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

$100 A fungicide which moves within the plant.

SYSTEMIC

$200 Limiting bark-on firewood is a municipal control for this.

DED

$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.

VERTICILLIUM

$500 This surgical procedure can be used to remove trunk cankers without destroying the infected tree.

EXCISION

$100 Yellowing of leaves.

CHLOROSIS

$200 This structure occurs when apical dominance is lost.

BROOM

$300 A dead area in the cambium starts out this symptoms.

CANKER

$400 The characteristic symptoms of DED and similar diseases.

WILT

$500 The visual appearance of delayed graft incompatibility in walnut or prune.

BLACKLINE/BROWNLINE

$100 Pathogen causing spruce canker.

CYTOSPORA

$200 Tree’s wound defense response in the wood.

COMPARTMENTALIZATION

$300 Brown __________ Rot.

CUBICAL

$400 Woody fruiting body of a decay fungus.

CONK

$500 Oak wilt fungus.

CERATOCYSTIS

$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.

HOLDOVER CANKERS

$400 Diplodia shoot blight needs these to build up before it kills shoots.

CONES

$500 Two kinds of spores which can serve as primary inoculum in ash anthracnose.

ASCOSPORES, CONIDIA

$100 These spots likely to be biotic or abiotic.

BIOTIC (APPLE SCAB)

$200 Term for this symptom.

SHOTHOLE

DOUBLE BONUS - THIS IS THE EARLY SYMPTOM OF WHAT DISEASE?

X

$300 This tree disease.

DED

$400 This disease.

PLUM POCKETS

$500 This symptom.

FASCIATION

$100 This discoloration of wood often precedes decay.

BLUE STAIN

$200 This disease is very common on plum.

BLACK KNOT

$300 This disease kills coconut palms.

LETHAL YELLOWING

$400 The name for this red-brown color is taken from the tree almost made extinct by an introduced disease.

CHESTNUT BLIGHT

$500 The kind of wood decay when both lignin and cellulose are degraded.

WHITE ROT