example.

Embodiment 1: prepare 1.8% rotenone. nicotine microemulsion (following component all is weight percentage)

Rotenone 0.5%

Nicotine 1.3%

Synergist 4.5%

Emulsifier 10%

Solvent 4%

Cosolvent 0.8%

Stabilizing agent 12%

Antifreeze 1.5%

Deionized water 65.4%

After above-mentioned active raw materials is mixed by weight percentage, prepare common process by the formulations of pesticide and make microemulsion insecticide.

Embodiment 2: prepare 3% rotenone. nicotine microemulsion (following component all is weight percentage)

Rotenone 1.2%

Nicotine 1.8%

Synergist 4.5%

Emulsifier 10%

Solvent 4%

Cosolvent 0.8%

Stabilizing agent 10%

Antifreeze 1.5%

Deionized water 66.2%

After above-mentioned active raw materials is mixed by weight percentage, prepare common process by the formulations of pesticide and make microemulsion insecticide.

Embodiment 3: prepare 4.5% rotenone. nicotine microemulsion (following component all is weight percentage)

Rotenone 2%

Nicotine 2.5%

Synergist 4%

Emulsifier 12%

Solvent 5%

Cosolvent 1%

Stabilizing agent 10%

Antifreeze 1.5%

Ionized water 62%

After above-mentioned active raw materials is mixed by weight percentage, prepare common process by the formulations of pesticide and make microemulsion insecticide.

To the high virulence of pickles, and estimate its cooperative synergism effect with co-toxicity coefficient with laboratory bioassay method test mixture preparation of the present invention and single agent agricultural chemicals, method of operating is as follows:

For trying insect: pickles are high.Pickles are high to be advanced age or pupa, by gathering in the field, raises to F2 with cabbage leaves in the insectary and to test for third-instar larvae.Rotenone and nicotine list preparation and mixed agent are made certain density dilution, cabbage leaves soaked for 10 seconds in preparation liquid, dried under field conditions (factors) 2 hours, in the culture dish of rearmounted what nine cm diameters, connect 15 of the high larvas of three pickles in age in every ware, the ware mouth covers with the wet filter paper that ventilative aperture is arranged and preserves moisture and the escape of anti-larva; Every processed group triplicate; Examination worm ware after the processing move to temperature control, the control light the insectary in the observation; Check the diamond-back moth death toll after 72 hours, ask corrected mortality, calculate the lethal concentration of 50 LC of each reagent agent ₅₀And co-toxicity coefficient.See Table 1, table 2.

Co-toxicity coefficient is a Synergistic greater than 100 significantly, near representing addition at 100 o'clock, less than representing antagonism at 100 o'clock.

Table 1 rotenone and the agent of nicotine list and mixture preparation are to diamond-back moth Toxicity Determination result

Medicament	Extension rate	Lethality %
			2.5% rotenone emulsifiable solution	1000	52.5
2% nicotine aqueous emulsion	1000	40.6
			1.8% rotenone. nicotine	1500	88.8
3% rotenone. nicotine	2500	93.2
			4.5% rotenone. nicotine	3500	92.7

Table 2 rotenone and the agent of nicotine list and mixture preparation are to the indoor virulence of diamond-back moth

Proportioning	LC 50(μg/ml)	95% confidence limit	Co-toxicity coefficient
				2.5% rotenone emulsifiable solution	81.89	66.72～92.89	0
2% nicotine aqueous emulsion	45.68	40.80～47.81	0
				1: 2.6 (rotenone: nicotine)	26.57	21.48～36.38	152.12
1: 1.5 (rotenone: nicotine)	22.93	15.67～22.66	179.33
				1: 1.25 (rotenone: nicotine)	23.87	16.02～24.15	178.48

See that from table 2 co-toxicity coefficient illustrates that all greater than 100 synergistic effect is obvious.When rotenone: when the proportioning of nicotine was 1: 1.5, the co-toxicity coefficient maximum reached 179.33

Mixture is to the field control effectiveness test of cabbage caterpillar:

Trial crops: Chinese cabbage; Experimental plot randomized arrangement, area are 25 square metres, and fortnight is not executed any agricultural chemicals before the test; Four repetitions are established in every processing.Will be for 1000 times of test preparation 2.5% rotenone emulsifiable solution dilutions, the dilution of 2% nicotine aqueous emulsion 1000 times, 1.8% rotenone. 1500 times of nicotine mixture preparation dilutions, 3% rotenone. 2500 times of nicotine mixture preparation dilutions, 4.5% rotenone. 3500 times of nicotine mixture preparation dilutions; Carry out conventional even spraying with knapsack hand sprayer; Duration of test does not rain, 25 ℃ of temperature average out to; Control plot spray equivalent clear water; Respectively with medicine before and picked up insect population number and the residual insect population number alive of looking into cabbage caterpillar in 1,3,7 day behind the medicine; Method is that 10 Chinese cabbages are randomly drawed in every sub-district; Calculate control efficiency data list 3

Table 3 rotenone and the agent of nicotine list and mixture preparation are to the cabbage caterpillar field control effectiveness test

Table 3 is the result show, 1.8% rotenone. nicotine, 3% rotenone. and nicotine and 4.5% rotenone. the nicotine mixture preparation is compared with 2.5% rotenone emulsifiable solution and 2% nicotine aqueous emulsion to the control efficiency of cabbage caterpillar, has the advantage of significantly preventing and treating.

Claims (5)

1. plant insecticide that is mixed is characterized in that being made up of the percentage by weight of following active ingredients: rotenone 0.1～15%, and nicotine 0.1～10%, surplus is auxiliary agent and deionized water.

2. a kind of plant insecticide that is mixed according to claim 1, it is characterized in that described active component rotenone and nicotine can be former medicines, it can be technology extraction routinely from the plant that contains rotenone and nicotine, can be rotenone and nicotine preparation, its weight proportion be the effective active composition.

3. a kind of plant insecticide that is mixed according to claim 1, it is characterized in that described auxiliary agent is synergist 2～15 weight %, emulsifier 2～20 weight %, solvent 3～30 weight %, cosolvent 0.1～5 weight %, stabilizing agent 3～18 weight %, antifreeze 0.1～5 weight %, surplus is a deionized water.

4. a kind of plant insecticide that is mixed according to claim 3 is characterized in that synergist is wherein a kind of of asarone, Butacide, sesamin; Described emulsifier is wherein a kind of of Nongru-700, farming breast 0201, tween; Described solvent is wherein a kind of of acetone, ethanol, ethylene glycol; Described cosolvent is wherein a kind of of dimethyl formamide, cyclohexanone; Described stabilizing agent is wherein a kind of of castor oil, sudan black, bentonite; Described antifreeze is wherein a kind of of ethylene glycol, propane diols, glycerine.

5. a kind of botanical pesticide insecticide that is mixed according to claim 1, the formulation of preparation is a microemulsion.