Plant Pathology Dept. UCR

As part of the University of California Turf Disease Diagnostic Lab services, a weekly report is being sent out to update clients of current disease outbreaks in California and nearby locations with a focus on diseases of golf course turf.  The update will be sent out on a weekly basis.  This update is still a working version, if you have comments about how it can be changed or improved, please e-mail me your suggestions.   If you receive duplicate messages, please let me know. 

- More information on the UC Turf Disease Diagnostic Lab and Turf Program can be found at http://ucrturf.ucr.edu/ and www.turfpathology.ucr.edu

- More information on many of the specific diseases can be found at http://www.ipm.ucdavis.edu/PMG/selectnewpest.turfgrass.html

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Outlook and Summary: August 25, 2008

Problems of annual bluegrass continue to be a problem – from Waitea Patch to heat and drought stress. Only a month left until the end of the summer – a return to a less stressful time is almost in sight!

“The Man” Has Been Busting My Chops Over Permits

The USDA and CDFA have become very stringent with samples and rejected a few boxes in the last few weeks without supporting sample info. This had lead to delayed diagnoses and affected our ability to get back to you ASAP with a disease solution. Please fill out the lab diagnostic forms and include a copy of the federal and state permits to make sure they don’t intercept and throw your stuff away.

A copy of our USDA and CDFA permits can be found here:

http://www.turfpathology.ucr.edu/Downloads/permits/USDApermit76444.pdf

http://www.turfpathology.ucr.edu/Downloads/permits/CDFApermit2443.pdf

Just download, print and put a copy of each inside your box when you send the samples.

OLD NEWS

Anthracnose Best management Practices

The latest issue of GCSAA’s Golf Course Management’s Research Section is dedicated exclusively to pests of annual bluegrass. These include annual bluegrass weevil (ABW) and anthracnose. Check them out!

The anthracnose article covers a lot of ground, and the ABW article features a pest that is not in California (yet) but may be a future threat.

Read it online here: http://gcsaa.org/GCM/Default.aspx

Help Us Help You – Fill Out Those Sample Information Sheets

Please make sure to download and fill out the sample information forms when sending in diagnostic samples. Tracking down distributors and superintendents takes time away from diagnosing other samples in the lab, and most of all, we want to get the right diagnosis to the right person, right away. Thanks!

Location

Highs (ºF)

Lows (ºF)

Soil Temps (6-inch)

Outlook

Possible Major Diseases 

(CIMIS location )

Min

Max

Min

Max

(ºF)

M

T

W

R

F

Sa

Su

(Weather Based)

25

26

27

28

29

30

31

 

Fresno (80)

96

104

68

74

78

S

S

S

S

MS

S

S

Anthracnose, Pythium Blight, Rhizoctonia Sheath and Leaf Spot, Summer Patch

Irvine (174)

77

83

63

66

77

MS

PC

MS

PC

PC

PC

PC

Dollar Spot, Gray Leaf Spot, Rhizoctonia Blight on Cool Season Turfgrass,Southern Blight, Waitea Patch, Summer Patch

Los Angeles (133)

79

85

64

67

72

S

S

S

S

S

S

S

Dollar Spot, Gray Leaf Spot,  Rhizoctonia Blight on Cool Season Turfgrass, Southern Blight, Waitea Patch, Summer Patch

Monterey (19)

65

75

54

57

68

MS

PC

S

PC

PC

PC

S

Dollar Spot, Yellow Patch, Rhizoctonia Blight on Warm Season Turfgrass, Waitea Patch, Summer Patch

Palm Springs (118)

102

107

77

83

87

PC

MS

PC

PC

PC

T-S

T-S

Anthracnose, Pythium Blight, Rhizoctonia Sheath and Leaf Spot, Summer Patch

Riverside (44)

93

99

62

67

76

PC

S

S

T-S

MS

MS

S

Anthracnose,Rhizoctonia Blight on Cool Season Turfgrass, Rhizoctonia Sheath and Leaf Spot, Southern Bight, Summer Patch

