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Ipm diseases > Corn > Flashcards

Corn Flashcards

1
Q

Physoderma maydis

A

Brown spot

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2
Q

Small chlorotic spots on leaf blades
Arranged in alternating pattern

A

Physoderma maydis

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3
Q

Buggy whip

A

Abiotic

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4
Q

Slight or compldte fusion of the upper part of thr plant into tube

A

Buggy whip

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5
Q

May be caused by volatile herbicides
Such as 2,4-D

A

Buggy whip

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6
Q

Puccinia sorghi

A

Common rust

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7
Q

Pustules are large circular to elongated with brown color

A

Puccinia sorghi

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8
Q

Helicotylentus

A

Corn stunt

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9
Q

Stunting
Commonly observed in heavier soils than sandy loam

A

Corn stunt

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10
Q

Culvularia lunata

A

Culvularia leaf spot

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11
Q

Small necrotic spots with halo

Severe symptom yellowing of whole leaves

A

Culvularia lunata

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12
Q

Diplodia rot

A

Sternocarpella macrospora

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13
Q

On stalk-elongated lesions with cream brown center
On leaves-diamond shaped lesions
On ear- bleached husks

A

Sternocarpella macrospora

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14
Q

Peronosclopora philippinensis

A

Downy mildew

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15
Q

Chlorotic stripes or overall yellowing,
Tassels maybe malformed

A

Peronosclerospora philippinensis

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16
Q

Cercospora zea-maydis

A

Gray leaf spot

17
Q

Elongated necrotic spots may grow parallel to the veins

A

cercospora zea-maydis

18
Q

Mosaic

A

Sugarcane mosaic virus

19
Q

Northern corn leaf blight

A

Exerohilum tursicum

20
Q

Long graygreen elliptical or cigar shaped lesionz

A

Exerohilum tursicum

21
Q

Phaeosphaeria leaf spot

A

Phaeosphaeria maydis

22
Q

Initial symptom pale green spots
Mature symptom- dried or bleached lesions

A

Phaeosphaeria maydis

23
Q

Ustilago maydis

A

Corn smut

24
Q

Smut first appear whren tassels and ears are formed

A

Ustilago maydis

Ipm diseases (7 decks)

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