Chapter 15 Flashcards

(32 cards)

1
Q

Why is it important to consider how controlling insects and mites will impact beneficial insects and mites in an area?

A

Killing off harmful insects can also kill beneficial insects, harming the ecosystem.

One example of a beneficial insect is the ladybug, which eats aphids and reduces the need for pesticides.

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2
Q

What does IPHM stand for?

A

IPHM stands for Integrated Plant Health Management.

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3
Q

What are the five distinct categories of IPHM?

A

The five categories are cultural practices, chemical applications, genetic host resistance, biological controls, and government regulatory measures.

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4
Q

What is a cultural control in IPHM?

A

Cultural controls involve manipulating the physical environment to benefit crops.

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5
Q

What are chemical applications in IPHM?

A

Chemical applications include herbicides, pesticides, miticides, and fungicides.

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6
Q

What is genetic host resistance?

A

Genetic host resistance involves developing crops that are resistant to specific pests or diseases.

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7
Q

What are biological controls?

A

Biological controls use natural predators to manage pest populations.

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8
Q

What is government regulation in IPHM?

A

Government regulation involves measures like quarantines to control invasive species.

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9
Q

What are the three ways in which genetically resistant plants occur?

A

Genetic resistance can occur through repeated exposure, human gene manipulation, and selective breeding.

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10
Q

What are the four classifications of herbicides based on timing of application?

A

The classifications are burn-down herbicides, preplant herbicides, pre-emergence herbicides, and post-emergence herbicides.

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11
Q

Why is understanding the mode of action of an herbicide important?

A

It helps prevent resistant biotypes from forming and allows for better management of herbicide-resistant weeds.

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12
Q

What is the threshold level in pest management?

A

The threshold level refers to an infestation level below which economic value is not compromised.

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13
Q

Which invasive weed species was introduced from Japan to control soil erosion?

A

Kudzu was introduced from Japan to control soil erosion.

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14
Q

What happens if weeds and crops coexist?

A

Competition for resources will negatively impact crop yields.

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15
Q

What is a biotype?

A

A biotype is a subpopulation of plants within a species that differs slightly from the general population.

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16
Q

What cultural weed control method has been tried in almost every environment?

17
Q

What percentage of known animal species does the class Insecta contain?

A

The class Insecta contains over 80 percent of all known species of animals on earth.

18
Q

What are the four classifications of herbicides based on timing of application?

A

The four classifications are burn-down, preplant, pre-emergence, and post-emergence.

19
Q

What is the mode of action used in insect traps?

A

The mode of action used in insect traps is pheromones.

20
Q

Which insect has been kept out of the United States mainland due to government controls?

A

The Mediterranean Fruit Fly has been kept out due to government regulatory controls.

21
Q

Which vertebrate is known to eat dried fruits and stored grains?

A

Rodents are known to eat dried fruits, stored grains, and unharvested vegetables.

22
Q

Do abiotic diseases spread from one plant to another?

A

False. Abiotic diseases are noninfectious.

23
Q

Do biotic diseases spread from one plant to another?

24
Q

When will biotic diseases fail?

A

Biotic diseases will fail when a susceptible host is not found.

25
What is visible during the final stage of a disease?
Necrotic plant tissue is visible during the tissue death stage.
26
What pathogens are responsible for most biotic plant diseases?
Pathogens include viruses, bacteria, spiroplasmas, phytoplasmas, fungi, fungal-like organisms, nematodes, and parasitic higher plants.
27
Are insects with piercing mouthparts important vectors of plant viruses?
True.
28
How do viruses and bacteria differ in terms of their pathogenicity?
Viruses are intercellular pathogens, while bacteria are considered intracellular pathogens.
29
Which infectious plant disease organisms can be both beneficial and detrimental?
Bacteria and viruses can be both beneficial and detrimental.
30
Do plant parasitic nematodes attack animals and humans?
False. They do not attack roots, stems, and foliage of plants.
31
What is LD50 expressed in?
LD50 is expressed in milligrams of the chemical per kilogram of body weight of the test animal.
32
What year did the first herbicide resistance plant become available?
1991