Sacramento (131)

89

103

57

65

74

S

S

S

S

S

S

S

Anthracnose, Dollar Spot, Rhizoctonia Blight on Cool Season Turfgrass, Rhizoctonia Sheath and Leaf Spot, Southern Blight, Summer Patch

San Diego (173)

73

76

68

69

na

PC

PC

PC

PC

PC

PC

PC

Dollar Spot, Gray Leaf Spot, Pythium Blight, Rhizoctonia Blight on Cool Season Turfgrass, Rhizoctonia Blight on Warm Season Turfgrass,  Southern Blight, Waitea Patch, Yellow Patch

San Francisco (na)

64

79

57

65

na

MS

S

S

PC

PC

PC

PC

Dollar Spot, Rhizoctonia Blight on Cool Season Turfgrass, Rhizoctonia Blight on Warm Season Turfgrass, Southern Blight, Yellow Patch, Waitea Patch, Take All, Pink Snow Mold

San Jose (132)

79

93

57

65

na

S

S

S

S

MS

S

S

Anthracnose, Dollar Spot, Gray Leaf Spot, Rhizoctonia Blight on Cool Season Turfgrass, Southern Blight,Waitea Patch, Summer Patch

San Luis Obispo (52)

77

85

55

59

70

S

PC

PC

S

MS

S

S

Dollar Spot, Gray Leaf Spot, Rhizoctonia Blight on Cool Season Turfgrass,Southern Blight, Waitea Patch, Summer Patch

Santa Barbara (107)

72

75

62

65

76

MS

PC

MS

PC

PC

PC

PC

Dollar Spot, Gray Leaf Spot, Rhizoctonia Blight on Cool Season Turfgrass,Southern Blight, Waitea Patch, Summer Patch

Key to weather: S = sunny, MS= mostly sunny, PC = partially cloudy, C = cloudy, W = windy, SH = showers, R = rain, / = mixed weather

Sample

Date Received

Location by County

Host

Disease

Abiotic Problems

215

8/12/2008

Riverside

Sea Shore Paspalum

Algae, Bipolaris, Curvularia

 

216

8/12/2008

Los Angeles

Annual bluegrass,

Perennial Ryegrass

Rhizoctonia Blight, Bipolaris, Curvularia

Chemical Burn - Excess N

217-219

8/12/2008

Salt Lake (UT)

Perennial Ryegrass

Rhizoctonia Blight

 

220-223

8/12/2008

Los Angeles

Annual bluegrass

Algae

Drought/heat/or mechanical

224-225

8/14/2008

Orange

Annual bluegrass

Anthracnose

Black Layer, high salts

226

8/14/2008

Shasta

Annual bluegrass,

Perennial Ryegrass

Southern Blight, Anthracnose, Leptosphaerulina

 

227

8/15/2008

Los Angeles

Annual bluegrass

Fusarium Blight

 

228

8/12/2008

San Diego

Annual bluegrass,

Creeping bentgrass

Curvularia

Heat/drought stress

229-230

8/15/2008

San Diego

Annual bluegrass

Fairy Ring

 

231-232

8/19/2008

Washington (OR)

Perennial Ryegrass,

Annual bluegrass

Summer Patch, Myrothecium

 

233-234

8/19/2008

Los Angeles

Creeping bentgrass,

Annual bluegrass

Waitea Patch

 

235-238

8/19/2008

Los Angeles

Annual bluegrass

Waitea Patch

 

239-241

8/19/2008

Santa Clara

Annual bluegrass

 

High salts, High nitrogen

242-243

8/20/2008

Los Angeles

Annual bluegrass

 

High salts

244-245

8/20/2008

Los Angeles

Creeping bentgrass,

Annual bluegrass

 

Heat/drought stress

246

8/20/2008

Los Angeles

Annual bluegrass

 

Heat/drought stress