# US 4,395,969 A · Fish culture by sucker, stickleback, carp and bullhead catfish eradication

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,395,969 A
- Document ID: US4395969A
- Status: Granted
- Kind: A
- Application number: 06/303,341
- Filed: 1981-09-18
- Granted: 1983-08-02
- Earliest claimed: 1981-09-18
- Assignees: College of Forestry, Wildlife & Range Sciences, University of Idaho
- Inventors: Fred F. Cheng; Craig MacPhee
- Web page: https://patentgrep.com/patent/US4395969A

## CPC

- A01N 57/12: containing acyclic or cycloaliphatic radicals
- A01N 57/20: containing acyclic or cycloaliphatic radicals
- A01N 57/34: having phosphorus-to-halogen bonds; Phosphonium salts
- Y10S 424/09: Fish posts
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Control of stickleback, sucker, carp and bullhead catfish is accomplished by adding to their aqueous habitat a compound containing diethyl esters of phosphoric, phosphorous, thiophosphonic and thiophosphorous acid that contain a chloride or a chlorinated or vinyl group.

## Claims

### Claim 1

A method of improving fish culture by control of the stickleback, sucker, carp or bullhead catfish populations in an aqueous habitat comprising sticklebacks, suckers, carp or bullhead catfish and at least one member selected from a group of desirable fishes comprising chinook salmon, coho salmon, sockeye salmon, kokanee, steelhead, Kamloops trout, cutthroat trout, brook trout and Arctic grayling, said method comprising:
adding to the aqueous habitat a compound containing diethyl esters of phosphoric, phosphorous, thiophosphoric or thiophosphorous acid that further contains a chloride or a chlorinated ethyl or vinyl group, the compound being added at an effective concentration operatively lethal to the stickleback, sucker, carp or bullhead catfish populations, but not operatively lethal to said selected members of the group of desirable fishes.

### Claim 2 (depends on 1)

A method of fish culture as set out in claim 1, wherein the added compound is dichloroethyl or dichlorovinyl diethyl phosphate at a concentration in water ranging between 0.1 and 10 mg/l.

### Claim 3 (depends on 1)

A method of fish culture as set out in claim 1 wherein the added compound is tetrachloroethyl diethyl phosphate at a concentration in water ranging between 4 and 80 .mu.g/l.

### Claim 4 (depends on 1)

A method of fish culture as set out in claim 1 wherein the added compound is in the form of a mixture comprising 1 part tetrachloroethyl diethyl phosphate and 300 parts of dichloroethyl or dichlorovinyl diethyl phosphate.

### Claim 5 (depends on 4)

A method of fish culture as set out in claim 4 wherein the concentration of dichloroethyl or dichlorovinyl diethyl phosphate ranges between 1.35 and 3 mg/l and the concentration of tetrachloroethyl diethyl phosphate ranges between 4.5 and 9 .mu.g/l when applied in combination.

### Claim 6 (depends on 2)

A method of fish culture as set out in claim 2 further comprising the step of subsequently treating the aqueous habitat with activated carbon or potassium permanganate to decrease the toxic effects of the dichloroethyl or dichlorovinyl diethyl phosphate.