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杉木缩顶病为害枝、梢顶芽和主梢,症状大体可分4种类型:1.侧枝顶芽感病枯死;2.主梢顶芽枯死,偶而发生梢枯,枝梢丛生;3.主梢顶芽感病后,不定芽大量萌生并相继感病,以致植株顶端萎缩,停止生长;4.枝梢顶芽正常,但其上可产生数个溃疡斑,病斑不扩展,不引起枝梢枯死。经组织分离和接种试验,主要病原菌为Pestalotiopsis guepini,其次是Fusarium oxysporum。
Cunninghamia lanceolata damage branches, shoots and the main tip of the tip, the symptoms can be divided into four types: 1. The top of the buds of the disease dead; 2. The top of the shoots dead bud, occasionally withered shoots, branches shoots; After the top shoots of the main shoots are susceptible, the adventitious buds are sprouted in large numbers and are susceptible to the disease, resulting in the top of the plant shrinking and stopping the growth. 4. The shoots of the shoots are normal, but there are several ulcer spots on the shoots. The lesion does not expand, Dead branches. After tissue isolation and inoculation test, the main pathogen was Pestalotiopsis guepini, followed by Fusarium oxysporum.