I have one single columbine that has a pretty bad case of leaf miners. I
know usually you can just pick off the infested leaves and discard. But my
whole plant is taken over. I'm afraid if I don't take some action soon it
will kill my plant. Would insecticidal soap do the trick? Is there any way
of getting rid of these little things? Any suggestions would be
Its too late to do treat the infested leaves. You can cut the plant off to
the ground and dispose of the leaves. New leaves will appear. I usually
see some leaf miner damage after the plants flower. This year it stared
very early and the plants are quite heavily infested.
we dont do anything for the columbine, but when they went for the river birch we
out systemic insecticide and it took 2 years but wiped em out. Ingrid
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Unfortunately, columbine leaf miners are not affected by insecticidal soaps
as they reside INSIDE the leaves and are untouched by spraying. I have yet
to see them kill a plant, though. This spring, the miners haven't been a
problem but columbine cutworms have - pretty odd to see all these blooming
columbines with nothing but skeletonized foliage to offset them. Just cut
off the affected foliage - new leaves will be produced almost immediately
and should develop past the normal life cycle of the miners.
pam - gardengal
Hi Pam, thanks for the info re: columbine cutworms - I have several plants
which literally lost the majority of their foliage in ONE NIGHT. You're
correct however. The plants are sending up new foliage from the base. Do
you think our heat wave of March and April accelerated the growth of these
buggers? (I long for the heat and sunshine now - it's been cloudy and rainy
for nearly 2 weeks now, and today is FREEZING).
Never seen a leaf miner infestation kill columbines yet.
I'd imagine you would need to use a systemic unless you were able to
time the emergence of the adult leaf miners but like I said I never
seen a plant taken down by them.
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