Lecture 1 Flashcards

(21 cards)

1
Q

Define Bacterium:

A

Unicellular microorganism that lacks defined organelles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Bacteria may have another copy of their single chromosome, the second copy is called a _______.

A

Plasmid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A singe-celled bacterium with rippled cell wall is called _________.

A

Xylella fastidiosa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is Xylella fastidiosa?

A

A single-celled bacterium with rippled cell walls.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do bacteria reproduce?

A

They reproduce by binary fission….cells divide into 2 exact copies.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are some typical symptoms of bacterial pathogens?

A
  • Infect through natural opening or would
  • Angular borders
  • Chlorotic halo
  • Water soaked rot
  • Tissue blight
  • Rotten smell
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are some Bacterial Disease Management practices?

A

* Use disease free stock plants

  • Choose disease resistant cultivars
  • Create environmental conditions that do not favor disease
  • Eradicate affected plant material
  • Rotate Crops
  • Copper containing fungicides

(EXCLUDE & ERADICATE!)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Management and Control practices for Bacterial Blight:

A
  • Culture indexing
  • Sterilize Propagating areas
  • Use sterile planting materials
  • Use disease-free stock plants
  • Quarantine plants by source
  • Eradicate affected plant material

(EXCLUSION AND ERADICATION!!!)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Branch Dieback is also called ______.

A

“sheperds crook”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Management and Control of Fire Blight:

A
  • Spray copper fungicides
  • Use resistant varieties
  • Remove affected plant material
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is Phytoplasma?

A

A simpler form of bacteria that doesn’t have cell walls. They are vectored by leaf hoppers.

The diseases they cause are generally called “yellows”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Define Virus:

A

Ultramiucroscopic entity that contains genetic material within a protein coat that can only reproduce using the metabolic processes of a suitable host cell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does a virus reproduce?

A

Uses a host cell to make copies of itself.

Cannot reproduce without a host.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are typical symptoms of viral pathogens?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What was one of the first viruses that we started to study?

A

Tobacco Mosaic Virus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the typical symptoms of viral pathogens:

A
  • abnormal growth
  • abnormal color
  • look for the vector (what spreads the virus from plant to plant)
  • Symptoms can take a while to show up or dont show up at all
17
Q

What are the Vectors of a Virus?

A
  • Primary vectors are insects with piercing, sucking mouthparts
  • nematodes
  • fungi
  • mechanical
  • infected plant parts
18
Q

What are the Tospovirus Vectors?

A
  • Western Flower Thrips
  • Onion Thrips
19
Q

Tospovirus Management…..

A
  • Use disease free stock plants
  • Eradicate thrips
  • Eradicate affected plant material
  • Eradicate weeeds and alternate hosts
  • Quarantine plant material by source
20
Q

Thrips Management…

A
  • Monitor populations with sticky cards
  • Use petunia as a trap crop
  • Eradicate weeds and alternate hosts
  • Exclude thrips from outside house
  • Quarantine plant material by source
  • Make application of labeled insecticide
21
Q

What are the 3 types of parasitic plants?

A
  • Epiphyte - Orchid, Spanish Moss
  • Hemi parasite - Mistletoe
  • True parasite - Dodder, Witchweed, Dwarf mistletoe