Controlled release device for the preservation of wooden structure proximate soil where the controlled release device comprises a bound friable mixture in a polymeric matrix

摘要

A controlled release device for the prevention of the decay and deterioration of wooden objects caused by pests. The device, composed of polymers that incorporate pesticides, is placed proximate with the wood of the object to be protected. The pesticide is gradually released from the device and absorbed into the wood structure. The pesticide absorbed by the wood creates a barrier or an exclusion zone to penetration by insects. The controlled release device maintains a minimal effective level of pesticide in the barrier or exclusion zone for a predetermined period of time.