have a mature, trimmed photinia plant that has suddenly (over the
last two weeks) started going very limp. It looks to be dying. All
the leaves are hanging down and slowly going brown. There does not
appear to be any sign of pests. We have tried giving it lots of
water but it hasn't made any difference. Other plants near it seem
fine... and other photinias in the district appear to be healthy.
Unless it makes a remarkable recovery I think we have lost it. Do
you have any idea what may have caused the problem, or any suggestions
on how we might rescue a previously flourishing plant?
sounds like a root disorder (likely to be Phytopthora). There is
nothing that can be done for the tree; it will have to be removed.
Often after a dry period then a wet spell, root-rot sets in. When
plants wilt, the first thing we do is water it. If it hasn't perked
up, then it is definitely a root disorder.
Photinias are of the
roseacea family which are susceptible to Fire Blight, which is characterised
by branches blackening and dying back (as opposed to wilting in
this case). Infected branches can be cut back and prunings burnt
to prevent the disease spreading. Spray with copper oxychloride.
However, in this case
it doesn't sound like Fire Blight, it sounds like Phytopthora.
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