The field trial of moso bamboo treated by 9 copper preservatives for 5 years in Guangzhou was conducted in the paper. The result shown that: two ammonia based copper azole formulations F17/F18 and 1 amine copper formulation with boron F10, as well as 2 ammonia based ACQ, at the copper retention of 3.2 kg/m3 or above, have good resistant for decay and fine resistant for termites after 5 year field test at local condition. The result of durability of ACQ-B treated moso bamboo is similar to that of masson pine and slash pine at the copper same retention.

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