阅读说明：本技术 含三氟甲吡醚和溴虫腈的复合杀虫组合物及其用途 (Composite insecticidal composition containing pyridalyl and chlorfenapyr and application thereof ) 是由 黄朋勉 古锟山 于 2018-08-13 设计创作，主要内容包括：本发明公开了一种含三氟甲吡醚和溴虫腈的复合杀虫组合物及其用途,该杀虫组合物以三氟甲吡醚和溴虫腈为杀虫活性成分,其中三氟甲吡醚和溴虫腈的重量比为1-100:1-100。该杀虫组合物能产生较高的协同增效作用,克服和延缓了害虫抗药性,杀虫速度快,持效期长,降低了用药成本,防治效果明显高于单剂使用。本发明可用于防治农作物上鳞翅目害虫,尤其可用于防治抗性棉铃虫、螟虫。(The invention discloses a composite insecticidal composition containing pyridalyl and chlorfenapyr and application thereof, wherein the insecticidal composition takes pyridalyl and chlorfenapyr as insecticidal active ingredients, and the weight ratio of the pyridalyl to the chlorfenapyr is 1-100: 1-100. The insecticidal composition can generate higher synergistic effect, overcomes and delays the drug resistance of pests, has high insecticidal speed and long duration, reduces the drug cost, and has obviously higher control effect than single dosage. The invention can be used for preventing and controlling lepidoptera pests on crops, and particularly can be used for preventing and controlling resistant cotton bollworms and stem borers.)

1. The insecticidal composition is characterized in that the insecticidal composition takes the pyridalyl and the chlorfenapyr as insecticidal active ingredients, wherein the weight ratio of the pyridalyl to the chlorfenapyr is 1-100: 1-100.

2. The insecticidal composition containing pyridalyl and chlorfenapyr according to claim 1, wherein the weight ratio of pyridalyl to chlorfenapyr is preferably 0.5-10:1-30, more preferably 1-10:1-10, and most preferably 1-10: 1.

3. The insecticidal composition containing pyridalyl and chlorfenapyr according to claim 1, wherein the weight percentage of the pyridalyl and the chlorfenapyr in the insecticidal composition is 3% -80%.

4. The insecticidal composition containing pyridalyl and chlorfenapyr according to claim 3, wherein the weight percentage of the pyridalyl and the chlorfenapyr in the insecticidal composition is preferably 5% to 55%, more preferably 15% to 55%, and most preferably 15% to 25%.

5. The insecticidal composition containing the pyridalyl and the chlorfenapyr according to claim 1, which is characterized in that the insecticidal composition takes the pyridalyl and the chlorfenapyr as insecticidal active ingredients and pesticide auxiliary agents and can be prepared into pesticide allowable dosage forms.

6. The insecticidal composition containing pyridalyl and chlorfenapyr according to claim 5, wherein the formulation is preferably an emulsifiable concentrate, a suspension, an aqueous emulsion, a wettable powder, a microemulsion or a water dispersible granule.

7. The insecticidal composition containing pyridalyl and chlorfenapyr according to claim 1 is mainly applied to control of pesticide-resistant lepidoptera pests.

8. Use according to claim 7, characterized in that the resistant lepidopteran pest is a cotton bollworm or a borer.

Technical Field

The invention belongs to the field of pesticides, and particularly relates to an insecticidal composition taking pyridalyl and chlorfenapyr as main active ingredients and application thereof.

Background

Pyridalyl (Pyridalyl), chemical name: 2- {3- [ 2.3-dichloro-4- (3, 3-dichloro-2-propenyloxy) phenoxy ] propoxy } -5- (trifluoromethyl) pyrimidine, structure formula.

The pyridalyl is also called pyridalyl, is a novel pyrimidine high-efficiency and low-toxicity insecticide developed and developed by Sumitomo chemical company in Japan, has excellent control effect on lepidoptera pests, and has no cross resistance with the existing lepidoptera insecticide. It has excellent contact poisoning and stomach poisoning preventing effect.

The existing data are queried for pyridalyl and many other pesticides such as: the pesticide formulations such as missible oil and the like prepared from destruxins of Metarrhizium anisopliae, monosultap, dimehypo and the like have good synergistic effect on killing lepidoptera pests.

Chlorfenapyr (Chlorfenapyr), chemical name: 4-bromo-2- (4-chlorophenyl) -1- (ethoxymethyl) -5- (trifluoromethyl) pyrrole-3-carbonitrile. The structural formula is shown as follows.

Chlorfenapyr, also called chlorfenapyr, is an insecticide precursor, and has no toxic effect on insects. After feeding or contacting with chlorfenapyr in the insect body, the chlorfenapyr is converted into a specific insecticidal active compound under the action of a multifunctional oxidase, and the target of the compound is mitochondria in the cells of the insect body. The cell synthesis stops the life function due to the lack of energy, and the pests become weak in activity, appear speckles, change in color, stop in activity, coma, paralysis and softness after insecticide injection, and finally die. Can effectively prevent and control various pests on crops such as grains, cotton, fruits, vegetables and the like.

