Take All Patch

Question 1

Take All Patch

Cause:

Answer 1

tel. - Gaeumannomyces graminis var.avenae

ana. - Phialophora spp.

Question 2

Gaeumannomyces graminis var.avenae

Host:

Answer 2

– Agrostis stolonifera
– Agrostis tenius
– Agrostis canina

Question 3

Gaeumannomyces graminis var.avenae:
Kingdom: ?
Phylum: ?

Answer 3

Kingdom: Fungi
Phylum: Ascomycota

Question 4

Take All Patch:

Signs

Answer 4

• Ectotrophic runner hyphae and Simple hyphopodia

- Beaked Perithecia and ascospores on Wheat

Question 5

What are ways to tell Summer Patch and Take All apart?

Answer 5

• Summer Patch has a Lobed hyphopodia and Take All has a Simple Hyphopodia
• What grass is it on….different hosts
• Take all happens earlier, symptoms in may
• Summer Patch symptoms in heat of summer

Question 6

Disease cycle of Gaeumannomyces graminis var.avenae on turfgrass:

Answer 6

Mycelium inserts Simple Hyphopodia into root tissue, begins to suck nutrients out, plant health decreases and eventually dies as hyphae slowly moves to its next host to do it again.

Question 7

Gaeumannomyces graminis var.avenae

Symptoms:

Answer 7

• Dinnerplate sized patches of bentgrass that are yellow and bronzing and thinning as it dies.
• “Frog Eyes”

Question 8

You have a ring of dead turf…How do you know if its summer patch or take all?

Answer 8

Depends on what the host plant was and what is surviving inside the patch.

Question 9

Take All Patch

Predisposing conditions:

Answer 9

• Cool Soil Temps from 40­°F - 60°F
• Excess soil moisture
• High soil pH
• Low Manganese!!
• New or Renovated sites
• Compaction

Question 10

What causes to soil to become suppressive and inhibit Gaeumannomyces from attacking?

Answer 10

Pseudomonas (Soil Bacteria) that build up and begin to work after 3 years on a new site.

Question 11

Gaeumannomyces graminis var. avenae

Fertility Management:

Answer 11

• Add N-P-K in a 3:1:2 ratio
• Add Manganese Sulfate 2-6lb/year
• Maintain 5.5 - 6.2 soil pH.
• use Ammonium N sources
• Avoid Nitrate forms of N

Question 12

What chemical classes work effectively on Take All?

give an example for each…

Answer 12

DMI - ex. Triticonazole
Qoi - ex. Azoxystrobin
MBC - ex. benomyl

Question 13

Take All chemical control….what you use and when?

Answer 13

• Begin treatments when soil stabilizes at 65°F at 2” depth
• use High label rates
• Use at least 2 gallons water/1000
• April and May when soil temps reach 40°F - 60°F
• Treat at 28 day intervals
• Add Primo to the program