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 ® 2.7 - 4.0 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
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.
Good
Better
Best
Application
Ideal for fairways
Ideal for fairways or greens
Ideal for greens
Late fall application With the snow mold fungicide application or after growth slows
Proxy ® 5 fl. oz./1000 sq ft +/- Stressgard ® fungicide
Proxy 5 fl. oz./1000 sq ft +/- Stressgard fungicide
Proxy 5 fl. oz./1000 sq ft +/- Stressgard fungicide
First spring application: Always more effective to be early than late on spring applications. • Boot stage of annual bluegrass seedhead • Forsythia bloom • 150-200 GDD32 starting Jan 1 or since the fall application on areas that don't go dormant • 50 GDD50 starting Feb 1st
Proxy 5 fl. oz./1000 sq ft +/- Stressgard fungicide (no Primo)
Proxy 5 fl. oz./1000 sq ft +/- Stressgard fungicide (no Primo)
Proxy 5 fl. oz./1000 sq ft +/- Stressgard fungicide (no Primo ® )
Proxy 5 fl. oz./1000 sq ft + Primo 0.125 fl oz./1000 sq ft or Anuew ® EZ 0.05 - 0.1 oz/1000 sq ft
Proxy 5 fl. oz./1000 sq ft + Primo 0.125 fl oz./1000 sq ft or Anuew EZ 0.05 - 0.1 oz/1000 sq ft Proxy 5 fl. oz./1000 sq ft + Primo 0.125 fl oz./1000 sq ft or Anuew EZ 0.05 - 0.1 oz/1000 sq ft
Second spring application: 3-4 weeks later or 200 GDD32
Third spring application: 3-4 weeks later or 200 GDD32
Proxy 5 fl. oz./1000 sq ft + Primo 0.063 fl oz./1000 sq ft or Anuew EZ 0.025 - 0.05 oz/1000 sq ft
Every two weeks after the first spring application until seedheads end or yearly max is reached (reserve 5 oz/1000 for fall)
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June 2026
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