The chlorfenapyr has excellent control effect on boring, sucking and chewing pests and mites, is more effective than cypermethrin and cyfluthrin, and has stronger acaricidal activity than dicofol and cyhexatin. The medicament has the following characteristics: broad-spectrum insecticidal and acaricidal agents; has stomach toxicity and contact poisoning effects; no cross resistance with other insecticides; moderate residual activity on crops; absorbing the active ingredients in nutrient solution through root system; the oral toxicity to mammals is moderate, and the transdermal toxicity is low; the effective application amount is low.

The chlorfenapyr has a wide insecticidal spectrum, and field experiments and practical applications show that the chlorfenapyr has an excellent control effect on more than 70 pests in Lepidoptera, Homoptera, Coleoptera and the like, and particularly has special effects on diamond back moths, beet armyworms, prodenia litura, liriomyza sativae, stigmatis suppressalis, thrips, red spiders and the like in vegetable resistant pests. The chlorfenapyr belongs to a bionic pesticide, has low toxicity and high insecticidal speed, can kill pests after being applied for 1 hour, and has the control effect of more than 85 percent on the same day. The resistance is broken, the action mechanism is unique, the resistance is different from that of other insecticides, the cross resistance is avoided, and the resistance is high-efficiency to pests with serious drug resistance. Especially has good effect on pests and mites which have resistance to organophosphorus, carbamate, pyrethrin and chitin synthesis inhibitor insecticides. The effective period is especially long, the effective period can be controlled for 15-20 days on the prevention and control of resistant pests, and the residual effective period for preventing and controlling red spiders is as long as 35 days. The chlorfenapyr is a naturally screened pyrrole substance and is very safe to human bodies and livestock. Is particularly suitable for being used in export products and high-quality products.

Currently, chemical control exists in which repeated single use of a certain pesticide or composition results in resistance to the pest, and there is a need to provide pesticidal compositions that overcome the resistance. Chemical control requires a composition that can reduce the rate of use, reduce the environmental impact, and provide effective control while achieving quick and long lasting effects on pests. Accordingly, the present invention aims to provide an insecticidal composition which solves at least one of the above problems: such as delaying resistance, improving activity, reducing usage rate, etc.

Disclosure of Invention

The invention aims to provide an insecticidal composition containing pyridalyl and chlorfenapyr, which is an insecticidal composition for preventing and controlling resistant lepidoptera pests.

The invention also aims to provide a pesticide composition which has reasonable components, obvious synergistic effect, excellent insecticidal effect, long duration and low drug cost, can delay the generation of drug resistance of pests and is safe to crops.

The purpose of the invention is realized by the following technical scheme.

The composite insecticidal composition takes the pyridalyl and the chlorfenapyr as main effective components, wherein the weight ratio of the pyridalyl to the chlorfenapyr is 1-100: 1-100.

In the insecticidal composition, the weight ratio of the pyridalyl (A) to the chlorfenapyr (B) is preferably 0.5-10:1-30, preferably 1-10:1-10, and most preferably 1-10: 1.

The composite composition can only contain the active ingredients of pyridalyl and chlorfenapyr, other ingredients can also be added into the active ingredients during use or preparation, and the active ingredients in the insecticidal composition can also be present in the composition in a synergistic effective amount.

In the insecticidal composition, the weight percentage of the pyridalyl and the chlorfenapyr in the insecticidal composition is 3-80%. Preferably 5% to 55%, more preferably 15% to 55%, most preferably 15% to 25%.

The insecticidal composition is prepared into any formulation allowed in pesticides by taking the pyridalyl and the chlorfenapyr as active ingredients or main effective ingredients and pesticide auxiliaries, and the formulation is preferably missible oil, a suspending agent, wettable powder, an aqueous emulsion, a microemulsion or water dispersible granules.

The aforementioned pesticide adjuvant applicable to the present invention is not particularly limited, and includes, but is not limited to, dodecylbenzene

Calcium sulfonate, Nongru No. 600, polyoxyethylene polyoxypropylene block compound (such as Nongru No. 33), nonylphenol polyoxyethylene ether, and the like, and the aforementioned excipients that can be used in the present invention are also not particularly limited, and include, but are not limited to, mineral spirits, water, antifreeze such as propylene glycol

Alcohol, deionized water, and the like. The above adjuvants, excipients and other adjuvants can be used singly or in combination.

The composite insecticidal composition has good control effect on various hemiptera and lepidoptera pests which are easy to generate resistance, such as cotton bollworms, borers and the like.

The insecticidal composition can be used for preparing and controlling resistant lepidoptera pests, and particularly has an obvious application effect in preparing and controlling cotton bollworms or stem borers. The stem borer is preferably rice stem borer.

