lecture 5

lecture 5 - 9/1/10 Introductory Plant Pathology BTNY...

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Unformatted text preview: 9/1/10 Introductory Plant Pathology BTNY 301 R. D. Martyn Fall, 2010 Lecture #5 How do pathogens spread and survive? RD Martyn, Purdue University 1 How do plant pathogens spread? •  ___________________ •  __________________________________ •  ________________________________________ ________________________________________ •  ____________________ •  ________________________________________ __________________________________________ •  _______________________________________ •  _______________________________________ RD Martyn, Purdue University 2 1 9/1/10 Soybean Rust Worldwide 2004 ? 2002 1996 1998 2001 1902 2004 2003 2001 2004 R. D. Martyn, Purdue University 3 IntroducOon of soybean rust into the U.S. Hurricane tracks: Aug  ­ Sep, 2004 RD Martyn, Purdue University 4 2 9/1/10 Tropical storm winds reached out 220 miles Hurricane Ivan  ­ Sept 7, 2004 RD Martyn, Purdue University 5 EsOmated spore deposiOon: September 19, 2004 RD Martyn, Purdue University 6 3 9/1/10 Soybean Rust in the U.S. Nov 11  ­ Dec 1, 2004 RD Martyn, Purdue University 7 Pathogens are spread around the world on ______________________ RD Martyn, Purdue University 8 4 9/1/10 Pathogens spread by the wind •  _______________ (Phakopsora pachyrhizi) China –> Australia –> Africa –> South America –> U.S. •  ________________ (Hemileia vastatrix) Sri Lanka –> Africa –> South America –> Central Am. •  _________________ (Pucinnia graminis tri9ci) Mexico –> U.S  ­> Canada RD Martyn, Purdue University 9 __________________ RD Martyn, Purdue University 10 5 9/1/10 ______________ •  Aphids, leaaoppers, psyllids, beetles, etc. Aphids Leaaoppers Psyllids Beetles RD Martyn, Purdue University 11 _____________________ RD Martyn, Purdue University 12 6 9/1/10 How do plant pathogens survive? 1.  _____________________________________ Oopsore Cysts Chlamydospore RD Martyn, Purdue University ScleroOum (ia) Perithecia 13 How do plant pathogens survive? 2. _________________________________________ Seeds – Fusarium wilt (Fusarium oxysporum) Potato tubers Cankers – white pine blister rust (Cronar9um ribicola) RD Martyn, Purdue University 14 7 9/1/10 How do plant pathogens survive? 3. ____________________________________ Perithecia – Fusarium head blight of corn (F. graminearum) Moldboard Ollage RD Martyn, Purdue University 15 How to plant pathogens survive? 4. ______________________________________ RD Martyn, Purdue University 16 8 9/1/10 How do plant pathogens survive? 5. _________________________________________ Aphids Corn flea beetle – Stewart’s wilt of corn. [Pantoea (Erwinia) stewar9i] Leaaopper RD Martyn, Purdue University 17 How do pathogens survive? •  Many do not! They have to be introduced each season. •  How do they get reintroduced? –  _____________________________________ –  _____________________________________ –  _____________________________________ –  _____________________________________ –  _____________________________________ RD Martyn, Purdue University 18 9 9/1/10 Outside Reading List Lecture #6 •  A.K. Vidaver & P.A. Lambrecht Bacteria as plant pathogens hjp://www.apsnet.org/educaOon/IntroPlantPath/PathogenGroups/bacteria/default.htm Lecture #7 •  Dan Egel. Vegetable Crops Hotline. (Issue 499, Sept 05, 2008) Bacterial canker of tomato and Angular leaf spot of cucumber. hjp://www.btny.purdue.edu/pubs/vegcrop/index2008.html •  Johnson, K.B. 2000. Fire blight of apple and pear. The Plant Health Instructor DOI: 10.1094/PHI ­I ­2000 ­0726 ­01 hjp://www.apsnet.org/educaOon/LessonsPlantPath/FireBlight/default.htm •  Kado, C.I. 2002. Crown gall. The Plant Health Instructor. DOI:10.1094/PHI ­I ­2002 ­1118 ­01 hjp://www.apsnet.org/educaOon/LessonsPlantPath/CrownGall/default.htm •  Gojwald, T.R. 2000. Citrus canker. The Plant Health Instructor. DOI: 10.1094/PHI ­I ­2000 ­1002 ­01 hjp://www.apsnet.org/educaOon/LessonsPlantPath/CitrusCanker/default.htm •  Walcoj, R.R. 2005. Bacterial fruit blotch of cucurbits. The Plant Health Instructor. DOI: 10.1094/PHI ­I ­2005 ­1025 ­02 hjp://www.apsnet.org/educaOon/LessonsPlantPath/BacterialBlotch/default.htm RD Martyn, Purdue University 19 www.APSnet.org Plant Disease Lessons RD Martyn, Purdue University 20 10 9/1/10 APSnet – EducaOon Center RD Martyn, Purdue University 21 APSnet – Plant Disease Lessons 11 9/1/10 APSnet – Plant Disease Lessons APSnet – Plant Disease Lessons 12 9/1/10 Exam #1 Thursday, September 17, 2009 Lectures 1 ­7 Textbook readings Outside readings ObjecOve quesOons (T/F; Fill ­in ­blank; Matching; MulOple Choice; Diagrams; etc.) •  Taken during the laboratory session •  Review on Thursday morning •  •  •  •  RD Martyn, Purdue University 25 13 ...
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