Lab 7

Question 1

Describe apothecia

Answer 1

wide, saucer/cup shape
asci arranged on the exposed surface

Question 2

Scientific name of white mold

Answer 2

Sclerotinia sclerotiorum

Question 3

Does white mold only have anamorph or teleomorph stage

Answer 3

teleomorph

Question 4

What environment does white mold like

Answer 4

dense canopy, long periods of wet weather

Question 5

symptoms of white mold

Answer 5

lesions, wilting

Question 6

Signs of white mold

Answer 6

sclerotia, apothecia, ascospores, white fluffy mycelia

Question 7

management of white mold

Answer 7

crop rotation, reduce soil moisture, reduce canopy density

Question 8

Describe a perithecium

Answer 8

asci produced in a hymenium
ostiole forms

Question 9

scientific name of ergot of rye

Answer 9

Claviceps purpurea

Question 10

what structures does ergot of rye infect

Answer 10

unfertilized, open flowers and their ovaries

Question 11

what type of poisoning does ergot of rye produce

Answer 11

mycotoxin

Question 12

how does ergot of rye overwinter

Answer 12

in soil as sclerotia

Question 13

In ergot of rye what germinates from the sclerotia

Answer 13

perithecia

Question 14

scientific name of teleomorph of Gibberella ear rot

Answer 14

Gibberella zeae

Question 15

2 mycotoxins of GER

Answer 15

DON and zearalenone

Question 16

How do GEB symptoms begin

Answer 16

pinkish coloration at ear tip

Question 17

is GER monocyclic or polycyclic

Answer 17

monocyclic

Question 18

What does GER overwinter as

Answer 18

chlamydospores, ascospores (perithecia)

Question 19

management of Gibberella ear rot

Answer 19

crop rotation, deep soil tillage, post harvest drying, resistant hybrids