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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

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