have a white clematis climber that is being killed. The main stems
are dying they are getting covered with long lines of brown,
small, saw teeth like disease. This same problem also killed my
the damage on your clematis in a herringbone pattern? This is caused
by female cicadas laying eggs in stems and branches. The eggs hatch
into nymphs and drop to the ground where they live in the soil until
conditions are favourable to hatch into adults. Damage can become
so severe that shoots become weakened and break off or die back.
It is hard to control
cicadas chemically, but you can encourage birds to your garden as
they feed on adult cicadas and some soil-living beetles feed on
Some plants are more
attractive to female cicadas your kaka beak is one. Avoid
replanting these plants; look at alternatives.
Cut back the dead growth
and your clematis will come away in spring.
Clematis enjoy a cool,
moist root run and their heads in the sun. There are several things
that can be done to optimise growing conditions. Mulch around your
clematis in spring and autumn, or place a large rock or rocks around
the base of the plant to help retain soil moisture and insulate
the roots from summer heat.
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