Abstract:

In order to improve tomato late blight pathogen colony growth rate and spore production quantities, this research cultured the separated, purificated late blight pathogen from Jamusi local tomato late blight plants, respectively in different media, pH, sugar concentration, temperature conditions, then researched tomato late blight pathogen growth and the best yielding the spore colonies conditions. The results showed that the rye culture medium was suitable for the colony growth and sporulation, the most suitable pH value for the colony growth was 6.0-7.0, the most suitable pH value for the sporulation was 6.5, and the optimum temperature for spore growth was 20℃. When the medium contained 80 g/L sucrose, the colony grew fastest and sporulation was also the greatest.