program 2
DESCRIPTION
Program 2. Program 7. Curative Program 10. Results Penncross. Program 2 Program 7 Curative Program 10. Programs 2,7. Spray 5. Spray 2. Spray 4. Spray 3. Spray 6. Spray1. Difference Between Varieties. Program 7. Clearys 3336. Daconil Ultrex. Prostar. Heritage. Fore. Banner - PowerPoint PPT PresentationTRANSCRIPT
Program 2
Application No. Product Rate/1000 sq ft
1 Daconil Ultrex 3.8 oz
2 Chipco 26 GT 3 oz
3Daconil Ultrex
Chipco Signature3.8 oz4.0 oz
4Daconil Ultrex
Chipco Signature3.8 oz4.0 oz
5 Fore 8.0 oz
6 Daconil Ultrex 3.8 oz
Program 7
Application No. Product Rate/1000 sq ft
1 Banner Maxx 1.0 oz
2 Daconil Ultrex 3.8 oz
3 Fore 8.0 oz
4 Clearys 3336 2.0 oz
5 Heritage 0.2 oz
6 Prostar 1.5 oz
Curative Program 10
1 Daconil Ultrex 7.35 oz
2 Heritage 0.4 oz
3Daconil Ultrex +
Heritage3.8 oz4.0 oz
4Daconil Ultrex +Chipco Signature
3.8 oz4.0 oz
ResultsPenncross
• Program 2
• Program 7
• Curative Program 10
Programs 2,7
Penncross
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
Check
Program 2
Program 7
Spray1
Spray 2Spray 3
Spray 4 Spray 5
Spray 6
Difference Between Varieties Check
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
pg1 A1
pg1 Cren
pg1 L-93
pg1 Penn
Varieties 2000 Check
01020304050607080
weeks
Per
cent
Bp A1
Crenshaw
L-93
Penncross
Program 7Penncross
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Pe
rce
nt
Bro
wn
Pa
tch
Check
Program 7
BannerMaxx
DaconilUltrex
Fore
Clearys 3336
Heritage
Prostar
Fungal Isolations
• Rhizoctonia solani
• Rhizoctonia zeae
Objectives• Determine which Rhizoctonia species are
present
• Determine when they occur
• Determine if some fungicides are more effective than others for control of the different species
Materials and Methods
• Samples of Brown Patch taken twice monthly
• Diseased leaves surface sterilized and plated out on water agar
• Mycelia transferred to Potato Dextrose Agar
• Fungi identified after cultures have matured
Typical AG 2,2 IIIB (“mat rush”) culture appearance ~ 3 wk, PDA
Rhizoctonia zeae
Isolates Results
R. solani R. zeaeJ une 60 41J uly 4 26August 0 0
J une 6 2J uly 19 0August 10 14
1999
2000
Results
1999
June July August Sept.R. solani 61 5 0 0R . zeae 32 25 0 0
Results
2000
June July August Sept.R. solani 6 19 10 29R . zeae 2 0 13 5
Clearys 3336 Not Effective on Rhizoctonia zeae
Programs 6,7
Penncross
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Perc
en
t B
row
n P
atc
h
Check
Program 6
Program 7
Clearys 3336
Clearys 3336Daconil Ultrex
Heritage
Progams 6 and 7 2000
0
10
20
30
40
50
60
70
80
1 2 3 4 5 6 7 8 9 10 11 12 13
Weeks
Per
cen
t Bro
wn
Pat
ch
1
6
7Clearys 3336
Clearys 3336
RhizoctoniaReported from Turfgrasses
Rhizoctonia solani AG 1 1 A - “sasakii” type - primary pathogen of tall fescue 1 B - “web blight” - sometimes from Poa AG 2,2 IIIB - “mat rush” type - cool season grasses “Turf “ - warm season grasses AG 4 - “praticola” - damping-off; unspecialized AG 5 - rare in tall fescueRhizoctonia zeaeRhizoctonia oryzaeRhizoctonia cerealis CAG 1 or AG-D -yellow patch in the US AG Q - yellow patch in JapanWeakly virulent or avirulent Binucleate species
Rhizoctonia Blight (Brown Patch) of Cool-season Turfgrasses
Agrostis, Poa, Festuca, Lolium spp. all affected Favored by warm, humid summertime conditions “Smoke Ring” symptom characteristic on low mowing heights ( especially
Agrostis) Leaf lesions initially result from mycelium from sclerotia or colonized host
tissue; lesions may consume entire leaves Rhizoctonia solani AG 1, 1A “sasakii” type and Rhizoctonia solani AG 2,2 IIIB
“mat rush” type are the most prevalent pathogens
Area Under Disease Progress CurvesCheck
0102030405060708090
5/28
/199
8
6/4/
1998
6/11
/199
8
6/18
/199
8
6/25
/199
8
7/2/
1998
7/9/
1998
7/16
/199
8
7/23
/199
8
7/30
/199
8
8/6/
1998
8/13
/199
8
8/20
/199
8
Rating Date
Pe
rce
nt
Dis
ea
se
Check
AUDPC = 4025.9
Percent Brown Patch 1998 AssociatedWith Fungicide Programs - Program 5
0102030405060708090
5/28
/199
8
6/4/
1998
6/11
/199
8
6/18
/199
8
6/25
/199
8
7/2/
1998
7/9/
1998
7/16
/199
8
7/23
/199
8
7/30
/199
8
8/6/
1998
8/13
/199
8
8/20
/199
8
Rating Date
Pe
rce
nt
Dis
ea
se
Program 5
Banner +Daconil Ult.