Compared with the prior art, the composition has the advantages that the composition has obvious synergistic effect on resistant lepidoptera pests such as cotton bollworms, borers and the like, overcomes and delays the drug resistance of the pests, expands the control spectrum, has high insecticidal speed, obviously improves the control effect, reduces the control labor and drug cost, has quick-acting and long-acting effects, and has obviously higher effect than that of a single dose compared with the single dose of pyridalyl.

Detailed Description

The invention is further illustrated but is not in any way limited by the following examples.

Virulence assay example 1: indoor toxicity determination test of pyridalyl and chlorfenapyr on resistant cotton bollworm

Indoor toxicity determination is carried out by adopting a leaf soaking method, resistant cotton bollworms are selected as target pests, each treatment is repeated for 3 times, each concentration treatment is carried out for 60 times, and the lethal middle concentration LC of each medicament on the resistant cotton bollworms is calculated by using a probability value method₅₀By LC₅₀The cotoxicity coefficient is calculated according to the Sun Yunpei method. The co-toxicity coefficient CTC of the compound preparation is more than or equal to 120 and is shown as synergistic action, the coefficient CTC of more than 80 and less than 120 is shown as additive action, and the coefficient CTC of less than or equal to 80 is shown as antagonistic action. The results of the indoor virulence determination are detailed in table 1:

table 1: triflupe and chlorfenapyr compound and toxicity determination result of single dose to resistant cotton bollworm

Medicament	LC50（mg/L）	Virulence index TTI	Co-toxicity coefficient (CTC)
				Pyridalyl (A)	3.51
Chlorfenapyr (B)	13.92
				A:B=100:1	2.87	99.26	123.21
A:B=50:1	2.59	98.53	137.54
				A:B=20:1	2.01	96.44	181.08
A:B=10:1	2.95	93.20	127.66
				A:B=1:1	2.86	62.61	196.03
A:B=1:5	3.59	37.68	259.48
				A:B=1:10	4.59	32.01	238.87
A:B=1:50	7.97	26.68	165.06
				A:B=1:100	8.84	25.96	152.97

As can be seen from Table 1, the LC50 of pyridalyl and chlorfenapyr against resistant Helicoverpa armigera were 3.51mg/L and 13.92mg/L, respectively. When the mass ratio of the pyridalyl to the chlorfenapyr is 100:1 to 1:100, the cotoxicity coefficient CTC is more than 120, good synergistic effect is shown, especially when the mass ratio of the pyridalyl to the chlorfenapyr is 1:1, 1:5 and 1:10, the cotoxicity coefficient CTC is 196.03, 259.48 and 238.87, and the synergistic effect is most obvious when the mass ratio is 1: 5.

Virulence assay example 2: the indoor toxicity test of the pyraflufen-sodium and the chlorfenapyr on the rice-stem borer adopts a leaf soaking method to carry out indoor toxicity test, the rice-stem borer is selected as a target pest, each treatment is repeated for 3 times, each treatment concentration is 60, and the lethal middle concentration LC of each medicament on the rice-stem borer is calculated by a probability value method₅₀By LC₅₀The co-toxicity coefficient is calculated according to the Sun Yunpei method, the co-toxicity coefficient CTC of the compound preparation is more than or equal to 120 and shows synergistic action, the co-toxicity coefficient CTC of the compound preparation is more than 80 and less than 120 and shows additive action, and the co-toxicity coefficient CTC of the compound preparation is less than or equal to 80 and shows antagonistic action. The results of the indoor virulence determination are detailed in table 2:

table 2: triflupyraflufen and chlorfenapyr compound and single agent toxicity determination result on rice stem borer

Medicament	LC50（mg/L）	Virulence index TTI	Co-toxicity coefficient (CTC)
				Pyridalyl (A)	1.14
Chlorfenapyr (B)	5.67
				A:B=100:1	0.90	99.21	127.68
A:B=50:1	0.89	98.43	130.13
				A:B=20:1	0.87	96.20	136.22
A:B=10:1	0.71	92.74	173.14
				A:B=1:1	0.75	60.05	253.11
A:B=1:5	1.55	33.42	220.06
				A:B=1:10	2.12	27.37	196.48
A:B=1:50	3.17	21.67	165.94
				A:B=1:100	3.45	20.90	158.13

As shown in Table 2, the LC50 of the pyridalyl and the chlorfenapyr to the rice-stem borer is 1.14mg/L and 5.67mg/L respectively. When the mass ratio of the pyridalyl to the chlorfenapyr is 100:1 to 1:100, the cotoxicity coefficients of the pyridalyl and the chlorfenapyr are both greater than 120, and the good synergistic effect is shown, particularly when the mass ratio of the pyridalyl to the chlorfenapyr is 1:1, 1:5 and 1:10, the cotoxicity coefficients of the pyridalyl and the chlorfenapyr are 253.11, 220.06 and 196.48, wherein the synergistic effect is most obvious when the mass ratio is 1: 1.