疫霉属的几种菌几乎侵害胶树的所有地上部分一割面、茎干、枝条、果荚和叶片。在割面上造成的病害叫条溃疡,即致病菌在木质部上造成特有的黑色线纹。疫霉菌侵入树干原生皮而引起茎干溃疡是不大常见的。病菌造成绿色嫩枝顶死病则更是少见。由疫霉菌引起的最主要的病害是季风性落叶病和果腐病。 Several species of Phytophthora inflict almost all of the aerial parts of the gum tree, a cut surface, stems, branches, pods and leaves. The disease caused on the cut surface is called ulcer, which means that pathogenic bacteria cause unique black lines on the xylem. Phytophthora invading trunk primary skin and causing stem ulcers are uncommon. Germs cause death of green shoots are more rare. The main diseases caused by Phytophthora infestans are monsoon deciduous diseases and fruit rot.