继1987年11月在宜丰县森林苗圃当年生的马尾松苗上发现肿茎病后,今年6月我们在石市乡油茶林场的松林中进行病害调查时,在一株6年生的马尾松幼树上,又发现了这种病害。其发病的症状和在苗木上表现的症状极为相象,(《江西林业科技》1988年第3期)。发病的枝条一般距顶芽1 0—15厘米处开始向上肿大,呈纺锤形或圆锥形,肿大部分长度3—12厘米不等,其直径比正 Following the discovery of swollen stem disease on masson pine trees grown in the forest nursery of Yifeng County in November 1987, we conducted a disease survey in the pine forests of the Camellia Forest Farm in Shixiang Township in June this year. After a 6-year-old masson pine tree On the discovery of this disease again. The symptoms of the disease and the performance of the seedlings are very similar to the symptoms (Jiangxi Forestry Science and Technology, 1988 No. 3). The incidence of branches generally 10 to 15 cm from the top bud began to enlarge upward, was spindle or conical, swollen most of the length of 3-12 cm, the diameter is more positive