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一、香椿根腐病 多在夏秋阴雨天和排水不良的圃地或林地内发生。 防治方法： １．合理选择育苗地和栽植地。宜选肥沃、松软、排水良好的壤土。 ２．进行土壤消毒。用少量石灰撒入栽植穴内，拌匀后再栽植。 ３．选用壮苗。用５％的石灰水或０．５％高锰酸钾溶液浸根１５～３０ｍ
First, Toona root rot and more in summer and autumn rainy days and poor drainage in the land or woodland occurred. Prevention and treatment methods: 1. Reasonable selection of nursery and planting. Should choose fertile, soft, well drained loam. 2. Soil disinfection. With a small amount of lime scattered planting hole, mix well before planting. 3. Choose strong seedlings. Use 5% lime water or 0.5% potassium permanganate solution soaking root 15 ~ 30m