Dac UltHeritage
Al Sig +Fore
Dac + Al Sig. Banner +
Dac Ult
AUDPC =843.5 cd
Percent Brown Patch 1998 AssociatedWith Fungicide Programs - Program 6
0102030405060708090
5/28
/199
8
6/4/
1998
6/11
/199
8
6/18
/199
8
6/25
/199
8
7/2/
1998
7/9/
1998
7/16
/199
8
7/23
/199
8
7/30
/199
8
8/6/
1998
8/13
/199
8
8/20
/199
8
Rating Date
Pe
rce
nt
Dis
ea
se
Program 6
DacUlt +Al Sig Prostar
HeritageAl Sig +Fore
Heritage +Prostar Al Sig +
Fore
AUDPC = 673.8 d
Percent Brown Patch 1998 AssociatedWith Fungicide Programs - Program 7
0102030405060708090
5/28
/199
8
6/4/
1998
6/11
/199
8
6/18
/199
8
6/25
/199
8
7/2/
1998
7/9/
1998
7/16
/199
8
7/23
/199
8
7/30
/199
8
8/6/
1998
8/13
/199
8
8/20
/199
8
Rating Date
Pe
rce
nt
Dis
ea
se
Program 7
Sentinel +Daconil Ult. Consyst Heritage Daconil Ultrex+
Aliette Sig
Daconil Ultrex Daconil Ult +
Banner
AUDPC = 722.8 d
Percent Brown Patch 1998 AssociatedWith Fungicide Programs - Program 1
0102030405060708090
5/28
/199
8
6/4/
1998
6/11
/199
8
6/18
/199
8
6/25
/199
8
7/2/
1998
7/9/
1998
7/16
/199
8
7/23
/199
8
7/30
/199
8
8/6/
1998
8/13
/199
8
8/20
/199
8
Rating Date
Pe
rce
nt
Dis
ea
se
Program 1
AUDPC =1374.6 b
Banner Maxx Dac Ult Fore Clearys 3336
HeritageProstar
Percent Brown Patch 1998 AssociatedWith Fungicide Programs - Program 2
0102030405060708090
5/28
/199
8
6/4/
1998
6/11
/199
8
6/18
/199
8
6/25
/199
8
7/2/
1998
7/9/
1998
7/16
/199
8
7/23
/199
8
7/30
/199
8
8/6/
1998
8/13
/199
8
8/20
/199
8
Rating Date
Pe
rce
nt
Dis
ea
se
Program 2
AUDPC =1103.4 bcd
Dac Ult Chipco 26019 ConsystHeritage
ProstarProstar
Area Under Disease Progress CurvesCheck
0
1020
30
40
5060
70
80
6/2/
1999
6/9/
1999
6/16
/199
9
6/23
/199
9
6/30
/199
9
7/7/
1999
7/14
/199
9
7/21
/199
9
7/28
/199
9
8/4/
1999
8/11
/199
9
8/18
/199
9
8/25
/199
9
9/1/
1999
Rating Date
Pe
rce
nt
Dis
ea
se
Check
AUDPC = 4221
Area Under Disease Progress Curves
0
1020
30
40
5060
70
80
6/2/
1999
6/9/
1999
6/16
/199
9
6/23
/199
9
6/30
/199
9
7/7/
1999
7/14
/199
9
7/21
/199
9
7/28
/199
9
8/4/
1999
8/11
/199
9
8/18
/199
9
8/25
/199
9
9/1/
1999
Rating Date
Pe
rce
nt
Dis
ea
se
Program 2
AUDPC =1011.5
Martin, 1999
Crenshaw BentDollar Spot Fungicide Trial
Area Under Disease Progress Curves
0
1020
30
40
5060
70
80
6/2/
1999
6/9/
1999
6/16
/199
9
6/23
/199
9
6/30
/199
9
7/7/
1999
7/14
/199
9
7/21
/199
9
7/28
/199
9
8/4/
1999
8/11
/199
9
8/18
/199
9
8/25
/199
9
9/1/
1999
Rating Date
Pe
rce
nt
Dis
ea
se
Program 3
AUDPC =1195.3
Area Under Disease Progress Curves - Percent Brown Patch
01020304050607080
6/2/
1999
6/9/
1999
6/16
/199
9
6/23
/199
9
6/30
/199
9
7/7/
1999
7/14
/199
9
7/21
/199
9
7/28
/199
9
8/4/
1999
8/11
/199
9
8/18
/199
9
8/25
/199
9
9/1/
1999
Rating Date
Pe
rce
nt
Dis
ea
se
Program 5
AUDPC =855.8
Banner +DacUlt- 1 +3.8 oz
