Transition Zone
White Grubs, Annual Bluegrass Weevils, Billbugs, and Caterpillars Envu’s newest insecticide, Tetrino ® , offers quick knockdown and long-term residual control of larvae of annual bluegrass weevils, annual white grubs, and billbugs as well as damaging caterpillars like black cutworms and fall armyworms. The broad-spectrum activity and flexibility of Tetrino is perfect for any golf course insect management program.
Target
Timing
Target Life Stage
Product
Notes
Late April-early June (between full bloom of Dogwood and Catawba Rhododendron)
1st generation larvae in L1-L5 stage
Tetrino 2,4 32 fl. oz./A
Most important application for ABW control.
Annual Bluegrass
Extends control of ABW plus provides season-long control of white grubs and caterpillars. Tetrino rotated with Merit ® and/or Dylox ® in a season-long program can be an effective strategy against high density populations of ABW and helps combat insecticide resistance.
Weevil (ABW)
2nd generation larvae in L1-L5 stage
Late June through late July
Tetrino 2,4 32 fl. oz./A
Tetrino 2 16-32 fl. oz./A or Merit 3 0.4 lbs. ai./A (multiple formulations available including on fertilizer)
Water in with 0.125-0.5” for most effective control. Refer to label of specific product for instructions. Sequential applications likely required if white grubs are also problematic
When adult beetles of billbugs are seen (usually May 1st - June 15th)
Billbugs
Larvae
An application of Tetrino applied in mid-July for white grubs will also provide season long control of fall armyworms. Water in with 0.125-0.5” for most effective control. Refer to label of specific product for instructions Delay watering and mowing for 24 hours after application. Provides immediate knockdown plus residual control for up to 10 weeks depending on rate. An application of Tetrino applied in mid-July for white grubs will also provide season long control of fall armyworms.
Tetrino ®2 32 fl. oz./A or Merit ®3 0.4 lbs. ai./A (multiple formulations available)
Apply during peak adult (usually July-August).
White Grubs 1
Larvae
When adults are first seen
Caterpillars
Larvae
Tetrino 2 16-32 fl. oz./A
1 The Envu Preventative White Grub Control Program will give you confidence in your white grub control through Fall 2024. If your Envu Preventative White Grub Control Program performance expectations are not met, just contact your Envu Distributor or Envu Area Sales Manager. 2 Apply no more than 64 fl. oz./A/yr of Tetrino. 3 Apply no more than 0.4 lbs. ai./A/yr of imidacloprid, regardless of formulation.
White grubs are best controlled with Tetrino ® or Merit ® applied when adult beetles are first seen in mid-summer. (Envu)
Preventative white grub control will help eliminate damage from animal foraging. (Envu)
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