Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Turfgrass Diseases > Final - Section 3 > Flashcards

Final - Section 3 Flashcards

1
Q

What is the fugitive phenomena?

A
  • Fruiting bodies come and go without warning
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many different fungi cause fairy ring?

A
  • The total number is unknown
  • 11 are known in New Jersey
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How would we control a type-2 fairy ring?

A
  • apply nitrogen or iron to mask symptoms
  • remove fruiting bodies
  • aggressive aerification
  • applicationg of wetting agent and water it in
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the environmental parameters used to predict brown patch?

A
  • Warm Nights
    • Soil temperature > 61 deg
    • Air temperature > 59 deg.
  • Extended Leaf Wetness
    • 95% RH for > 10 hours
    • 0.1” of rain or irrigation in preceeding 36 hours
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Name the causal agents of Brown Patch and Yellow Patch.

A
  • Rhizoctonia solani*
  • Ceratobasidium cereale*
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Name the grass in which Brown Patch is the #1 disease.

A

it affects Colonail Bentgrass the worst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a common sign and common symptom of Brown Patch on bentgrass?

A

Symptom - irregular shaped leaf lesion that are tan in the center with a reddish brown border

Sign - Smoke ring of mycelium on the surface.

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

When is Yellow Patch active?

A

Cool Weather

45 - 65 degrees

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

Name the swimming spore and survival spore of a water mold.

A

Zoo Spore

Oospore

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

Why do Fungi have two names?

A

One is the Telemorph name and the other is their Anamorph name

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Name two weeds that are hosts of Yellow Tuft.

A

.Crab grass

Quack grass

Orchard grass

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

Name two fungicides that are effective control of pythium diseases.

A

Subdue

Segway

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

How does gray snow mold survive?

A

Wrinkled, Raisen-like Sclerotia survives in the thatch

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

Why is Pink Snow Mold a bad name for the disease?

A

Because it doesn’t need snow to infect a plant

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

How does Nitrogen affect snow molds?

A

If too much nitrogen is applied, it overstimulates the turf and makes it more susceptible to disease.

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

Draw the spore of Michrodochium nivale.

A

.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is unique about the mycelium of Typhula incarnata?

A

It is Septate Mycelium and has Clamp Connections.

18
Q

List the principles of plant disease control.

A
  • Exclusion
  • Eradication
  • Resistance
  • Protection
19
Q

Define “mode of action”

A

How an active ingredient interferes with the growth and metabolism of the pest

20
Q

List two fungicide tactics that help reduce resistance problems.

A

Tank Mix multiple fungicides

Rotate Fungicides

21
Q

What isa good combination of fungicides for Rust?

A

Daconil and Heritage

22
Q

What rust spore stage do we find on turf?

A

Stage 2 and 3

Urediospores are most common

23
Q

When is Dollar Spot most active?

A

Warm Days and Cool Nights

Optimal temps are 60 - 85 deg.

Overcast skies, fog, dew

8 - 12 hours of continuos leaf wetness

24
Q

Define the symptoms of Gray Leaf Spot.

A

Small, Oval, Gray colored leaf lesions that have a purple border

25
Q

What abiotic stress can anthracnose be easily confused with?

A

Drought Stress

26
Q

Name 3 contact fungicides.

A

Daconil

Captan

Medallion

Mancozeb

27
Q

Name 3 diseases that are problems under high fertility.

A

Typhula incarnata

Michrodochium nivale

Drechslera poae

28
Q

Name 3 diseases that are worse under short mowing.

A

Magnaporte poae

Geaumannomyces graminis

Rhizoctonia zeae

Waitea circinata

29
Q

Describe the symptoms of Yellow Tuft.

A

Dime sized yellow spots on turf that turn into dime sized dead spots.

30
Q

Name the primary symptom of Anthracnose.

A
  • General Thinning of turf,
  • Yellow if Poa and Bronze if Bentgrass.
31
Q

Why is it hard to control Anthracnose?

A

Becaue it is usually on the Putting Green.

Raising the HOC, minimizing mowing, adding nitrogen to promote growth and keeping traffic to a minimum is hard to do on a golf course that has different expectations.

32
Q

Describe the signs of Yellow Tuft.

A
  • aseptate mycelium
  • Sporangia that produce Zoospores
  • Oospores
33
Q

Name the favored host for anthracnose.

A

Poa annua

34
Q

What is the OLD genus name for Leaf Spot and Melting Out fungi?

A

Helminthosporium

35
Q

Describe the Brown Patch leaf lesion.

A

Irregularly shaped with a tan center and reddish-brown border

36
Q

What environmental condition increases Gray Leaf Spot?

A

Hot Days - Cool Nights

Extended Leaf Wetness

37
Q

Name two turfgrasses that are resistant to Summer Patch.

A

Cynodon

Zoysia

38
Q

Name two diseases that are worse at High pH.

A

Magnaporthe poae

Gaeumannomyces graminis

39
Q

Name 3 diseases that can be controlled by adding Nitrogen fertilizer.

A

Red Thread

Anthracnose

Leaf and Sheath Spot

40
Q

What golf course turf is a common host of Take-All?

A

.Agrostis spp.

41
Q

Describe the symptoms of Red Thread.

A

1 - 5” patches of Unthrifty, thinning turf

42
Q

Name the best two fungicides for Brown Patch.

A

Azoxystrobin

Pyraclostrobin

Turfgrass Diseases (22 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions