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Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
Diagnosing Plant Problems2009
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Diagnosing Plant Problems2009

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Presentation used in general and plant health advisor training.

Presentation used in general and plant health advisor training.

Published in: Technology, Self Improvement
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  1. Plant Health Advising:<br />Mike Maddox<br />Horticulture Educator, Rock County UW-Extension<br />Director of Education, Rotary Botanical Gardens<br />
  2. Plant health advising<br />Diagnosing plant problems<br />Plant identification<br />Pest identification <br />Insect<br />Disease<br />Animal<br />
  3. What’s this plant?<br />What’s killing this plant?<br />Typical submission<br />
  4. What’s the problem? The 7 S’s<br />Symptom<br />Sign<br />Species<br />Site<br />Spread<br />Season<br />(hi)Story<br />
  5. Symptom<br />Plant response to biotic or abiotic factors<br />Biotic (living)- pathogen, insect, animal…<br />Abiotic (non living)- weather, chemical, nutrient…<br />
  6. Symptom<br />Chlorosis<br />Necrosis<br />Wilting<br />Distorted growth<br />Lack of flowering/fruit-set<br />Vascular discoloration<br />Wood/stem discoloration<br />Root health<br />
  7. Symptoms<br />One disease affecting multiple plant parts<br />Phytopthora<br />
  8. Sign<br />Physical “clue” to causal agent<br />Evidence of feeding or activity.<br />
  9. Signs<br />Cynipid gall wasp<br />Missing materials<br />Insect presence<br />Animal tracks<br />Bite marks<br />Webbing<br />Egg masses<br />Galls<br />Wound tissue<br />Euonymus webworm<br />
  10. Finding an Answer: The 7 S’s<br />Species<br />Many disorders are species specific<br />Variety or cultivar<br />
  11. Finding an Answer: The 7 S’s<br />Dutch Elm Disease (photo)<br />Apple scab<br />Cedar-Apple rust<br />Oak wilt<br />Ash yellows<br />Aster yellows<br />
  12. Finding an Answer: The 7 S’s<br />Site<br />Environmental conditions the plant is growing in<br />
  13. Diagnosing plant problems: the 7 ‘S’s<br />Spread<br />Distribution of signs and symptoms throughout the planting or landscape<br />Distribution of signs and symptoms on plant(s)<br />
  14. Diagnosing plant problems: the 7 ‘S’s<br />Spread<br />Symptom progression<br />Movement through plant<br />Top to bottom<br />Bottom to top<br />Inside to out<br />Outside to in<br />Side to side<br />Placement on plant<br />Just one side<br />Certain aged leaves<br />Certain sized branches<br />Parts affected<br />
  15. Diagnosing plant problems: the 7 ‘S’s<br />Season<br />Time of year symptoms/signs first started occurring<br />Growth stage of plant<br />
  16. Diagnosing plant problems: the 7 ‘S’s<br />(hi)Story<br />What is the history of the site?<br />What is the history of the plant?<br />
  17. Diagnosing plant problems: the 7 ‘S’s<br />(hi)Story<br />Soil type and fertility<br />Handling of the plant<br />Fertility management<br />Chemical use<br />Culture (mulches, watering, etc.)<br />Weather conditions<br />Construction<br />
  18. Problem Solving Summary<br />Use a systematic approach<br />Identify the plant<br />Know what ‘normal’ looks like<br />Inspect the plant for overall vigor<br />Check surrounding plants; look for patterns<br />Look for signs<br />Look at symptoms<br />Review cultural practices<br />Examine root system<br />Evaluate plant’s microclimate<br />May need soil, plant tissue test, or the help of an expert!<br />
