CN1212769C - Compound bionic insecticide - Google Patents

Abstract

The present invention relates to a bionic low-toxicity composite insecticide. The present invention is prepared from chlorfluazuron and monosultap (or bisultap) used as active components, auxiliary agents and filling material or solvent. According to the calculation of using pure dosage per mu, in the composite insecticide, the content of the chlorfluazuron is 0.1 to 5g, and the content of the monosultap (or bisultap) is 5 to 75g. The composite insecticide has the advantages: (1). the present invention has the advantages of obviously enhanced control effect on rice leaf rollers; (2). one composite insecticide can control various diseases, the present invention can also control rice borers and reduce the composite insecticide cost and labour cost of controlling rice destructive insects; (3). the present invention replaces high-toxicity agricultural chemicals, reduces the dosage of agricultural chemicals and reduces environment pollution and agricultural chemical residue in rice; (4). the present invention inhibits the destructive insect resistance to single agents; (5). compared with the single agents of the chlorfluazuron, the present invention reduces use costs.

Description

The agent of a kind of composite bionic insects

One, technical field

The invention belongs to the control of insect technical field, be specifically related to utilize the bio-imitability agricultural chemicals to press down hooligan (Chlorfluazuron) and desinsection list (Monosultap) or dimehypo (Dimehypo) is re-dubbed efficiently, low toxicity, multi-functional composite insecticide, be used for various pests such as high-efficiency prevention and control rice leaf folder, striped rice borer, paddy stem borer, pink rice borer and diamond-back moth, beet armyworm, and suppress the pesticide resistance of insect single insecticide.

Two, technical background

Rice leaf roller Cnaphalocrocis medinalis Guenee is a kind of migratory pest, and sudden strong, it is wide to cause harm, and the paddy rice of causing harm is caused Bai Ye, is one of paddy rice primary pest.Striped rice borer, paddy stem borer and pink rice borer then are the fulminant insects of a class this locality, and brill is eaten into the paddy rice of causing harm and caused the withered heart, withered sheath and dead ears, is the another kind of great insect of paddy rice.For a long time, the control of rice leaf roller mainly relies on insecticide varieties such as acephatemet, desinsection list.Wherein, the control efficiency of acephatemet is good, but owing to belong to the high toxicity agricultural chemicals, bans use of in the most of province of China in recent years; Desinsection list (or dimehypo, double sodium salt for desinsection list active component) belongs to the agent of nereistoxin and similar bionic insects, toxicity is lower, but the control efficiency of above rice leaf roller is lower to 2 ages, lasting period is short partially, and because long-term the use, rice leaf roller, striped rice borer and paddy stem borer have all produced tangible pesticide resistance, and use can not reach and control effect preferably separately.Owing to lack efficient, long-acting, low toxicant, under the situation that rice leaf roller in 2003 breaks out on a large scale, various places control pharmacopoeia confusion, dispenser frequent (was dispenser 1 time every 5～7 days), be the control insect pest, many areas even violate a ban use acephatemet, isocarbophos and the contour toxicant of parathion cause serious personnel's intoxication accident.Nonetheless, also fail to control seriously causing harm of rice leaf roller effectively, cause the white leaf of large tracts of land paddy rice, produce to paddy rice and bring heavy losses.Therefore, research and develop not only high-efficiency prevention and control rice leaf roller, but also the efficient double multi-functional low toxic pesticide of controlling other insects such as homochronous paddy stem borer, striped rice borer, become the task of top priority.

The bio-imitability agricultural chemicals is because imitation natural products structure, has efficient, low toxicity, is difficult for producing resistance and cost than advantages such as natural products reduce greatly, brings into play central role in the nuisanceless control of pest always.Desinsection list (dimehypo) is a kind of bio-imitability agricultural chemicals, uses nearly 30 years as the main medicament of the control snout moth's larva of rice in China.Pressing down hooligan is another kind of insect growth regulator, IGR class bio-imitability agricultural chemicals; chemical name is: 1-[3; 5-two chloro-4-(3-chloro-5-trifluoromethyl-2-pyridine oxygen base) phenyl]-3-(2; the 6-difluoro benzoyl) urea; the chitin that suppresses insect cuticle by specificity is synthetic, larva can not normally be casted off a skin grow and death.It is mainly effective to phytophagous Lepidoptera, diptera and coleopteran pest to press down hooligan, has characteristics such as dosage is low, stability and high efficiency.In China, owing to press down hooligan's import medicament price height, only be used for the higher vegetable crop of economic benefit always, be not used for the control of insect of field crops such as paddy rice as yet.But homemade hooligan comes into the market at present, and its price only is below 50% of imported product, and this lays a good foundation for pressing down the expansion application of hooligan in China's agricultural production.

