HI, We have have areas in our yard where we seems have or have had grubs. We do not want to get our entire lawn treated for this, we just want to do an application of Grub EX ourselves on the areas that look bad. Can you tell me what time of year we should do this for our area - northern Baltimore county zip 21120 Parkton,MD? The product web site says late spring to early summer, but we wanted to check for our specific area. Thank you,
Baltimore County Maryland
Make sure you have a grub problem. Reasons include past history of grubs, if you have a sprinkler system that keeps the soil moist for egg laying, and if we have weather conditions like wet summers and lush lawns while the adult beetles are active in June. The turf can be rolled back from the soil like a rug this is usually in late summer to early fall. Look for grubs in the upper soil surface, you may need to dig with a trowel. If the grub count exceeds 6-8 per square foot, you may want to consider treating for grubs.
In general, adult egg laying begins in July and root feeding begins in August. Grub controls are applied as a preventative (time frame is mid June through August). Look for a season long grub control that contains the active ingredient Chlorantraniliprole. This product is more environmentally friendly. See our publication on japanese beetles for more information