Terminology Test 1

Question 0

Symptoms

Answer 0

Result of disease; morphological changes; spots, yellowing, stunting, gall

Question 1

Disease

Answer 1

Dynamic interaction between an organism and its environment which results in abnormal physiological morphological or neurological changes

Question 2

Signs

Answer 2

Often but not always present with disease; organism parts or products; ex rust spores, powdery mildew

Question 3

Necrosis

Answer 3

Death of tissue

Question 4

Pathogen

Answer 4

Organism that causes disease; pathogen does not equal disease

Question 5

Parasite

Answer 5

Relies on host for nutrition/food; some pathogens are parasites

Question 6

Biotroph/ obligate parasite

Answer 6

Pathogen that requires living host tissue

Question 7

Necrotroph/ saprophyte

Answer 7

Pathogens that obtain nutrients from non living host tissue

Question 8

Facultative saprophyte

Answer 8

Has the ability to survive off debris

Question 9

Facultative parasite

Answer 9

Has ability to be a parasite

Question 10

Polycycles

Answer 10

Cycles with repeating cycle (most plant diseases)

Question 11

Primary inoculum

Answer 11

From survival stage

Question 12

Secondary inoculum

Answer 12

From repeating cycles

Question 13

Growth regulators

Answer 13

Act like hormones on plants, very low concentrations; pathogens produce compounds like these

Question 14

Gibberlins

Answer 14

Why you so tall? Foolish seedling disease of rice

Question 15

Ethylene

Answer 15

Facilitate maturation, senescence, ripening; pathogen can produce this early

Question 16

Vector

Answer 16

Something that moves a pathogen to its host