Tree diagnosis

Question 1

Growth reduction of organisms specifically plants

Answer 1

Stunting

Question 2

Leaf feeding damage caused by insects characterized by the loss of tissue between the leaf veins

Answer 2

Skeletonized

Question 3

A chemical effect or inhibition of growth or development of plants that is induced by allelochemicals

Answer 3

Allelopathy

Question 4

Area of wood that is undergoing decomposition (bacteria or fungi)

Answer 4

Decay

Question 5

Process that occurs in the presence of oxygen

Answer 5

Aerobic

Question 6

A localized diseased area on stems, roots and branches . Often shrunken and discolored

Answer 6

Canker

Question 7

The causal agent of disease usually microrganisms

Answer 7

Pathogen

Question 8

Disorders that are not caused by a pathogen and cannot be passed from one host to another

Answer 8

Non infectious

Question 9

Any disease or disorder that kills young plant tissues

Answer 9

Blight

Question 10

A loss of leaves from a tree or other plant by biological or mechanical means

Answer 10

Defoliation

Question 11

A whitish or yellowish leaf discoloration caused by lack of chlorophyll. Often cause by nutrient deficiencies

Answer 11

Chlorosis

Question 12

An irregullarly shaped area of disease on plant foilage

Answer 12

Leaf blotch

Question 13

In plants, a disorder not directly caused by an insect, pathogen or injury

Answer 13

Physiocological disorder

Question 14

A browning and shriveling of foilage especially on the leaf margin

Answer 14

Scortch

Question 15

A plant reaction to a disease or disorder (eg wilting(.contrast with sign

Answer 15

Symptom

Question 16

In pathology, biotic or abiotic agent that transmits a pathogen

Answer 16

Vector

Question 17

A disease caused by a certain group of fungi and characterized by reddish brown spots on the foilage and or the formation of stem galls

Answer 17

Rust

Question 18

Patches of disease or other damage on plant foilage

Answer 18

Leaf spot

Question 19

A microscopic roundworm. Some beneficial some cause damage

Answer 19

Nematode

Question 20

Physical evidence of causal agent (eg borer hole, frass) contast w symptom

Answer 20

Sign

Question 21

Any various fungi of the genus erysiphe that produce powdert conidia that appear as white, fuzzy coating on the upper leaf surfaces often causing distortion of the leaf

Answer 21

Powdery mildew

Question 22

A darkening of the vascular tissues of woody plants in response to disease

Answer 22

Vascular discoloration

Question 23

Substance that moves throughout organismadter it is absorbed, any disease or pest that affects entire organism

Answer 23

Systematic

Question 24

Capable of being spread to plants by other plants

Answer 24

Infectious

Question 25

A combination of factors contributing to the stress or decline of a tree

Answer 25

Complex

Question 26

A disorder or disease that occurs suddenly over a short period of time. Contras w chronic

Answer 26

Acute

Question 27

A localized death of tissue in a living organism

Answer 27

Necrosis

Question 28

A disorder caused by an infectious living agent

Answer 28

Biotic disorder

Question 29

A disorder or disease occurring over a long period of time. Contrast w acute

Answer 29

Chronic

Question 30

A fungus that appears as a black coating on the surface of leaves, fruits and other surfaces. Often found on sugary honeydew excreted by aphids

Answer 30

Sooty mold

Question 31

A transition zone from trunk to roots where the trunk expands. Root flare

Answer 31

Trunk flare

Question 32

A vertical split in the wood of a tree near the base of the bole caused by internal stress and low temperatures. Radial shake

Answer 32

Frost crack

Question 33

An abnormal swelling of plant tissues caused by gall wasps, mites nematodes and less commonly fungi or bacteria

Answer 33

Gall

Question 34

A plant disorder characterized by a shortening of the internodes and a proliferation of terminal shoots forming a dense brashlike mass of twigs

Answer 34

Witchs broom

Question 35

1. Loss of turgor and subsequent drooping | 2. Infectious disease that causes host to lose turgor

Answer 35

Wilt

Question 36

A condition in which the branches in the tree crown die from the tips toward the center

Answer 36

Dieback