Dimilin® 25W

Insect Growth Regulator

Dimilin 25W Insect Growth Regulator (IGR) offers control of a variety of insect pests found on trees and shrubs grown in public and private forests, forest plantings and forest nurseries, and Christmas tree and conifer nurseries. Dimilin 25W can be used in repeat applications at weekly intervals. Do not use more than two (2) Dimilin 25W applications per season.


Mushroom Production: Dimilin 25W will control larvae of sciarid flies in mushroom growing facilities.


Spongy moth: For use in Quarantine programs conducted by State cooperators as well as USDA personnel of both Plant Protection and Quarantine, APHIS, and the U.S. Forest Service. Make two applications of 1-2 oz. per acre at 7-14 day intervals.


Bagworms: Apply to early instars in mid to late June.


Dimilin 25W - Insect Growth Regulator

Labeled for use on:

Trees, shrubs, ornamentals, mushrooms, peppers, and non-crop areas.


Insects controlled:

Armyworms, bagworms, browntail moth, budworms, cankerworms, spongy moths, hemlock loopers, lepidopterous leafminers, pine shoot moth, pine tip moths, sawflies, tent caterpillars, tussock moths, webworms, weevils, and Zimmerman moth.



5 lbs. bag, 8 per case.



Dimilin 25W is a restricted use pesticide and should be used only by certified applicators or persons under their direct supervision.

  • EPA Registration Number70506-526-59807
  • Restricted Entry Interval (REI)12 hours
  • Chemical FamilyBenzoyl Urea IGR
  • MOA15
  • Active IngredientDiflubenzuron
  • Rate per 100 gallons2 to 8 ounces
  • Rate per 1 gallonN/A
  • ApplicationSpray or drench