Cereal Rusts Flashcards
1
Q
What are cereal rusts
A
basidiomycetes
2
Q
Stem rust scientific
A
Puccinia graminis
3
Q
Stem rust hosts
A
wheat, barley, oats, rye
4
Q
5 spore stages of stem rust
A
- Basiodiospores - form on wheat but need alternate host plant to continue
- Pycniospores
- Aeciospores - attack wheat once
- Urediospores - produces by aeciospores & have several life cycles
- Teliospores - end of season
5
Q
Stem rust: Obligate parasite?
A
yes
6
Q
How many hosts do some rust pathogens need to complete their life cycle?
A
two - barberry plant & wheat (stem rust)
- Meadow rue & wheat (leaf rust)
7
Q
What type of rust spore is wind blown?
A
Urediospores
8
Q
Control of stem rust
A
- resistant varieties
- control of barberry plant
- NOT crop rotation
- early seeding
- fungicides
9
Q
Leaf rust scientific
A
Puccinia triticina
10
Q
Alternate host for leaf rust
A
Meadow rue
11
Q
Leaf rust life cycle
A
same as stem rust except different alternate host
12
Q
Symptoms of leaf rust
A
circular pustules on upper side of leaves
13
Q
Stripe rust scientific
A
Puccinia stiiformis
14
Q
Stripe rust control
A
- early seeding
- resistant varieties - not known
- fungicides
