Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Biocides; animal or insect repellents or attractants
Patent
1994-02-04
1996-04-02
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Biocides; animal or insect repellents or attractants
424410, 424405, 424 84, A01N 2528
Patent
active
055038395
ABSTRACT:
An improved method is proposed for the preparation of a sex pheromone dispenser used in the elimination of pest insects from the field by the disruption of mating of the insects by distributing sustained-release dispensers containing the sex pheromone compound of the insect over the field. According to the invention, pheromone dispensers made from a polyolefin-based resin and filled with the liquid pheromone are subjected, prior to distribution over the field at a relatively low temperature in early spring, to a pretreatment of keeping them at 35.degree. to 60.degree. C. until the dispenser walls of the polyolefin resin absorb 2 to 10% by weight of the pheromone. When the dispensers after the pre-treatment are distributed, a relatively high rate of pheromone release can be obtained at the low temperature as compared with untreated dispensers so that the rate of pheromone release can be relatively uniform over the whole period of the season in which the pheromone dispensers are kept over the field.
REFERENCES:
patent: 4923119 (1990-05-01), Yamamoto et al.
Ogawa Kinya
Saguchi Ryuichi
Yamamoto Akira
Levy N.
Page Thurman K.
Shin-Etsu Chemical Co. , Ltd.
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