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Evaluation of Insecticides for Control of Black Turfgrass Ataenius Grubs

Summary: In a replicated field trial at Los Coyotes Country Club, Buena Park, CA, the insecticides halofenozide, imidacloprid and acephate were tested for control of black turfgrass ataenius grubs. Treatments performing better than the non-treated control included the high rate of Mach 2 G (69.6 oz/1000 square feet), the mid-rate of Mach 2 SC (2.2 oz/1000 square feet) and Merit 75 WSP (0.15 oz/1000 square feet). The highly clumped nature of ataenius infestations, and the relatively low population levels made separation of other treatment effects impossible. However, trends (non-significant) indicate that Pinpoint 15 G (acephate) and the 3.0 oz rate of Mach 2 SC also performed quite well.

A strong rate response for Mach 2 G was observed. Surprisingly, there was only a weak rate response for Mach 2 SC. All products showed some level of curative activity on grub populations that were present at the time of application. In addition, residual activity of up to two months was observed for Mach 2 SC (2.2 oz rate) and Mach 2 G (69.6 oz rate).

Full print version of report (124Kb)

Investigators: Wendy Gelernter, Ph.D. and Larry J. Stowell, Ph.D., CPPP, CPAg

Cooperators:Bill Gallegos, CGCS; Los Coyotes Country Club, Buena Park, CA

Sponsors:Darrin Allred, American Cyanamid; Bernard Olsen, Plant Sciences, Inc

Super Journal Mission

Super Journal Mission: The Super Journal is an on–line turfgrass research publication provided as a public service by PACE Turf. It's mission is to share practical research conducted by turfgrass managers at their sites, turfgrass researchers and students. All published materials are reviewed by Larry Stowell, Ph.D. and Wendy Gelernter, Ph.D. prior to publication.

Please refer to the Super Journal submission guidelines if you wish to have your report published in Super Journal, and our research guide for information on designing and implementing your own turf research project. Please contact us with any further questions or feedback. We look forward to your participation!

Evaluation of Manure Ash Fertilizer Formulations to Provide Nitrogen

Summary: Three manure ash products were formulated for use at golf courses to supply potassium and nitrogen. Product 1 (P1) is a potassium (K) source primarily using ash. Product 2 (P2) is a K and nitrogen (N) source using ash and urea. Product 4 (P4) is a potassium and nitrogen source using ash and blood meal. Eco Soil Systems 0-2-34 was used as a commercial product comparison.

Each product was applied to a golf course approach area to determine efficacy in delivering potassium and nitrogen to the turfgrass. Turfgrass tissues collected from P2 treated areas reported significantly higher K and N levels than the other treatments. All three products increased tissue potassium levels compared to the non-treated check plots two weeks after treatment (WAT). None of the products provided significant increases in tissue K or N at the 4 or 6 WAT evaluations. In addition, none of the products significantly increased soil K levels. Product 2 performed significantly better than the commercial standard (Eco Soil Systems 0-2-34) based upon 2 WAT tissue evaluations. Products 1 and 4 were equivalent to the commercial standard for K and N tissue levels but both products exceeded the commercial standard in clipping weight at 2 WAT. Based upon these results and the discussion below, all three products are suitable for use as potassium sources and the nitrogen containing products 2 and 4 improved turfgrass color.

Printable version of full report

Principal Investigator: Larry Stowell

Cooperators: Eric Lover and Tony Miller, Dove Canyon Country Club

Sponsor: New Charleston Power, El Centro, CA

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