Gray Snow Mold Flashcards
1
Q
Gray Snow Mold
**Cause: **
A
– Typhula incarnata
– Typhula ishikariensis
2
Q
Gray Snow Mold
Host:
A
– Agrostis spp.
– Festuca spp.
– Lolium spp.
– Poa spp.
3
Q
Gray Snow Mold
Symptoms:
A
- Large patches of silver/gray, matted down turf grass that coalesce
4
Q
Gray Snow Mold
Disease Cycle:
A
Sclerotia survive in thatch….when conditions are favorable, they germinate into mycelium and form basidia and basidiospores. The basidiospores spread rapidly and form more sclerotia.
5
Q
Gray Snow Mold
Signs:
A
- White to gray Mycelium is often present
- Has clamps on mycelium
- Red, spherical sclerotia are on blighted leaves.
6
Q
Gray Snow Mold
Predisposing Conditions / epidemiology:
A
- Cold 35°-Warm 50°F Optimum temperature= 35°F
- Extended leaf wetness
- Thatch buildup
- Historical trouble spots
- Excess levels of N going into dormancy
- **SNOW **
7
Q
Gray Snow Mold
Management Tactics:
A
- Keep snow off
- Keep turf dry
- Maintain a balanced fertility program
– soil test and adjust levels of nutrients as necessary - Maintain adequate N inputs in season
– 3 to- 5 lb. per 1000
– avoid excess N going into dormancy
8
Q
Gray Snow Mold:
Chemical Control:
A
- Best Chemical option is quintozene (PCNB)
9
Q
Gray Snow Mold
Cause:
A
- Typhula incarnata
- Typhula ishikariensis
