漆树炭疽病发生普遍,我省利川、恩施、罗田等县的苗圃地均有发生,发病率一般在5%左右,严重的高达80%以上;该病除为害一、二龄树苗外,亦为害三龄以上的幼、壮龄漆树。本文对病害的侵染循环和发病因素,农业防治和化学防治等进行了试验研究。 一、为害与症状 四龄以下的漆树最易感染炭疽病,但以苗圃发病最烈。据1979年在利川县忠路公社漆场调查,200株漆苗中有170株发病,发病率85%;文斗公社漆场670株漆苗,有650株 Arborvitae occurs generally, the province Ichikawa, Enshi, Luotian County Nursery have occurred, the incidence is generally about 5%, severe up to 80% or more; the disease in addition to damage the first and second instar saplings Damage more than the third age of young, strong age tree paint. In this paper, the infection cycle and disease factors, agricultural control and chemical control were tested. First, the damage and symptoms Most of the trees under the age of four infected with anthracnose, but the nursery was the most severe. According to a survey conducted by Zhongzhong Commune in Lichuan County in 1979, 170 strains of 200 paint seedlings were found, with a prevalence of 85%. There were 670 paint seedlings in Wen Bu Commons’