I understand how to kill digger wasps for the nests that I can see, but it appears that they are also in my juniper grass. How do I kill them without seeing the nests and without killing the juniper?
Any of the products we have listed in our DIGGER WASP ARTICLE can be used safely on grass, plants, etc. In case you don’t know, the term “pesticide” represents a wide range of products which in fact can be applied to treat many things. For example, fungicides are used to treat plant fungus. Herbicides are used to treat weeds. Insecticides are used to control insects. These are all lumped into the category known as “pesticide”. But just because they’re all pesticides it does not mean that a fungicide can kill an insect. In fact most can’t. Conversely, insecticides can’t kill plants.
In fact, most all insecticides can be applied over plants without undue harm. So in this situation, if you were to broadcast the CYFLUTHRIN GRANULES and then spray over the top with the ESFENVALERATE, you’d soon have control of the digger wasps without ever having to know where they live.
Here are direct links to the products and information listed above:
Digger Wasp Control: http://www.bugspray.com/articles99/diggerwasps.html
Cyfluthrin Granules: http://www.bugspraycart.com/insecticide/granule/cyfluthrin-granules