Consyst -4 oz
Heritage-0.2 oz DacUlt+
Al Sig -3.8+4 oz
DacUlt -3.8 oz Banner +
DacUlt - 1 +3.8 oz
Area Under Disease Progress Curves - Percent Brown Patch
01020304050607080
6/2/
1999
6/9/
1999
6/16
/199
9
6/23
/199
9
6/30
/199
9
7/7/
1999
7/14
/199
9
7/21
/199
9
7/28
/199
9
8/4/
1999
8/11
/199
9
8/18
/199
9
8/25
/199
9
9/1/
1999
Rating Date
Pe
rce
nt
Dis
ea
se
Program 8
AUDPC =822.5
Eagle +DacUlt - 0.4+3.1 oz
Fore +Eagle -6 + 0.34 oz
Heritage -0.2 oz
Fore +Aliette -8 + 4 oz
DacUlt -3.8 oz Eagle + DacUlt-
0.4 + 3.1 oz
Dollar Spot LesionsBermudagrass Leaves
Program 3
Application No. Product Rate/1000 sq ft
1 Chipco 26GT 3.0 oz
2 Daconil Ultrex 3.8 oz
3 Heritage 0.2 oz
4Daconil Ultrex +Chipco Signature
3.8 oz4.0 oz
5 Daconil Ultrex 3.8 oz
6 Chipco 26GT 3.0 oz
ResultsA 1
• Program 2
• Program 3
• Program 7
• Curative Program 10
Programs 2,3,7A-1
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Perc
en
t B
row
n P
atc
h
Check
Program 2
Program 3
Program 7
Spray 1
Spray 2Spray 3
Spray 4
Spray 5
Spray 6
Program 2A1
0
10
20
30
40
50
60
70
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
Check
Program 2
DaconilUltrex
Chipco 26GT
Daconil Ultrex +Chipco Sig.
Fore
Daconil Ultrex
Daconil Ultrex +Chipco Sig.
Program 3A 1
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
Check
Program 3Chipco 26GT
DaconilUltrex
Heritage
Daconil Ultrex +Chipco Sig.
Chipco 26GT
DaconilUltrex
Program 7A 1
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
Check
Program 7
Banner Maxx
DaconilUltex
Fore
Clearys 3336
Heritage
Prostar
Program 10A 1
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
Check
Program 10
DaconilUltrex Heritage
Heritage +Daconil Ultrex
Chipco Sig. +Daconil Ultrex
Program 3Penncross
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Pe
rce
nt
Bro
wn
Pa
tch
Check
Program 3
Chipco 26GT
DaconilUltrex
Heritage
Daconil Ultrex +Chipco Sig.
DaconilUltrex
Chipco 26GT
Difference Between Varieties Program 3
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch pg3 A1
pg3 Cren
pg3 L-93
pg3 Penn
Difference Between Varieties Program 7
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch pg7 A1
pg7 Cren
pg7 L-93
pg7 Penn
Difference Between VarietiesProgram 10
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Per
cen
t B
row
n P
atch
pg10
pg10 Cren
pg10 L-93
pg10 Penn
Difference Between Varieties
Program 2
0
10
20
30
40
50
60
70
80
0 7 14 21 28 35 42 49 56 63 70 77 84 91
Days
Perc
en
t B
row
n P
atc
h
pg2 A1
pg2 Cren
pg2 L-93
pg2 Penn
R. solani
Conclusions
• Preventative programs more effective than curative programs
• Fungicide selection and timing critical
• Rhizoctonia zeae most likely to occur during hottest times of the summer
• Varieties of bentgrass do differ