PACE Turf

Effect of Iron sulfate and Trimmit on turf quality and poa invasion

wendy_gelernter — Fri, 18 Jan 2013 19:38:44 -0600

by: wendy_gelernter

Description: In this 2 year study, iron sulfate (FeS) and Trimmit (paclobutrazole) were evaluated for their impact on poa control and on turf quality. The best poa control and the highest turf quality resulted from FeS combined with Trimmit at FeS rates of 0.5 and 1.0 lbs. For more information, [url=http://www.paceturf.org/index.php/memberedition/iron_poa_and_moss/]see this report[/url]. Data from N. Ream et. al., Virginia Agricultural Experiment Station.

Control of large white grubs

wendy_gelernter — Sun, 09 Sep 2012 15:55:28 -0500

by: wendy_gelernter

Description: This rating of products that are used for late summer control of large white grubs was the consensus of turf entomologists who met in June, 2012. Though a good performer, Dylox is restricted or not registered in many areas due to environmental and safety concerns.

Ten lined June beetle

wendy_gelernter — Mon, 13 Aug 2012 12:40:14 -0500

by: wendy_gelernter

Description: The adult beetles of the ten lined June beetle, [i]Polyphylla decemlineata[/i], a large (1 inch long) scarab beetle that is related to masked chafers and Japanese beetles, are occasional summer visitors to golf courses, but the larvae (grubs) are not considered pests of turf.

Arthurs Pass National Park, New Zealand

wendy_gelernter — Fri, 16 Sep 2011 16:23:32 -0500

by: wendy_gelernter

Description: A two hour train ride from Christchurch lands you in the middle of New Zealand's glorious Southern Alps.

The kea

wendy_gelernter — Fri, 16 Sep 2011 16:22:21 -0500

by: wendy_gelernter

Description: This alpine parrot is found only in the mountains of the South Island of New Zealand. Even though their native habitat is the beech forest, they are especially intrigued by the rubber strip on automobile windshield wipers, and can be found hopping around parking lots, looking for cars to wreak mischief on.

Temperature forecast for March - May, 2011

wendy_gelernter — Tue, 15 Mar 2011 13:45:38 -0500

by: wendy_gelernter

Description: Hotter than normal temperatures are forecast for much of the southern U.S., and cooler than normal temperatures are forecast for much of the Pacific Northwest and Central Plains states. Data courtesy of the NOAA (National Oceanic and Atmospheric Administration).

Precipitation forecast, March - May, 2011

wendy_gelernter — Tue, 15 Mar 2011 13:43:38 -0500

by: wendy_gelernter

Description: Below normal rainfall is forecast (brown shading) for much of the southern U.S. in the coming months, while normal levels of precipitation are forecast for the rest of the country. Data courtesy of the NOAA (National Oceanic and Atmospheric Administration).

Torrey Pines South Golf Course

wendy_gelernter — Sun, 02 May 2010 22:20:31 -0500

by: wendy_gelernter

Description: One week after foramsulfuron (Revolver) application. Photo submitted by Candice Combs, CGCS.

Estimated soluble calcium for gypsum vs. anhydrite at two time points

wendy_gelernter — Sun, 21 Feb 2010 12:06:05 -0600

by: wendy_gelernter

Description: In follow up testing on the solubility of gypsum vs. calcium sulfate anhydrite soil amendments (see [url=http://www.paceturf.org/index.php/memberedition/video_quick_test_for_gypsum_products/]this video[/url]), we estimated the level of soluble calcium for four different products at 30 minutes after addition to water, and at 18 days after addition to water. Note that at 30 minutes, there was 6 to 7 times more soluble calcium in gypsum products than anhydrite products. At 18 days after addition of water, the anhydrite products had partially solubilized, but still had dramatically less calcium in solution than gypsum products. Letters (a through d) are used to indicate the results of statistical analysis (Fisher's protected LSD, p<0.05). For each time point, values associated with the same letter are not significantly different.

