SOUR ROT Flashcards
1
Q
Causative organism
A
Rhizopus nigricans
2
Q
When does it happen?
A
During and after ripening
3
Q
Can undamaged berries be infected?
A
No, thus it mean only wounded/open berries will be infected once penetrated
4
Q
What happens inside the berry?
A
Natural yeast change sugar to alcohol
5
Q
Why is there a sour smell?
A
Acetobacter spp. changes the alcohol to vinegar
6
Q
Vinegar flies?
A
Are atracted and lay there eggs in the infected berries.
7
Q
How can wounds where sour rot penetrate be induced
A
- initial botrytis infection
- pecking of birds
- berry burst due to odium
- stinging by fruitflies
- bursting/tearing apart of pedicels during swelling of berries in compact bunches
8
Q
First signs of sour rot
A
yellowish-brown to orange discolouration accompanied by rotting without any slip skin or cracked skin
