TREE DISEASES  - 1
(undergraduate and graduate students)

Categories: Under Control, 9-Letter Names, Money Money, Tree People, Strange Structures, In Living Color

$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 orchard disease can be controlled by a single spray at bud break.

PEACH LEAF CURL

$100 This fungus causes branch cankers.

CYTOSPORA

$200 This fungus causes perennial target canker.

EUTYPELLA

$300 This fungus causes a very common disease of Prunus.

DIBOTRYON

$400 This fungus produces apothecia from fruit mummies.

MONILINIA

$500 This fungus causes the most common canker of trembling aspen.

HYPOXYLON

$100 Losses to this disease limit the distance ripe peaches can be shipped.

BROWN ROT

$200 This disease is the limiting economic factor in pear growing in the eastern U.S.

FIRE BLIGHT

$300 This term describes when the cost of control equals the loss.

ECONOMIC THRESHOLD

$400 This disease destroyed an important forest products industry in the southeastern U.S. in the 1930's.

CHESTNUT BLIGHT

$500 According to the U.S. Forest Service this is the annual cost per tree of a successful DED control program in midwestern cities.

$ 3

$100 This Syracuse University professor wrote a forest pathology textbook.

MANION

$200 This pathologist first devised a system to predict infection risk using weather.

MILLS

$300 This Cornell tree pathologist published a book of color pictures of tree diseases.

SINCLAIR

$400 This Illinois pathologist did most of the early work on wetwood.

CARTER

$500 This 19th century German is considered the father of Forest Pathology.

HARTIG

$100 This structure occurs when apical dominance is lost.

WITCH'S BROOM

$200 This perennial structure forms a one-sided distortion on trunks of trees including maple, birch and oak.

TARGET CANKER

$300 This tree hosts a gnarly growth caused by a fungus and a mite.

HACKBERRY

$400 These tiny animals cause bright red swollen patches on leaves of maple.

ERIOPHID MITES

$500 This structure is believed to be the infection court for Aspen canker.

SAPERDA GALL

$100 This peach disease affects fruit, flowers and twigs.

BROWN ROT

$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

$500 This important apple disease is also known as frog eye leafspot.

BLACK ROT