Sunflower diseases Flashcards
1
Q
Sclerotinia wilt scientific
A
Sclerotinia sclerotiorum
2
Q
Sclerotinia wilt disease cyce
A
- germination of apothecia
- release of ascospores
- infects head & stems
- mycelia infects roots and stems at soil level
3
Q
Sclerotinia signs and symptoms
A
signs - sclerotia in head, mycelia covering head
symptoms - head collapse, shredding
4
Q
How is sclerotinia wilt spread
A
soil and seed borne
5
Q
sclerotinia wilt conditions
A
wet
6
Q
Sclerotinia control
A
- 3-4 year crop rotation
- avoid a dense canopy
- seed treatment
- control weeds
- fungicides
7
Q
Sunflower rust scientific
A
Puccinia helianthi
8
Q
sunflower rust
A
much like cereal rusts but crop rotation works!!
9
Q
What is downy mildew caused by
A
oomycete
10
Q
how does downy mildew spread
A
seed borne, soil borne
