Abstract The sex pheromone dispenser form for controlling the population of insectan pests in the field is shaped of a polymeric material, e.g. polyethylene or ethylene-vinyl acetate copolymer, typically, in a tubular form and the tube wall serves as the barrier wall through which the sex pheromone compound permeates to be sustainedly released. A part or, for example, 30% to 90% of the outer surface area of the barrier wall is coated with a coating material impermeable or hardly permeable to the sex pheromone compound contained in the dispenser so that the rate of pheromone emission therefrom is adequately controlled to ensure full serviceable life of the dispenser over a desired length of time.
Inventors
👤 Kinya Ogawa
👤 Akira Yamamoto
👤 Shigehiro Nagura
Bibliographic Details
Application Number—
JurisdictionEP
Data Sourcegoogle_patents
Last Synchronized2026-10-29 07:33
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
An improvement, in a tubular dispenser form having an inner diameter in the range from 0.5 to 4 mm and a length in the range from 50 to 1000 mm for containing at least 40 mg of a sex pheromone compound of insects in which the pheromone compound permeates through a barrier wall made of a polyolefin or a copolymeric resin of vinyl acetate and an olefin and is sustainedly released from the outer surface of the barrier wall, which comprises coating a part of the outer surface of the barrier wall with a coating material which is impermeable or hardly permeable to the sex pheromone compound.
Claim 2
Dependent Claim
107 words
An improvement, in a tubular dispenser form having an inner diameter in the range from 0.5 to 4 mm and a length in the range from 50 to 1000 mm for containing at least 40 mg of a sex pheromone compound of insects in which the pheromone compound permeates through a barrier wall made of a polyolefin or a copolymeric resin of vinyl acetate and an olefin and is sustainedly released from the outer surface of the barrier wall, which comprises coating a part of the outer surface of the barrier wall with a coating material which is impermeable or hardly permeable to the sex pheromone compound.
Claim 3
Dependent Claim
34 words
The improvement as claimed in claim 1 wherein the coating material has an equilibrium swelling of 1% by weight or smaller at 20 °C with the sex pheromone compound contained in the dispenser form.
Claim 4
Dependent Claim
27 words
The improvement as claimed in claim 1 wherein from 30% to 90% of the outer surface area of the barrier wall is coated with the coating material.
Claim 5
Dependent Claim
39 words
The improvement as claimed in claim 1 wherein the coating material is selected from the group consisting of polyvinylidene chloride, polyvinylidene fluoride, polyacrylonitrile, polysulfone, polycarbonate, polyamide, polymer of acrylic acid ester, cellulose ester, regenerated cellulose, polyvinyl alcohol and polyurethane.
References Cited (Backward Citations)
No citation records indexed.
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