In China's large tracts of land Rice Production, the rice leaf roller and the snout moth's larva of rice (pink rice borer of striped rice borer, paddy stem borer and coastal area etc.) are usually taken place the same period, cause serious compound causing harm.Though but hooligan's lasting period is long, desinsection speed is slow, can not control rapidly to cause harm, and lower to the insecticidal activity of borer pest striped rice borer, paddy stem borer.

Three, summary of the invention

1, goal of the invention

A kind of high-efficiency prevention and control rice leaf roller, striped rice borer, paddy stem borer etc. are provided, have the multi-functional composite bionic insects agent of quick-acting and long-acting characteristic concurrently.

2, technical scheme

To achieve the above object of the invention, the present invention utilizes two kinds of biomimetic insecticides of desinsection list (or dimehypo) that the lasting period is grown that but hooligan and quick-acting are strong composite by a certain percentage, obtained a kind of simultaneously to rice leaf folder, striped rice borer, beet armyworm on paddy stem borer and the vegetable crop, various pests such as diamond-back moth are efficient, significantly synergy, have quick-acting and the long multifunction imitated natural disposition composite insecticide of effect of holding concurrently, thereby the mu time consumption and the use cost that press down hooligan have significantly been reduced, and suppress insect to the desinsection list, the pesticide resistance that presses down the single agent of hooligan, can be in over a long time safety, stably control above-mentioned insect.

Composite bionic insects of the present invention agent is characterized in that by pressing down hooligan and two kinds of active ingredients of desinsection list (or dimehypo) and auxiliary agent, inertia filler or solvent composition.Use 100 gram finished medicines to calculate by every mu, the pure medicine content of various components is in the 100 gram finished medicines: press down hooligan's 0.1～5 gram, and desinsection list or dimehypo 5～75 grams, auxiliary agent 3～12 grams, all the other are filler.Finished medicines is a soluble powder, and auxiliary agent is nonionic or anionic surfactant or compound of the two and alkyl sulfonic acid dipersant, and filler is white carbon or potter's clay.

3, beneficial effect

Composite bionic insects of the present invention agent has compared with prior art produced following beneficial effect: (1) bionic pesticide, and toxicity is low, and is safe; (2) compare notable synergistic with single agent, significantly improved the effect of control rice leaf roller, striped rice borer, paddy stem borer etc.; (3) one medicines are controlled more, and a dispenser can prevent and treat various pests simultaneously, reduce the medicine basis and the cost of spraying times and control; (4) substitute the high toxicity agricultural chemicals, effectively reduced residue of pesticide in environmental pollution and rice, the aquatic products; (5) have quick-acting and long hold effect concurrently, behind a drug field lasting period more than 15 days, causing harm of a generation of Pest Control effectively, and the lasting period of prior art is short or quick-acting poor; (6) pesticide resistance of insects such as inhibition rice leaf roller, striped rice borer; (7) compare with pressing down the single agent of hooligan, this composite insecticide has not only strengthened the effect of control borer pest, and has significantly reduced dosage and application cost.

Four, embodiment:

Reagent agent: press down hooligan and produce for Yangzhou insecticide factory, the desinsection list is produced for the chemical plant, Liyang, and dimehypo is that Anhui Huaxing Chemical Co., Ltd. produces.

For the examination insect: the synergistic effect in composite dose between two kinds of single agent components is measured, used rice leaf roller and beet armyworm are 3 instar larvaes that gather in the field, diamond-back moth is 2 instar larvaes, and striped rice borer and paddy stem borer are that the pieces of an egg that gather in the field are hatched the back at indoor feeding to 3 instar larvae; The worm source of field trial is abiogenous rice leaf roller in experimental field and snout moth's larva etc. in the academy of agricultural sciences, Jiangsu Province, Nanjing.

