贵阳地区栽培的番茄,每年一到雨季,就普遍发生果实腐烂,尤其是多雨的年份,发生最为严重,损失也最大,严重阻碍了番茄生产的发展。过去一直把番茄果实腐烂的原因,误认为是由于番茄晚疫病菌[PhytoPhthora infestans (Mont.)De Bary]侵染所致。近几年来,我们对田间番茄果腐,进行了认真的调查研究,发现此病原,除了一部分是晚疫病菌外,大部分是由番茄疫病菌[Phytophthora Growing tomatoes in Guiyang, a year to the rainy season, fruit decay occurs generally, especially in the rainy year, the most serious losses the largest, seriously hampered the development of tomato production. In the past, the cause of tomato fruit decay was mistakenly thought to be due to the infection by Phytohthora infestans (Mont.) De Bary. In recent years, we conducted a careful investigation on tomato rots in the field and found that most of these pathogens were caused by the pathogen Phytophthora apart from Phytophthora