杜仲(Evcommia vlmoides oliv)是我国独优于世界的特用经过树种,树皮为名贵中药材,经济价值高。过去,剥皮沿用伐树挖蔸法,往往造成资源枯竭,蓄皮量逐年下降。近年国内虽兴起环剥研究,多着眼于防止新皮坏死的生理致因,未触及病虫害因素。我场自1975年研究环剥,少数植株取得成功。1984—1986年重新试验,并开展了病虫害索原治本办法,实践证 Eucommia (Evcommia vlmoides oliv) is unique to the world through our tree species, bark for the expensive Chinese herbal medicines, high economic value. In the past, the use of dehulled trees to dig law, often resulting in depletion of resources, the amount of hide declining year by year. In spite of the rise of girdle research in China in recent years, we focused more on the physiological causes of neovascular necrosis and did not touch on pest and disease factors. My field since 1975 to study girdling, a few plants to succeed. 1984-1986 years to re-test, and carried out the original pest control method and practice certificate