Assay method:

The method that adopts indoor bioassay and field trial to combine.At first draw composite dose of co-toxicity coefficient of different proportionings,, determine prescription and consumption again by the clear and definite actual control efficiency of field trial to rice leaf roller, striped rice borer, paddy stem borer, diamond-back moth etc. by biologicall test.

Indoor synergy biologicall test: take by weighing a certain amount of former medicine of hooligan that presses down, behind acetone solution, add the emulsifier Triton-100 of cumulative volume 5%, mixing is mixed with 10% and presses down the single agent of hooligan.What water will be prepared again 10% presses down the soup that the single agent of hooligan and 92% desinsection list pulvis are diluted to a series of concentration respectively, and the compound soup of different proportionings (concrete ratio is seen each embodiment).Handle as blank with clear water, adopt the soup dip method to measure.Larva is soaked in soup after 1 second and takes out, and places earlier and blots soup on the blotting paper, places on the rice leaf again.After immersion liquid, investigate dead borer population respectively in 24 hours, 48 hours and 72 hours, calculate virulence and co-toxicity coefficient.

Field control effectiveness test: take by weighing a certain amount of former medicine of hooligan that presses down, quantitatively be dissolved in the small amount of acetone earlier, with quantitative 300 order white carbons absorption, make 40% and press down hooligan's pulvis then; Again it is mixed with 92% desinsection individual palpation different proportion, and the auxiliary agent (nonionic or anionic surfactant or its compound and alkyl sulfonic acid dipersant etc.) of adding gross weight 3～12%, mend to 100% with white carbon, abundant mixing promptly is mixed with the composite dose of soluble powder (concrete proportioning and content are seen embodiment) of different proportionings and content.Adopt the anti-therapy of spraying: contain the phase of sending out and striped rice borer or paddy stem borer ovum at the rice leaf roller low instar larvae and incubate the peak period dispenser, a certain amount of single agent or composite dose are converted water by every mu of dosage be configured to soup respectively for 50 kilograms, even spraying, every processing repeats 4 sub-districts, every sub-district 30m ²After dispenser, investigate the white number of sheets, withered calculation and residual borer population respectively in 2 days, 6 days and 15 days, calculate the control efficiency and the significance of difference.

Implementation result:

Embodiment 1

The result of synergy biologicall test shows: in pure dose, press down hooligan's 0.1 gram+desinsection list 50 grams, press down hooligan's 0.25 gram+desinsection list 40 grams, press down hooligan's 0.5 gram+desinsection list 30 grams, press down hooligan's 1.5 gram+desinsection lists 20 grams, press down hooligan's 2.5 gram+desinsection lists 10 grams, composite dose of totally 5 kinds of proportionings, the co-toxicity coefficient of rice leaf roller is respectively 185,188,253,191 and 177; Co-toxicity coefficient to striped rice borer is respectively 152,172,158,136 and 148; Co-toxicity coefficient to paddy stem borer is respectively 196,230,211,184 and 178.Show behind these two kinds of composite reagents above-mentioned three kinds of rice grubs are all had significant synergistic insecticidal action.

Embodiment 2:

