PLPA 2010 1st Edition Lecture 7Outline of Last Lecture I. Toxic Black MoldOutline of Current Lecture II. Plant DiseasesIII.Potato FamineIV. Contributing FactorsV. PhytophthoraVI. This is the last lecture before prelim 1!Current Lecture- Plant Diseases:o 80% of plant diseases are cause by fungio They are specific in their tactics Attack one plant species Attack one part of the plant Plants aren’t passive they fight backo They are also viruses, bacteria, nematodes- Potato Famine Factso Potatoes arrived in Ireland in the late 1500’so Staple foodo Produce the highest yield on the least amount of lando Pretty nutritious with a balanced diet (need extra protein source)o Yield is underground, so farmer can conceal ito In Ireland, 4 kids would eat 252 pounds of potatoes per week!o Adults ate 12-14 pounds a day!- The Famineo Killed thousands of plants and peopleo Cause by an algae, not a funguso Anton de Bory discovered the cause: phytophthora- Contributing Factors:o Introduction of a new pathogeno Generally uniform potato cropo Cull piles left near the fields…source of diseaseo Government apathy… abuseThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Susceptible host, versatile pathogen, favorable weather- Phytophthora:o Cause of tragic potato famineo It makes hyphae and sporeso Has cellulose in cell wallso Spore have two tails (flagella) and can swimo Acts like a fungus: In mycology books DNA sequencing tells us that its quite different Doesn’t belong in the kingdom