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. Solutions for Insect and Weed Management
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)
Durentis™ 4 fl. oz./A
Larvae
White Grubs
Durentis™ 2.7 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
Follow all label directions and local recommendations
Annual Bluegrass Seedheads Recent research has shown fall is the time to start controlling next spring’s annual bluegrass seedheads since seedhead formation is initiated in fall under shorter days and cooler temperatures. Applications of Proxy ® in late fall plus spring improve control and consistency of control over the traditional spring-only applications.
Application
Timings
Product and use rate per 1,000 st. ft.
Proxy ® 5 fl. oz. + Stressgard ® -containing fungicide
With the snow mold fungicide application or after growth slows
Late fall application
Always more effective to be early than late on spring applications. Initial application can be scheduled by: • Boot stage of annual bluegrass seedhead • Forsythia bloom • 150-200 Growing Degree Days base 32 (GDD32) starting January 1st • 50 GDD50 starting February 1st
Proxy 5 fl. oz. + Stressgard-containing fungicide
First spring application
Proxy 5 fl. oz. + (Primo Maxx ® 0.125 fl. oz. or Anuew ® 2 fl. oz./A or Anuew EZ 4.4 fl. oz./A and/or Stressgard-containing fungicide) Proxy 2.5 fl. oz. + (Primo Maxx 0.063 fl. oz. or Anuew 1 fl. oz./A or Anuew EZ 2.2 fl. oz./A) Proxy 5 fl. oz. + (Primo Maxx 0.125 fl. oz. or Anuew 2 fl. oz./A or Anuew EZ 4.4 fl. oz./A)
Second spring application
3-4 weeks after initial spring application
2-week intervals
Additional applications until seedhead production ceases
4-week intervals
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June 2025
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