have two Eucalyptus ficifolia (8 yrs old) that have been
bleeding red gum. The first one started bleeding about two years
ago, particularly around the lower trunk. It appeared to stop its
growth. There was none of the usual spring growth, and appeared
that the leaves had dulled down. The bleeding now seems to have
stopped and there is more leaf growth. Now a second ficifolia has
started bleeding around the lower trunk and growth appears to have
stopped even though it is the growing season. What is the matter
is quite common in Eucalyptus trees and is known as 'kino'
a reddish brown gummy substance that is formed by Eucalyptus species
due to injury (insect, fungi, mechanical or fire). Some chemical
sprays and animal urine are also known to stimulate kino.
This ooze is part of
the tree's defence mechanism and prevents fungus diseases entering
the tree where there is an open wound. In periods of drought, trees
do not produce the ooze as much as they do in periods of high rainfall.
You do not need to do
anything about your tree bleeding. Typically trees will have a growth
spurt in spring and again in autumn; in the hotter months growth
by Dr Dan Blanchon from Unitec's Diploma in Sustainable Horticulture and Bachelor
of Resource Management.
with permission from NZOOM Home and Garden content,
from the previous
The views expressed here are not necessarily those of the RNZIH