ROOT REPELLING PIPE JOINTS

摘要

Root repelling pipe joints are used to prevent intrusion of root into underground pipelines. The joints comprise an annular member formed of an organic polymer mixed with an effective amount of a dinitroaniline. The dinitroaniline slowly diffuses from the polymer at a sufficient rate to keep roots away from the joints but sufficiently slowly to cause the protection for many years without translocating within the plants and kill them.