  19. Getting help<br />Your county university Extension office<br />Botanic garden reference libraries <br />Garden centers<br />Hired professionals<br />Internet<br />Books<br />TV/radio<br />
  20. UW-Extension Resources<br />Rock Co. UW-Extension<br />http://rock.uwex.edu<br />UW Green Industry Website<br />http://greenindustry.uwex.edu/<br />Plant Doc- Distance Diagnostic Website<br />http://www.uwex.edu/ces/ag/plantdoc/<br />Weed ID and Management<br />http://www.weedid.wisc.edu/<br />Plant Disease Diagnostic Clinic<br />http://www.plantpath.wisc.edu/pddc/<br />Turf Diagnostic Lab<br />http://www.plantpath.wisc.edu/tdl/<br />Insect Identification Lab<br />http://www.entomology.wisc.edu/entodiag.html<br />Soil and Plant Analysis<br />http://uwlab.soils.wisc.edu/<br />
  21. Other sources<br />Wisconsin Pest Bulletin<br />http://pestbulletin.wi.gov/<br />
  22. Diagnosing the Problem<br />Species: White Pine<br />Symptoms: Dead needles<br />Signs: none<br />Spread: All on one side of plant, all pines in area<br />Season: Early spring<br />Site: Rotary Gardens, adjacent to prairie<br />Story: Prairie burned in weeks prior<br />
  23. Diagnosing the Problem<br />Species: Austrian pine<br />Symptoms: Yellowing of needles<br />Signs: NA<br />Spread: All pines in area; older needles<br />Season: began in September<br />Site: Rotary Botanical Gardens<br />Story: …..<br />
  24. Annual needle loss in pine<br />
  25. Diagnosing the Problem<br />Species: Mugo Pine<br />Symptoms: Dying plants, soft brown roots<br />Signs: White mycelia on roots<br />Spread: All plants on east side of home<br />Season: mid-summer<br />Site: 4” crushed granite + plastic fabric<br />Story: Watered heavily due to needle loss!<br />
  26. Diagnosing the Problem<br />Species: Blue Spruce<br />Symptoms: Discoloration of last season’s growth<br />Signs: Stipling of needles?<br />Spread: Primarily single tree, others<br />Season: Noticed first last summer<br />Site: 8 year old landscape, trees in turf<br />Story: Low maintenance landscape<br />
  27. N% for typical Blue spruce: 1.50 – 2.10<br />Current season’s growth: 1.09 % N<br />Last season’s growth: 0.82 % N<br />
  28. Diagnosing the Problem<br />Species: Black Locust<br />Symptoms: Browning of leaves<br />Signs: none?<br />Spread: Single tree<br />Season: Droughty season, mid summer<br />Site: Mixed landscape adjacent to church parking lot<br />Story: Sudden onset of symptoms<br />
  29. Diagnosing the Problem<br />Species: Viburnum, multiple species<br />Symptoms: dead tissues<br />Signs: none?<br />Spread: all plants of cultivar in one block<br />Season: NA<br />Site: commercial cut flower farm on south facing slope<br />Story: 2008 and 2009 showed symptoms; planted in 2003.<br />
  30. Viburnumtrilobum<br />ViburnumopulusCompactum<br />ViburnumOpulusCompactum ???<br />
  31. Diagnosing the Problem<br />Species: Maples, mostly silver<br />Symptoms: black spots, early leaf drop<br />Signs: red lumps<br />Spread: all over the tree, mostly bottom<br />Season: spring<br />Site: everywhere<br />Story: cool humid spring<br />
  32. Maple bladder galls<br />Venturia leaf blotch<br />
  33. Diagnosing the Problem<br />Species: Tomatoes<br />Symptoms: wilting leaves<br />Signs: none<br />Spread: whole plant, all plants<br />Season: summer<br />Site: home garden, walnut tree nearby<br />Story: cool dry year<br />
  34. Avoiding Plant Problems<br />Practice PHC, including IPM<br />Right plant, right place<br />Timely scouting<br />Know your resources<br />You may narrow down possibilities<br />Labs may be needed for 100% confirmation<br />Sometimes, you can’t find an answer<br />REMEMBER, many pests are easier prevented than cured.<br />

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