Sudies on the trannsmission of Phytophthora root rot of soybean had been carriedout with the soil debris and the seeds which came from natural diseased fields as well as thesoil and seeds which inoculated with the pathogen.

• 对带菌土壤、残体进行传病试验，研究了人工接种条件下种子带菌条件及带菌种子传病情况，结果表明，带菌土壤和病残体无论是在当年还是越冬后都可有效地传播大豆疫霉根腐病，是大豆疫霉根腐病的主要初侵染源和传播途径。