Deck 26: Plant Injuries: Identification and Care

Question 1

Things that impair the healthy growth and maturation of a plant are considered injurious agents.

Answer 1

True

Question 2

When a plant shows, through observation, that something is wrong, what we are witnessing is the plant's response to some type of irritant.

Answer 2

True

Question 3

When a plant turns yellow due to a lack of light, it is said to be chlorotic.

Answer 3

False

Question 4

Eradication is a principle that serves as a preventative measure for insect infestation.

Question 5

Dusts are pesticide formulations that are applied with water.

Question 6

Weeds injure landscape plantings both visually and culturally.

Question 7

Plant pests can be brought into a landscape setting from suppliers with poor production hygiene.

Question 8

All or part of a plant may be reduced in size by disease or insects.

Question 9

Weeds produce very few seeds because of a limited reproductive capacity.

Question 10

Chemical sprays, dusts, and drenches are generally the least expensive method of eradication.

Question 11

What explains the change of caterpillars into moths and butterflies?

A) transformation
B) metamorphosis
C) migration
D) mutation

Question 12

What natural forces often promote the spread of pests from plant to plant?

A) wind
B) splattering rain
C) sunlight
D) both "wind" and "splattering rain"

Question 13

What symptom describes yellowing even though the plant has received adequate light?

A) etiolation
B) chlorosis
C) drowning necrosis
D) fading

Question 14

When plant tissue turns black and dies, what symptom is expressed?

A) necrosis
B) chlorosis
C) blight
D) None of these asnwers is correct

Question 15

The seed of a fungus is called what?

A) tuber
B) bacterium
C) spore
D) mushroom

Question 16

Logically, what principle of control is first applied to keep plants free of pests?

A) eradication
B) containment
C) resistance
D) exclusion

Question 17

What describes a chemical that kills some plants and not others?

A) discriminating
B) selective
C) nonselective
D) weak

Question 18

What is the formulation of a pesticide that is not water soluble but must be applied in a water carrier?

A) emulsifiable concentrate
B) gel
C) granules
D) fumigant

Question 19

What chemicals are used against weeds to eliminate or destroy them?

A) nematicides
B) fungicides
C) bactericides
D) herbicides

Question 20

What system in the plant allows water to move up and down the stem?

A) reproductive system
B) leaves
C) roots
D) vascular system

Question 21

A ____________________ is an organism that cannot manufacture its own food.

Question 22

Bacteria, fungi, viruses, and other agents that cause plant diseases are collectively called ____________________.

Question 23

When fungi invade the tender stem of a young seedling, the disease ____________________ develops.

Question 24

When infected plants are removed from the landscape and destroyed, the principle of ____________________ has been applied.

Question 25

Nematicides are pesticides used to control ____________________.

Question 26

A pesticide that will kill a pest that is presently on or in the plant and actively injuring it is termed an ____________________.

Question 27

IPM is an abbreviation for a control technique known as ____________________.

Question 28

Herbicides that kill weeds before they emerge through the soil are termed ____________________.

Question 29

Patterned symptoms, as opposed to randomly located symptoms, are often indicative of ____________________.

Question 30

Insects or slugs that feed at night and hide by day are termed ____________________.