Solubility of gypsum vs. calcium sulfate anhydrite

wendy_gelernter — Sun, 21 Feb 2010 12:02:04 -0600

by: wendy_gelernter

Description: In follow up testing on the solubility of gypsum vs. calcium sulfate anhydrite soil amendments�(see [url=http://www.paceturf.org/index.php/memberedition/video_quick_test_for_gypsum_products/]this video[/url]), we evaluated the solubility of four different products at 30 minutes after addition to water, and at 18 days after addition to water. As measured by the increase in EC, gypsum products were 3 to 4 times more soluble than anhydrite products at 30 minutes after addition to water. After 18 days, the anhydrite products had partially solubilized, but were still significantly less soluble than gypsum products. Letters (a through c)�are used to indicate the results of statistical analysis (Fisher's protected LSD, p<0.05). For each time point, values associated with the same letter are not significantly different.

Dr. Paul Heller, 1948 - 2010

wendy_gelernter — Fri, 22 Jan 2010 15:18:52 -0600

by: wendy_gelernter

Description: Dr. Paul Heller was an esteemed turfgrass entomologist at Pennsylvania State University from 1976 to 2009. He was a beloved mentor to countless students, a valuable technical resource to turf managers and fellow researchers and and highly respected teacher. He will be greatly missed.

Scalping of bentgrass with Proxy

wendy_gelernter — Wed, 28 Oct 2009 12:35:21 -0500

by: wendy_gelernter

Description: Proxy, or ethephon, may cause scalping on bentgrass, as detailed in a 2007 to 2008 study conducted by [url=http://www.plantmanagementnetwork.org/ats/element/sum2.aspx?id=8002]Dernoeden and Pigati[/url]. This data from 2008 indicates that scalping damage shows up 6 weeks or more after application, but that the turf recovers several weeks later. Scalping has not been a consistent problem with Proxy on bentgrass in other locations, however. For more information, see [url=http://www.paceturf.org/index.php/memberedition/proxy_and_bentgrass_scalping/]this PACE Turf review and interpretation[/url] of the research.

Microdochium in July

wendy_gelernter — Thu, 06 Aug 2009 11:19:46 -0500

by: wendy_gelernter

Description: Microdochium patch (pink snow mold) unexpectedly appeared in July, due to [url=http://www.paceturf.org/index.php/memberedition/pest_threat_temperature_table/]threat temperatures[/url] below 62F (17C) a few days earlier.

Spring dead spot prevention timing

wendy_gelernter — Fri, 31 Jul 2009 17:08:06 -0500

by: wendy_gelernter

Description: For SDS prevention on non-overseeded bermudagrass, the first fenarimol (Rubigan) application should be made 6 weeks before average air temperatures drop below 50F (10C). To predict when this will occur, review your Weather History from the past few years for late summer/early fall months. In this 2008 example from Larence Kansas, average air temps stayed pretty well below 50F after October 22. The first Rubigan application should therefore be made around September 10.

Spring dead spot

wendy_gelernter — Sun, 26 Jul 2009 12:43:56 -0500

by: wendy_gelernter

Description: Stolon of GN1 bermudagrass infected with spring dead spot, caused by the fungus [i]Ophiosphaerella[/i]. This fungus is also known as [i]Leptosphaeria[/i]. Note the small, dark brown circles, which are fungal [url=http://www.paceturf.org/photo/showphoto.php?photo=101]infection cushions[/url], and the thin dark strands of the fungal ectotrophic hyphae. See [url=http://www.paceturf.org/photo/showphoto.php/photo/1452]this photo[/url] for a look at the appearance of GN1 roots damaged by this fungus.

Spring dead spot

wendy_gelernter — Sun, 26 Jul 2009 12:41:19 -0500

by: wendy_gelernter

Description: Note the darkened, damaged roots of GN1 bermudagrass that have been infected with spring dead spot, caused by the fungus [i]Ophiosphaerella[/i]. This fungus is also known as [i]Leptosphaeria[/i]. See [url=http://www.paceturf.org/photo/showphoto.php?photo=1453]this photo[/url] for a close-up of the fungal structures involved in the infection.

