Shetlar Turfgrass Entomology “Effort(s)” David J. Shetlar (the BugDoc) Associate Professor of Entomology The Ohio State University Columbus, OH.

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Presentation transcript:

Shetlar Turfgrass Entomology “Effort(s)” David J. Shetlar (the BugDoc) Associate Professor of Entomology The Ohio State University Columbus, OH

Ranked Efficacy of White Grub Insecticides 1976 – 2005 a – rateaverange% of tests Insecticidelb.ai./a.% control# tests% controlbelow 70% Carbaryl (=Sevin) Chlorpyrifos (=Dursban) Permethrin Trichlorfon (=Dylox, Proxol) a Data from ESA publications ( ) & Ohio testing using masked chafer and Japanese beetle data where label timing recommendations were used and at least 4.0 grubs per sq.ft. were found in checks. (D. Shetlar) Clothianidin (=Arena) Halofenozide (=MACH2) Imidacloprid (=Merit)

Comparison of Grub Insecticide Efficacy by Time of Application Halofenozide (8)94.4 (23)88.8 (21)89.6 (19) 77.7 (27) (=MACH2) (4)63.7 (9)93.8 (12)75.0 (5) --- Imidachloprid (12)91.3 (27)94.7 (39)93.6 (29) 94.1 (35) (=Merit) (1)88.0 (1)89.0 (1)82.0 (1) --- Clothianidin (1)90.0 (1)97.0 (2) (=Arena) (1)100.0 (2)99.0 (2) (1) Trichlorfon (5) 77.7 (19) rate ave % control (#tests) Insecticidelb.ai./a.MayJuneJulyto Aug 16to Sept 10 a Data from ESA publications ( ) & Ohio testing using masked chafer and Japanese beetle data where label timing recommendations were used and at least 4.0 grubs per sq.ft. were found in checks. D. Shetlar