Biodegradable bait station for liquid ant bait

Patent metadata

Field	Value
Publication number	US-10729121-B2
Application number	US-201515329181-A
Country	US
Kind code	B2
Filing date	Jul 27, 2015
Priority date	Jul 25, 2014
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A biodegradable bait station is disclosed that can be used with liquid baits targeting pest ants in urban, agricultural, and natural setting, which can overcome several limitations that most of other liquid bait stations currently experience. For example, instead of keeping a large quantity of liquid bait in a reservoir, a small amount, for example, 10-20 ml of sugary liquid bait with an insecticide, for example, boric acid, thiamethoxam, imidacloprid, will be contained in a biodegradable cylindrical container with one open end. The open end will be plugged with a piece of water absorbent polymer or gel, for example, polyacrylamide gel, sodium alginate. The water absorbent polymer or gel absorbs the liquid bait and expands inside of the cylindrical container so that it will function as a polymer “wick” to deliver a small amount of the liquid bait to foraging ants.

First claim

What is claimed is:

1. A biodegradable bait station for liquid ant bait, the bait station comprising:
a biodegradable bait reservoir having a closed end and an open end;
a reservoir of liquid bait housed inside the biodegradable bait reservoir; and
a polymer or gel matrix plug configured to wick an amount of the liquid bait housed in the biodegradable bait reservoir, the polymer or gel matrix plug arranged on the open end of the biodegradable bait reservoir and configured to retain the liquid bait inside the biodegradable bait reservoir and as the reservoir of liquid bait housed in the biodegradable bait reservoir decreases, the polymer or gel matrix plug moves into the biodegradable bait station as a result of a reduction of the liquid bait and a seal between the polymer or gel matrix plug and an inner wall of the biodegradable bait reservoir.

2. The bait station of claim 1 , wherein the biodegradable bait reservoir comprises a cylindrical housing, and wherein the polymer or gel matrix plug is in the open end of the cylindrical housing.

3. The bait station of claim 2 , wherein the polymer or gel matrix plug is a water absorbent polymer or gel configured to absorb the liquid bait and expands inside of the cylindrical container, such that the polymer or gel matrix plug functions as a polymer wick.

4. The bait station of claim 3 , wherein the polymer wick is configured to deliver the liquid bait to foraging ants.

5. The bait station of claim 3 , wherein the water absorbent polymer or gel is a polyacrylamide gel and/or sodium alginate.

6. The bait station of claim 2 , comprising:
attractant pheromone(s) of target ants, which is incorporated into the liquid bait.

7. The bait station of claim 1 , comprising:
a sugary liquid bait with an insecticide, which is contained in the bait reservoir.

8. The bait station of claim 7 , wherein the insecticide is boric acid, thiamethoxam, and/or imidacloprid.

9. The bait station of claim 1 , wherein a porosity of the polymer or gel matrix plug is configured to allow the liquid bait to efficiently diffuse through the polymer or gel matrix.

10. The bait station of claim 1 , wherein the biodegradable bait reservoir is comprised of a bioplastic that is derived from renewable biomass sources.

11. The bait station of claim 10 , wherein the bioplastic is vegetable fats and oils, corn starch, pea starch, or microbiota.

12. The bait station of claim 10 , wherein the bioplastic is a starch-based plastics, cellulose-based plastics, polylactic acid (PLA), poly-3-hydroxybutyrate (PHB), polyhydroxyalkanoates (PHA), and bio-derived polyethylene.

13. The bait station of claim 1 , comprising:
an insecticide that results in a slow mortality upon ingestion.

14. The bait station of claim 13 , wherein the slow mortality is 3-4 days until mortality as opposed to less than about 1 day until mortality.

15. The bait station of claim 1 , comprising:
a groove or guideline on an inner surface of the bait station, the groove or guideline configured to assist with the movement of the polymer or gel matrix plug into the biodegradable bait reservoir on the inner wall of the biodegradable bait reservoir.

16. The bait station of claim 1 , comprising:
attractant pheromone(s) of target ants, which is incorporated into the bait station.

17. A method of delivering liquid bait, the method comprising:
housing a reservoir of liquid bait in a biodegradable bait reservoir; and
delivering an amount of the liquid bait via a polymer or gel matrix plug, which wicks the liquid bait from the reservoir of liquid bait housed in the biodegradable bait reservoir, and wherein the polymer or gel matrix plug is arranged on an open end of the biodegradable bait reservoir and configured to retain the liquid bait inside the biodegradable bait reservoir and as the reservoir of liquid bait housed in the biodegradable bait reservoir decreases, the polymer or gel matrix plug moves into the biodegradable bait station as a result of a reduction of the liquid bait and a seal between the polymer or gel matrix plug and an inner wall of the biodegradable bait reservoir.

18. The method of claim 17 , comprising:
housing the reservoir of liquid bait in a biodegradable cylindrical housing.

19. The method of claim 18 , wherein the or gel matrix plug is a water absorbent polymer or gel configured to absorb the liquid bait and expand inside of the cylindrical container, such that the polymer or gel matrix plug functions as a polymer wick.

20. The method of claim 17 , comprising:
a sugary liquid bait with an insecticide, which is contained in the bait reservoir, and the insecticide is boric acid, thiamethoxam, and/or imidacloprid.

21. The method of claim 19 , wherein the water absorbent polymer or gel is a polyacrylamide gel and/or sodium alginate.

Assignees

• Choe Dong Hwan
• Rust Michael K
• Hoddle Mark
• Mulchandani Ashok
• Univ California

Inventors

• Choe Dong-Hwan
• Rust Michael K
• Hoddle Mark
• Mulchandani Ashok

Classifications

• A01N25/04

  Dispersions, {emulsions, suspoemulsions, suspension concentrates} or gels (foams A01N25/16) · CPC title

• A01M1/023

  Attracting insects by the simulation of a living being, i.e. emission of carbon dioxide, heat, sound waves or vibrations · CPC title

• A01N51/00

  Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring · CPC title

• A01N59/14

  Boron; Compounds thereof · CPC title

• A01M1/2011 Primary

  for crawling insects · CPC title