Re: Holes in rhizomes
Julie--Do you have crickets? I'm not sure, exactly, what your holes look
like. When you said "hole" I pictured a sharp-edged, straight sided hole
like a nail would make. From your description, however, I wondered if it
isn't the same thing I get this time of year that looks as if something
is just gnawing away at the exposed top part of the rhizome?
I have determined it's crickets. If they find a rhizome that tastes
particularly good to them they will eat the entire thing and I find the
fan flat on the ground, completely detatched, since the rhizome is gone.
Lost several guest iris this way a couple of years ago. In an established
clump it doesn't seem to hurt much--if they eat one rhizome there are
usually more there. But for some reason they seem to prefer the newly
planted rhizomes were I only have one rhizome to start with.
Now when I plant, the last thing I do is sprinkle a few diazanon crystals
around the exposed rhizomes. Doesn't always complete stop the gnawing,
but seems to get rid of the crickets before they can completely finish off
Lois Rose in Central Virginia
25 mi SW of Fredericksburg in southern Spotsylvania County
Zone 7; peak TB bloom May 15