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ENVS 2040 > Lec 6 > Flashcards

Lec 6 Flashcards

1
Q

Who is Anton De Bary?

A

Father of plant pathology

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2
Q

What is IDM?

A

Impatiens downy mildew
plasmopara destructor

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3
Q

What is happening to impatiens that is concerning in ontario?

A

They are becoming smaller and less developed

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4
Q

What is the scientific name for a touch me not impatient

A

I. walleriana

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5
Q

What are characteristics of Himalayan balsam impatiens?

A

Susceptible to IDM
invasive species
in canada

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6
Q

What are characteristics of new guinea impatiens

A

Hybrid
sun impatiens
large dark red
do well in rain and wind
tolerant to disease
not the most popular

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7
Q

Why is it named touch me not?

A

when the fruit is ripe it explodes when touched

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8
Q

What are symptoms of IDM?

A

Anything above ground is affected
infect from bottom up
white patches on top of leaves
plant becomes stunted and looks sad
plant collapses

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9
Q

What environment does IDM thrive in?

A

High moisture and wet foliage
cool
dry and warm

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10
Q

IDM pathogen characteristics?

A

Plasmopara destructor
kingdom chromista
water molds
algae rather than fungi
cellulose rather than chitin
biotroph
aggressive
specific to I. walleriana

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11
Q

What pathogen is specialized for I. walleriana?

A

Plasmopara

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12
Q

What pathogen is specialized for I. balsamina?

A

P. velutina

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13
Q

What pathogen is specialized for I. noli-tangere?

A

P. obducens

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14
Q

What is a sporangiophore?

A

Stalk

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15
Q

What is a sporangium?

A

zoospores

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16
Q

What is a zoospore?

A

mobile asexual spore
biflagellate
need water to be mobile

17
Q

What is an Oospore?

A

sexual resting spore
survival structure
are able to overwinter in plant debris
thick walls

18
Q

Life cycle of oospores

A

Germinate
infect
growth
sporangia produced
spores spread
symptoms in 5-14 days
oospores produced and survive for more cycles

19
Q

Can you treat an infected plant?

A

no u can decrease symptoms but they are too hard to fully treat

20
Q

Can you prevent infection in a plant?

A

Yes!

21
Q

What is a prevention chemical?

A

mancozeb

22
Q

Fungicide characteristics?

A

Rotate use so no resistance is developed
systemic and protectant
need proper mode of action

23
Q

What are non chemical preventions?

A

Sanitize
decrease moisture
isolate disease
dont reuse soil
have biosecurity in mind

24
Q

Can preventative and curative measures cause for resistance?

A

Yes unfortunately just like imara XDR and Beacon

ENVS 2040 (6 decks)

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