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花木育苗常遭多种病害为害,如松、杉、橡树、银杏、香樟、楠木、油茶等,以及观赏草本植物的鸡冠花、翠菊、菊花、百日草、马蹄莲、紫罗兰等的幼苗在生长期间,常会受到猝倒病的侵染为害,发病的幼苗突然猝倒死亡,影响幼苗成活率,甚至全部毁苗,给苗木生产带来很大损失。1.选好圃地圃地最好选择地势较高、排水良好、避风向阳的沙壤地,苗床要选用无病地,最好在5年内未种
Seedlings of flowers and trees often suffer from a variety of diseases, such as pine, cedar, oak, ginkgo, camphora, Phoebe, Camellia, etc., and ornamental herbs such as celosia, aster, chrysanthemum, zinnia, calla, During growth, often subject to damping-off infection infestation, the sudden onset of sudden death catastrophe, affecting the survival rate of seedlings, and even destroyed seedlings, to seedlings produce a great loss. 1, select the best garden nursery land is best to choose a high-lying, well-drained, sheltered sunny sandy soils, seedbed to use disease-free, preferably not in 5 years