Surrounds with anthracnose-killed poa

wendy_gelernter — Mon, 20 Jul 2009 14:17:20 -0500

by: wendy_gelernter

Description: Drought stress combined with anthracnose pressure are common problems on surrounds where poa has established.

Surrounds with anthracnose-killed poa

wendy_gelernter — Mon, 20 Jul 2009 14:16:15 -0500

by: wendy_gelernter

Description: Drought stress combined with anthracnose pressure are common problems on surrounds where poa has established.

Nitrogen test strips

wendy_gelernter — Sat, 18 Jul 2009 12:16:39 -0500

by: wendy_gelernter

Description: Nitrogen test strips can be used for a [url=http://www.paceturf.org/index.php/public/quick_test_for_soil_nitrate/]quick test of soil nitrate levels[/url]. However improper storage can give erroneous results. In this photo, the same soil was tested with all 4 strips. However, the top 2 strips were stored in a plastic bag, while the bottom 2 strips were stored in the original container. The top 2 strips gave an erroneous reading due to absorption of moisture in the plastic bag. [url=http://www.paceturf.org/index.php/memberedition/warning_on_use_of_nitrogen_strips/]Read more about proper storage of nitrogen strips.[/url]

Root knot nematode damage

wendy_gelernter — Sat, 18 Jul 2009 12:14:23 -0500

by: wendy_gelernter

Description: Underside of cup cutter sample from bent/poa green. Galls (or knots) that form on the roots interfere with root function, which results in turf damage. Inset shows enlarged photo of roots with galls.

Poa annua seedheads

wendy_gelernter — Thu, 18 Jun 2009 14:07:18 -0500

by: wendy_gelernter

Seedheads on a Poa annua green

wendy_gelernter — Thu, 18 Jun 2009 14:06:53 -0500

by: wendy_gelernter

Description: Note the small patch of perennial biotype Poa that does not produce seedheads

Poa seedhead suppression with Proxy (ethephon)

wendy_gelernter — Thu, 18 Jun 2009 14:05:53 -0500

by: wendy_gelernter

Description: Data from winter, 2000 trial at Del Mar Country Club, Del Mar, CA. Read the full research report, [url=http://www.paceturf.org/index.php/journal/evaluation_of_proxy_as_a_poa_seedhead_inhibitor/]Evaluation of Proxy as a Poa Seedhead Inhibitor[/url]

Poa grows even here!

wendy_gelernter — Sun, 01 Mar 2009 00:38:22 -0600

by: wendy_gelernter

Description: If you had to bet on which weed would be the first to invade a pristine patch of artificial turf, wouldn't most of you guess [i]Poa annua[/i]? The living proof , photographed above, shows that this hardy weed truly can survive anywhere, despite lack of water, nutrients or decent soil.

Irrigation distribution problems

wendy_gelernter — Fri, 23 Jan 2009 11:41:28 -0600

by: wendy_gelernter

PACE Internet Poll Results

wendy_gelernter — Sun, 09 Mar 2008 18:05:12 -0500

by: wendy_gelernter

Description: Thank you for your votes in our recent PACE internet poll. As expected, the large majority (92%)of you use broadband (cable, DSL, etc) to access the internet, and some of you (19%) have even begun to use your cell phones to check the web.

Performance of chafer and Japanese beetle products

wendy_gelernter — Sun, 09 Mar 2008 17:32:58 -0500

by: wendy_gelernter

Description: Dr. David Shetlar (Ohio State University) has summarized 28 years of research data from around the U.S. on the performance of preventive products for chafers and Japanese beetles. The number of research trials that were used in this analysis are indicated inside each bar. The product Acelepryn (chlorantraniliprole), though not shown in this graph, has also demonstrated very good control of white grubs.

Shade

wendy_gelernter — Wed, 06 Feb 2008 19:44:20 -0600

by: wendy_gelernter

Description: Note thinning turf in areas where shade from trees exists