Mid-Central Zone
Annual Bluegrass Weevils Annual bluegrass weevil is spreading south and west from the northeast US. These programs provide extended control of annual bluegrass weevils plus provides season-long control of white grubs and caterpillars. Phenological indicators provide only a guide in determining if an application is warranted at a given time and do not replace onsite scouting. For best results immediately water in applications targeting larvae with a 0.125” of irrigation. Solutions for Insects
Product and Use Rate per acre
Application
Good
Better
Best
Ideal for fairways
Ideal for fairways or greens
Ideal for greens
1 st application: April* Peak adult densities Forsythia ½ gold & ½ green 125 to 200 GDD 50 ** 2 nd application: Mid-May Larvae begin entering the soil Rhododendron full bloom 300 to 400 GDD 50 3 rd application: Late May Late larvae clean up 2-3 weeks later Up to 600 GDD 50
Triple Crown ® 35 fl. oz. or Suprado 128 fl. oz.
Talstar ® 20 fl. oz. or Suprado ® 128 fl. oz.
Tetrino ® 32 fl. oz.
Tetrino 32 fl. oz.
Tetrino 32 fl. oz.
Dylox ® 420SL 300 fl. oz.
4 th application: July 2 nd generation larvae
Tetrino 32 fl. oz.
Tetrino 32 fl. oz.
Tetrino 32 fl. oz.
White Grubs, Billbugs, and Caterpillars Envu’s latest insecticide, Durentis ® , offers quick knockdown and long-term residual control of common golf course insect pests including white grubs and caterpillars. The active ingredient, chlorantraniliprole, has a small environmental footprint, with limited applicator and pollinator restrictions.
Target
Timing
Target Life Stage
Product
When adult beetles are seen (usually May 1 st - June 15 th ) A second application may be needed if additional generations occur in your area
Tetrino ® 32 fl. oz./A, Triple Crown ® 25-35 fl. oz./A, or Merit ® 0.4 lbs. ai./A (multiple formulations available including on fertilizer)
Billbugs
Larvae
Early season spring application (April - May)
Larvae
Durentis ® 2.7 - 4.0 fl. oz./A
White Grubs
Durentis 2.7 fl. oz./A or Tetrino 32 fl. oz/A or Merit 0.4 lbs. ai./A (multiple formulations available including on fertilizer)
Apply during peak adult activity (usually June - July)
Larvae
1.3 fl. oz./A for 60-day control 2.7 fl. oz./A for 90-day control 4 fl. oz./A for 120-day control Near the end of the season when no more generations expected
Durentis
When adults are first seen
Caterpillars
Larvae
Talstar ® 20 fl. oz./A or Triple Crown 25 fl. oz./A
Merit and Triple Crown contain imidicloprid that may not be available in some juristrictions.
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