Sod Webworms, Grubs, and Beneficial Nematodes?
Hello all, sorry this is long but I want to be thorough! :)
So last year we had sod put in and then midsummer it started to thin out in some areas, get patchy, and dozens of white moths would fly up when you walked through it. My understanding is that these were the adult form of Sod Webworms, and that it was their larva which we're doing the damage, and not the adults. Anyhow, hubby threw down some Scott's summerguard at the time and I couldn't stop him, seeing as to how I was busy with a newborn and lawn care was on the back burner for a while. :)
This year, I'd really like to be more proactive about avoiding grub damage and hopefully helping the lawn recover. We have some sort of tall fescue (it was a 90/10 mix of some kind) and these are the practices we've adopted so far:
Last Year: no fertilizer since it was new sod, mowing at the highest setting every 5-7 days, watering 1" as needed depending on weather. We did not overseed though I wish we had since the grubs left the lawn pretty patchy in some areas.
This year: spring is here VERY early (Sacramento) so we started on the fertilizing regimen and have already put down the first round of alfalfa pellets and I plan to feed very month with either alfalfa pellets, SBM, or CGM. I Also put down the preemergent "Amaze" which I do not plan to do every year, but just until the lawn is more established and since we have patchy areas and didn't reseed, so hopefully it will keep the crabgrass etc out for now. I put these down within a few days of one another which I hope is okay! We are having some spring rains (FINALLY!) and to my understanding this is the time when pre-emergent should be applied and when feeding should start.
Now to the Nematodes... I was looking at Guardian/Lawn Patrol and the information sheet says to apply them when you are having spring rains, on a cloudy day, and that they will survive 60-90 days looking for a host. So is this the time to apply these little guys also? I keep reading that timing is CRUCIAL but when exactly that timing is remains a mystery to me. Should I apply now and again at some other time this year? Should I be checking for grubs and only then applying? Im so confused and I really need some advice!