Insecticidal and miticidal mixtures of bifenthrin and cyano-pyrethroids
View Patent ↗The present invention is directed to novel insecticidal and/or miticidal compositions comprising bifenthrin and a cyano-pyrethroid. The compositions exhibit an unexpected increase in insecticidal activity as compared to the insecticidal activity of the individual components.
1. A miticidal composition comprising bifenthrin and a cyano-pyrethroid selected from the group consisting of deltamethrin, cyfluthrin, alpha-cypermethrin, zeta-cypermethrin, lambda-cyhalothrin, and esfenvalerate, wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 10:1 to 1:30.
2. The composition of claim 1 wherein the cyano-pyrethroid is zeta-cypermethrin.
3. The composition of claim 2 wherein the zeta-cypermethrin is (R,S)-α-cyano-3-phenoxybenzyl-(1RS)-cis-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate which has been enriched in the 1R-cis-S and 1R-trans-S isomers by the reaction of a 55/45 cis/trans mixture of cypermethrin with a catalytic amount of tricaprylylammonium chloride and sodium carbonate in n-heptane.
4. The composition of claim 1 further comprising an agriculturally acceptable extender or adjuvant.
5. A method for controlling unwanted insects or mites comprising applying a composition comprising bifenthrin and a cyano-pyrethroid selected from the group consisting of deltamethrin, cyfluthrin, alpha-cypermethrin, zeta-cypermethrin, lambda-cyhalothrin, and esfenvalerate, wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 10:1 to 1:30 to the foliar portion of a plant.
6. The composition of claim 1 wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 4:1 and 1:4.
7. The composition of claim 6 wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 3:1 and 1:3.
8. The composition of claim 6 wherein the cyano-pyrethroid is zeta-cypermethrin.
9. The method of claim 5 wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 4:1 and 1:4.
10. The method of claim 9 wherein the cyano-pyrethroid is zeta-cypermethrin.
11. A foliar insecticidal or miticidal composition comprising bifenthrin and a cyano-pyrethroid selected from the group consisting of deltamethrin, cyfluthrin, alpha-cypermethrin, zeta-cypermethrin, lambda-cyhalothrin, and esfenvalerate, wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 10:1 to 1:30.
12. The composition of claim 11 wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 4:1 and 1:4.
13. The composition of claim 12 wherein the weight ratio of bifenthrin to cyano-pyrethroid is from 3:1 and 1:3.
14. The composition of claim 11 wherein the cyano-pyrethroid is zeta-cypermethrin.
15. The composition of claim 12 wherein the zeta-cypermethrin is (R,S)-α-cyano-3-phenoxybenzyl-(1RS)-cis-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate which has been enriched in the 1R-cis-S and 1R-trans-S isomers by the reaction of a 55/45 cis/trans mixture of cypermethrin with a catalytic amount of tricaprylylammonium chloride and sodium carbonate in n-heptane.
16. The composition of claim 11 further comprising an agriculturally acceptable extender or adjuvant.