and jasmine are attacking my natives
have a small established area of native plants (an old bush house)
in my garden, which have come under serious attack from ivy and
jasmine. Included in the area are mature pittosporums, titoki, wineberry
and a nikau palm. Also ponga, which are the main victims of the
ivy at the moment.
I read the War
on Weeds articles on these two weeds with great interest and
wonder what precautions I could take to protect these plants, particularly
the nikau and trees, if I was to take the chemical control path
assuming there is anything I can do to protect them. I think
the ponga will probably be lost, they are so badly covered, but
the nikau is still clean and I particularly don't want to damage
it or the other trees.
asked Reg Lewthwaite, horticulture lecturer and expert in sprays,
for his advice. Reg suggested that for a small area the first thing
to do is to physically remove all the weeds that you can. This will
minimise the use of chemicals and also let you separate the weeds
from the native plants. Make sure you remove any small stems and
fragments as they will grow into new plants.
For a long-term solution
you can establish selected plants that provide dense shade, which
will suppress weeds.
Then, if you need to,
you can use an agrichemical to get the little bits that remain behind
and regrow as soon as you turn your back. Reg suggested trying out
'Vigilant' which comes in a small container and can be wiped onto
the cut stems. It can affect the soil and desirable plants, so use
as little as is needed to cover the cut.
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