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Diseases of Crops > Wheat Viruses > Flashcards

Wheat Viruses Flashcards

1
Q

Are wheat viruses important?

A

Yes, sometimes the single most reduction in yield is due to viruses in wheat.

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2
Q

When was Oat disease first reported?

A

1890

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3
Q

What are symptoms of oat disease? (2)

A

yellowing,

stunting

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4
Q

What does YDV stand for?

A

Yellow dwarf viruses

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5
Q

How are YDV transmitted?

A

Aphids

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6
Q

What is the host range of YDV?

A

cereal grains

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7
Q

What does BYDV stand for?

A

barley yellow dwarf virus

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8
Q

What is the most widely distributed virus of cereals in the world?

A

barley yellow dwarf virus

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9
Q

Where are the virons of barley yellow dwarf virus concentrated in the plant?

A

Phloem

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10
Q

What are symptoms of YDV? (2)

A

yellowing or reddening

plant stunting

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11
Q

What can change the symptoms of YDV?

A

Age of plant, location on plant, ???

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12
Q

How is BYDV transmitted?

A

by aphids after several hours of feeding and a four day latent period (persistent manner)

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13
Q

What does SBWMV stand for?

A

Soil-borne wheat mosaic virus

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14
Q

What is the vector of soil-borne wheat mosaic virus?

A

a fungus-like organism in the soil

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15
Q

What is a major symptom of soil-borne wheat mosaic virus?

A

Large patches in the field of infected plants, concentrated zones in the field

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16
Q

How is wheat mosaic virus transmitted?

A

Mites

17
Q

How is high plains disease transmitted?

A

Mites

18
Q

How is wheat streak mosaic virus transmitted?

A

Mites

19
Q

What three viruses in wheat are transmitted by Mites?

A

Wheat mosaic virus,
High plains disease,
Wheat streak mosaic virus

20
Q

What is the economic damage associated with wheat streak mosaic virus?

A

$80 million in Kansas in 2017

21
Q

What chemical can be used on wheat streak mosaic virus?

A

None available currently

22
Q

Do resistant varieties exist for wheat streak mosaic virus?

A

Yes

Diseases of Crops (11 decks)

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