curl on peach tree
have an awesome golden queen peach tree with leaf curl. We sprayed
it with copper last year and managed to get a tree of fruit but
not in abundance like the previous fruiting season. We have been
told that you should wait until half the leaves fall from the tree
and then spray again with copper. Another option we have been told
is to insert copper nails into the base of the trunk!
lack of fruit on your golden queen is likely to have more to do
with the weather conditions at the time of flowering and pollination
than leaf curl. If spring was very wet, then pollination will have
been poor, or late frosts will affect fruit set. Annual feeding
with a general garden fertiliser is beneficial to promote good flowering
Leaf curl is a common
disease of peaches and nectarines. Your tree will need regular spraying
with Copper Oxychloride if you are to keep the disease at bay. Spray
soon after pruning in winter, just before the tree comes into leaf
in spring and again 10-14 days later. The disease overwinters in
buds and is common in cool wet weather in spring. Rake up fallen
leaves and burn or put into the rubbish.
Copper Oxychloride is
a protectant spray, Bravo or Greenguard can be used if the infestation
is particularly heavy.
There are peach varieties
that are resistant to leaf curl; your local garden centre can tell
you which ones are best for your area.
I have heard of copper
nails being inserted into the trunk, but as far as I know, this
has not been scientifically proven to be an effective method of
controlling leaf curl.
You may find with a favourable
spring you will have a bumper crop next season.
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