茎腐病是危害兰花最严重的病害,兰花一旦被感染,如处置不当,轻则满盆枯死,重则危及整个兰苑的兰花生长。起因及症状茎腐病又称枯萎病、凋萎病,其病原菌为半知菌亚门尖孢镰刀菌。发病高峰在每年5～9月,最早发病可出现在2月。发病的典型症状是兰苗叶片从基部开始发黄,然后自下而上、自里而外迅速发展,往往兰草在短短1～2天内就枯黄干死,如用手触摸,整株兰草会 Stalk rot is the most serious diseases endangering orchids, orchids once infected, such as improper disposal, ranging from tub full of dead, while the endangered Orchid entire orchid growth. Causes and symptoms Stalk rot, also known as blight, wilt, the pathogen is Fusarium oxysporum spore Fusarium. Peak incidence in the annual 5 to 9 months, the earliest onset may occur in February. The typical symptom of the disease is that the leaves of young orchid seedlings start to yellow from the base, and then develop from the bottom up and from the inside out. Usually, the blue grass grows dead and dry in just 1-2 days. If touched by hand,