Field trial shows: by the pure dose (down together) of every mu of use, press down composite dose that hooligan's 0.5 gram+desinsection list 30 restrains, after the dispenser 2 days, guarantor's leaf effect of control rice leaf roller is 76～83%, insecticidal effect is 80～87%, the utmost point (reaches 1% significance level significantly, be higher than mu with pressing down guarantor's leaf effect (26～33%) and the insecticidal effect (33～39%) that the single agent 1.5 of hooligan restrains down together), and (reach 5% significance level, down with) is higher than guarantor leaf (65～74%) and the insecticidal effect (71～78%) of mu with desinsection list 40 grams significantly.After the dispenser 6 days, guarantor's leaf effect of composite dose is 87～95%, insecticidal effect reaches 91～97%, suitable with guarantor's leaf (78～93%) that presses down hooligan's 1.5 grams and insecticidal effect (83～95%) with mu, the utmost point is significantly higher than guarantor leaf (58～74%) and the insecticidal effect (61～72%) of mu with the guarantor's leaf (56～65%) that presses down hooligan's 0.5 gram and insecticidal effect (55～62%) or desinsection list 40 grams.After the dispenser 15 days, guarantor's leaf effect of this composite dose control rice leaf roller is 85～93%, insecticidal effect is 94～100%, and still the utmost point is significantly higher than guarantor leaf (42～58%) and the insecticidal effect (24～35%) of mu with the guarantor's leaf (54～66%) that presses down hooligan's 0.5 gram and insecticidal effect (48～60%) or desinsection list 40 grams; The effect of control striped rice borer, the withered heart of paddy stem borer is respectively 90～96%, 88～93%, all is significantly higher than the effect (73～82%) of mu with desinsection list 40 grams, and the utmost point is higher than the mu preventive effect (34～54%) that presses down hooligan's 0.5～1.5 gram significantly.

Embodiment 3:

Field trial also shows: press down hooligan's 0.25 gram+desinsection list 40 grams composite dose, after the dispenser 2 days, guarantor's leaf effect of control rice leaf roller was 81～85%, and insecticidal effect 84～90%, the utmost point are significantly higher than mu with pressing down the effect (the same) that hooligan 1.5 restrains.After the dispenser 6 days, protecting the leaf effect was 84～93%, and insecticidal effect 90～95%, the utmost point are significantly higher than mu with the effect that presses down hooligan's 0.5 gram.After the dispenser 15 days, guarantor's leaf effect of this composite dose control rice leaf roller was 83～90%, and insecticidal effect is 92～98%, and the utmost point is significantly higher than mu with the effect that presses down hooligan's 0.5 gram or desinsection list 40 grams; The effect of control striped rice borer, the withered heart of paddy stem borer is respectively 90～94%, 86～94%, is significantly higher than the effect (73～82%) of mu with desinsection list 40 grams, and the utmost point is significantly higher than the preventive effect (34%～54%) that presses down hooligan's 0.5～1.5 gram.

Embodiment 4:

Press down hooligan's 1.5 gram+desinsection lists 20 grams composite dose, after the dispenser 2 days, guarantor's leaf effect of control rice leaf roller was 73～76%, and insecticidal effect 75～82%, the utmost point are significantly higher than mu with pressing down the effect that hooligan 1.5 restrains.After the dispenser 6 days, protecting the leaf effect was 90～96%, and insecticidal effect reaches 93～99%, and the utmost point is significantly higher than the corresponding effect of mu with desinsection list 40 grams.After the dispenser 15 days, guarantor's leaf effect of this composite dose control rice leaf roller was 92～95%, and insecticidal effect is 97～100%, and still the utmost point is significantly higher than the corresponding effect of mu with desinsection list 40 grams; The effect of control striped rice borer, the withered heart of paddy stem borer is respectively 85～90%, 83～93%, all be significantly higher than the effect of mu with desinsection list 40 grams, and the utmost point is significantly higher than the corresponding preventive effect (34%～54%) that presses down hooligan's 0.5～1.5 gram.

Above-mentioned result of implementation shows, composite dose with the single-phase ratio of desinsection, significant prolongation the lasting period; And compare with pressing down hooligan, then significantly strengthened the quick-acting of desinsection.Therefore, this composite dose all has quick-acting and long-acting characteristic concurrently to rice leaf roller, striped rice borer and paddy stem borer, becomes a kind of novel omnidistance efficient medicament, can reduce the field rotating medicine number of times.

Claims (2)

1, a kind of composite bionic insects agent, it is characterized in that by press down hooligan and two kinds of active ingredients of desinsection list and auxiliary agent, filler is formed, use 100 gram finished medicines to calculate by every mu, the pure content of each component is in the 100 gram finished medicines: press down hooligan 0.1-5 gram, desinsection list 5-75 gram, auxiliary agent 3-12 gram, all the other are filler.

2, composite bionic insects according to claim 1 agent is characterized in that finished medicines is a soluble powder, and its auxiliary agent is nonionic or anionic surfactant or the two compound and alkyl sulfonic acid dipersant, and filler is white carbon or potter's clay.