PLPA 200 Lecture Notes - Lecture 3: Plasmopara Viticola, Phytophthora Infestans, Downy Mildew

• School: University of Illinois
• Department: Plant Pathology
• Course: PLPA 200
• Professor: Eastburn Darin

Document Summary

To enable them to colonize new hosts, plant pathogens have had to evolve various mechanisms for moving from infected plants to healthy ones. Some of these mechanisms allow pathogens to spread a few feet to neighboring plants, while others allow pathogens to be carried hundreds of miles to infect plants in new locations. Agricultural activities of humans have simpli ed the process of short distance disease spread, moving from one plant to another in the same eld. People tend to grow the same kinds of plants close together, to make planting and harvesting easier, but this also makes it easier for plant diseases to spread. People also physically carry pathogens from one plant to another on their hands and clothing and tools, or when they are working in the elds, orchards or gardens. Many plant pathogens can be easily transported long distances in or on plants, pant parts, or plant products.