Leaf Diseases in Cereals

Question 1

What causes leaf spot

Answer 1

fungi

Question 2

how does leaf spot spread

Answer 2

stubble borne

Question 3

Damage caused by leaf spot

Answer 3

1. yield loss
2. seed shrivelling
3. seed discoloration
4. reduced quality

Question 4

What kind of pathogen causes leaf spot

Answer 4

faculative parasites

Question 5

4 leaf spot diseases

Answer 5

1. tan spot
2. septoria leaf blotch (STB)
3. spot blotch
4. Stagonopora nodorum blotch (SNB)

Question 6

Tan spot symptoms

Answer 6

• oval or diamond shaped lesions with a tan senter on leaves

- red smudge on kernels

Question 7

Septoria tritici blotch symptoms

Answer 7

elongated grey-brown lesions with black pycnidia

Question 8

Spot blotch symptoms

Answer 8

• small dark spots on resistant varieties

- large chlorotic blotched with dark centers on susceptible varieties

Question 9

SNB symptoms

Answer 9

large irregular shaped, tan colored lesions

Question 10

Control of leaf spot

Answer 10

1. tillage
2. rotation
3. resistance
4. fungicides