茶枝干溃疡病(Macrophoma theicolaPetch)在斯里兰卡的低地茶园近年来发展很快,在印度也有发生。此病危害茶树枝干有两种情况,一种是只引起分枝溃疡,另一种是侵染分枝后继续向主干扩散引起整株死亡。症状是首先在铅笔粗细的红色枝条上出现轻微凹陷的黑色病斑,病斑通常长椭园形,在枝干上纵向延长 Macrophoma theicolaPetch has developed rapidly in Sri Lanka’s lowland tea gardens in recent years and has also occurred in India. The disease endanger tea stems in two cases, one is only caused by branching ulcers, and the other is the proliferation of branches continue to cause the entire plant death after infestation. The symptoms are first of all slightly depressed black lesions on the red branches of the pencil thickness, with the lesions usually oblong in shape, longitudinally extending on the branches