Plant Pathology Jeopardy
TREE DISEASES - 2
(undergraduate and graduate students)
Categories: To the Rescue (Control), Tell the Doctor (Symptoms), Starts with a C, Those Darned Spores, Worth a Thousand Words, Whose Hue
TO THE RESCUE
$100 A fungicide which moves within the plant.
$200 Limiting bark-on firewood is a municipal control for this.
$300 This cultural practice can limit spruce branch canker.
TIMELY REMOVAL OF INFECTED BRANCHES
$400 Long distance dissemination of this vascular wilt can be limited by indexing of planting stock.
$500 This surgical procedure can be used to remove trunk cankers without destroying the infected tree.
TELL THE DOCTOR (symptoms)
$100 Yellowing of leaves.
$200 This structure occurs when apical dominance is lost.
$300 A dead area in the cambium starts out this symptoms.
$400 The characteristic symptoms of DED and similar diseases.
$500 The visual appearance of delayed graft incompatibility in walnut or prune.
STARTS WITH a “C”
$100 Pathogen causing spruce canker.
$200 Tree’s wound defense response in the wood.
$300 Brown __________ Rot.
$400 Woody fruiting body of a decay fungus.
$500 Oak wilt fungus.
THOSE DARNED SPORES
$100 Sources of ascospores causing primary infection in tarspot.
OVERWINTERED LEAVES ON GROUND
$200 Source of spores for vectored transmission of oak wilt.
MATS UNDER BARK OF RECENTLY KILLED TREES
$300 Source of blossom blight inoculum in fireblight.
$400 Diplodia shoot blight needs these to build up before it kills shoots.
$500 Two kinds of spores which can serve as primary inoculum in ash anthracnose.
WORTH A THOUSAND WORDS (show a picture)
$100 These spots likely to be biotic or abiotic.
BIOTIC (APPLE SCAB)
$200 Term for this symptom.
DOUBLE BONUS - THIS IS THE EARLY SYMPTOM OF WHAT DISEASE?
$300 This tree disease.
$400 This disease.
$500 This symptom.
$100 This discoloration of wood often precedes decay.
$200 This disease is very common on plum.
$300 This disease kills coconut palms.
$400 The name for this red-brown color is taken from the tree almost made extinct by an introduced disease.
$500 The kind of wood decay when both lignin and cellulose are degraded.
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Updated: July 7, 2001