Answer:

Delta Dust Insecticide is not labeled for gypsy moth caterpillars and should only be used as a crack and crevice application using a bellow hand duster around exterior and interior windows, doors, gaps/cracks in siding, around where utilities come into the home. This would not be used out in open areas.
 
Talstar P would be a better choice to spray on the branches, foliage, trunk and around the base of the tree under the canopy. Talstar P can also be applied to lawns, ornamental shrubs, bushes, trees, flowers as well as to the exterior foundation of the home.  For Gypsy Moth Caterpillars, apply at the rate of 0.125 - 0.25 fl oz per gallon of water. Please review the full product label for more information. 

Answer last updated on: 06/05/2024