Aerosol sprayer for insect pest mating disruption

Patent metadata

Field	Value
Publication number	US-12225901-B2
Application number	US-202117243113-A
Country	US
Kind code	B2
Filing date	Apr 28, 2021
Priority date	Apr 28, 2020
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A composition for forming an aerosol, an aerosol sprayer for insect pest mating disruption, and a method for insect pest mating disruption, thereby reducing disadvantageous effects caused by falling to a ground surface and oxidative decomposition of the sprayed particles. More specifically, the composition including an aerosol stock solution containing an aliphatic linear aldehyde having 10 to 20 carbon atoms and a non-alcoholic diluent, and a propellant, wherein a weight ratio of the aerosol stock solution to the propellant is from 45:55 to 65:35; the sprayer including the composition and a pressure resistant container for enclosing the composition therein, wherein sprayed particles at a spray travel distance of 15 cm have a median particle size (Dv50) at 25° C. of from 35 to 65 μm by a volume-based cumulative particle size distribution and; the method using the aerosol sprayer; and the like.

First claim

The invention claimed is:

1. An aerosol sprayer for insect pest mating disruption, the sprayer comprising:
a composition for forming an aerosol, the composition comprising:
an aerosol stock solution containing an aliphatic linear aldehyde having 10 to 20 carbon atoms and a non-alcoholic diluent; and
dimethyl ether as a propellant;
wherein a weight ratio of the aerosol stock solution to the propellant is from 45:55 to 65:35; and
a pressure-resistant container for enclosing the composition therein;

wherein sprayed particles at a spray travel distance of 15 cm have a median particle size (Dv50) at 25° C. of from 38 to 65 μm in a volume-based cumulative particle size distribution.

2. The aerosol sprayer for insect pest mating disruption according to claim 1 , wherein the non-alcoholic diluent is selected from hydrocarbons.

3. The aerosol sprayer for insect pest mating disruption according to claim 2 , wherein the non-alcoholic diluent is heptane.

4. The aerosol sprayer for insect pest mating disruption according to claim 1 , wherein the aliphatic linear aldehyde is Z11Z13-hexadecadienal.

5. The aerosol sprayer for insect pest mating disruption according to claim 1 , wherein the sprayed particles at a spray travel distance of 15 cm have a 90% particle size (Dv90) at 25° C. of from 65 to 150 μm in the volume-based cumulative particles size distribution.

6. The aerosol sprayer for insect pest mating disruption according to claim 1 , wherein the sprayed particles at a spray travel distance of 15 cm have a 10% particle size (Dv10) at 25° C. of from 5 to 35 μm in the volume-based cumulative particle size distribution.

7. The aerosol sprayer for insect pest mating disruption according to claim 1 , wherein the weight ratio is from 50:50 to 60:40.

8. The aerosol sprayer for insect pest mating disruption according to claim 1 , wherein the non-alcoholic diluent is heptane and the aliphatic linear aldehyde is Z11Z13-hexadecadienal.

9. A method for insect pest mating disruption, the method comprising steps of:
installing the aerosol sprayer of claim 1 at a concentration of 0.5 to 4 sprayers/acre in a field; and
spraying the composition in the aerosol sprayer into a field.

10. The method for insect pest mating disruption according to claim 9 , wherein a sprayed volume of the composition per spray event is 20 to 100 μL, and each spray event is carried out at an interval of from 5 to 20 minutes.

11. The method for insect pest mating disruption according to claim 10 , wherein the aliphatic linear aldehyde contained in the sprayed volume per spray event is in an amount of 0.3 to 5 mg.

12. A method for insect pest mating disruption, the method comprising a step of spraying a composition for forming an aerosol into a field in such a manner that sprayed particles at a spray travel distance of 15 cm have a median particle size (Dv50) at 25° C. of from 35-38 to 65 μm in a volume-based cumulative particle size distribution,
wherein the composition comprises:
an aerosol stock solution containing an aliphatic linear aldehyde having 10 to 20 carbon atoms and a non-alcoholic diluent; and
dimethyl ether as a propellant;
wherein a weight ratio of the aerosol stock solution to the propellant is from 45:55 to 65:35.

13. The method for insect pest mating disruption according to claim 12 , wherein the sprayed particles at a spray travel distance of 15 cm have a 90% particle size (Dv90) at 25° C. of from 65 to 150 μm in the volume-based cumulative particle size distribution.

14. The method for insect pest mating disruption according to claim 12 , wherein the sprayed particles at a spray travel distance of 15 cm have a 10% particle size (Dv10) at 25° C. of from 5 to 35 μm in the volume-based cumulative particles size distribution.

15. The method for insect pest mating disruption according to claim 12 , wherein a sprayed volume of the composition per spray event is from 20 to 100 μL and each spray event is carried out at an interval of from 5 to 20 minutes.

16. The method for insect pest mating disruption according to claim 15 , wherein the aliphatic linear aldehyde contained in the sprayed volume per spray event is in an amount of 0.3 to 5 mg.

Assignees

• Shinetsu Chemical Co

Inventors

• Ishibashi Naoki
• Miyake Yuki
• Kinsho Takeshi

Classifications

• A01N35/02 Primary

  containing aliphatically bound aldehyde or keto groups, or thio analogues thereof; Derivatives thereof, e.g. acetals · CPC title

• A01N49/00

  Biocides, pest repellants or attractants, or plant growth regulators, containing compounds containing the group [IMAGE cpc-sch-A01N-0948.gif], wherein m+n>=1, both X together may also mean —Y— or a direct carbon-to-carbon bond, and the carbon atoms marked with an asterisk are not part of any ring system other than that which may be formed by the atoms X, the carbon atoms in square brackets being part of any acyclic or cyclic structure, or the group [IMAGE cpc-sch-A01N-0949.gif], wherein A means a carbon atom or Y, n>=0, and not more than one of these carbon atoms being a member of the same ring system, e.g. juvenile insect hormones or mimics thereof (containing hydrocarbons A01N27/00) · CPC title

• A01M7/0014

  Field atomisers, e.g. orchard atomisers, self-propelled, drawn or tractor-mounted · CPC title

• A01N25/06 Primary

  Aerosols · CPC title