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毛白杨雌株黄化病是河北省当前石灰质山地苗圃普遍存在的一种病害。为了解决我省生产中这一新问题,我们于1985年5月,对井陉县2年生黄化较为严重的苗圃进行了调查和防治试验,现将初步结果报道如下。 一、苗圃地概况 调查地在距县城西北10公里多的井陉苗圃。年平均气温为11.4℃,年降雨量512毫米,属于瞬温带大陆性季风气候。土壤为褐土,一般年份为前旱后涝。 二、病害调查 以随机取样的方法,对1984年嫁接的芽接苗和劈接苗进行了调查,结果如表1。
Populus tomentosa female plant yellow disease is currently a limestone mountain nursery in ubiquitous disease. In order to solve this new problem in the production of our province, we conducted a survey and prevention and control test on nurseries with more serious two-year-old yellowing in Jingxian County in May 1985, and the preliminary results are reported below. First, the general situation of the nursery survey in 10 kilometers northwest of the county well Jing Nursery. The annual average temperature of 11.4 ℃, annual rainfall of 512 mm, belongs to the transient temperate continental monsoon climate. Soil for the cinnamon, the general year before the drought floods. Second, the disease survey Random sampling method, 1984 grafted bud seedlings and split access seedlings were investigated, the results shown in Table 1.