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Gardening Q&A  Published Saturday, June 19, 2004  Q. My
poinsettia leaves are getting more red. Is this normal?  A. New
leaves emerge tinted red. If light levels are quite high they
will stay reddish. The red helps to block out sunlight so this
is a way to regulate how much sun is being absorbed by the leaf.
Q. I have a 2-foot avocado on which I noticed a fly on its
leaves. Now a new leaf has a hole eaten into it. What can I do
to control it?  A. The fly most likely did not cause the leaf
hole. At night, inspect the plant for a caterpillar or snail or
slug. If noticed, simply remove the pest and destroy it.  Q. A
white mist is on the stem and leaf backs of my grape vine. What
is it and how can I rid my plant of it?  A. Your problem sounds
like a sucking insect, akin to scale or mealy bugs. A mild
control would be soap or oil spray. You can use a stronger spray
like malathion which should require less spraying.  Q. Some of
the leaves on my daylily are y