I tried nematodes to no avail. The only thing (unfortunately) that seems
to work is to apply nasty systemic insecticides when the first notches
are noticed. Here the damage is on epimedium (fresh young leaves), H.
'Honeybells' and H. plantaginea, and anything with a bright
green spring color, like the young leaves of the redbud tree (Cercis
canadensis). They seem to leave dark green alone. I only spot treat
because the nonsocial, solitary leaf cutter bees are realy good bees. The
damage occurs only during a certain period in early spring, here in late April
and into mid-May, when the bees are lining their new nests with the leaf
cutouts. Apparently, the systemic gets carried into the nests and works there.
More in my book page 374.
----- Original Message -----
Sent: Monday, June 17, 2002 10:09
Subject: Re: cutworms on hostas?
Hello Dr. Grewal,
Do these nematodes work on carpenter bees also?
Would the adult bee take the nematodes into the wood and infect the bee
larva also? I have carpenter bees rather badly here in Georgia.
Dan & Lu