tree with leaf spot
bought a Quince tree several months ago. It had a blight on its
leaves at the garden centre and this has continued after planting.
It seems to be a typical feature of these trees as I see the neighbour
has one which also contains this blight. The blight is very damaging
to new leaves and I find the tree is struggling to grow new foliage.
I give it adequate water, so I am wondering what spray is best,
if any, to rid the tree of this condition.
trees (Cydonia oblonga) provide wonderful fragrant fruits
used in cooking, but the trees themselves are also rather unique
and attractive. Quinces are not quite as hardy as other members
of the rose family, such as apples and pears, but can be grown in
colder areas if protected from the severest frosts.
Quinces are very susceptible
to leaf spot diseases if planted in warm humid areas and are especially
vulnerable in places with humid summers. From your letter it does
sound like this is your problem and there are a number of things
you could try.
Firstly, I suggest you
look at where your tree is growing. You need to make sure that there
is plenty of air movement around the tree, and that it isn't being
permanently shaded by other trees or buildings. When you water the
tree, don't water the foliage, as this will only encourage fungi
to grow. Remove any twigs or fallen leaves from around the base
of the tree; this will reduce the amount of fungal spores in the
If the leaf spot disease
is still a major problem, look for a fungicide spray for ornamentals
at your local garden centre. Avoid spraying when the tree is in
flower or near the time the fruit is ripe; you don't want to kill
either the bees or the eaters of the fruit! Good luck.
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