Thank you for writing! The timing of putting out Insect control depends on several things:
1) What are you targeting?
2)What Product are you using?
If your goal is to stop the grubs in the fall, May is the best time. However, to last until the fall, you have to use a product that is capable of doing that. The most common one on the market and the one we use is Imidacloprid or Merit. This information can be found on the label of any product you buy and is usually on the front of the bottle. At the proper rates this will last up to 6 months and works great.
One thing to keep in mind is, if your goal is to get rid of moles, this will only give minimal relief since they also eat earthworms. With our Grub program we also add a curative treatment in the fall to ensure we don’t get damage from a late hatch, or to ensure a surface feeding insect like armyworms don’t sneak up on you. For this we use a different product which contains Bifenthrin or Sevin.
I hope this helps and feel free to write us anytime!
Name: Ed C.
Question for the Commander: When do I apply grub control to my lawn? It is now May in NC, is it too late now?