have new Ready Lawn down and with the warm, wet weather we are having
in Tauranga patches in our lawn display purple/grey crystal-like
formations on the grass which turn black overnight. Prior to this
the lawn was very green and healthy and has been well fertilised
with Yates lawn fertiliser and also watered with Thrive earlier
in the year. I have sprayed the lawn with Yates Greenguard but the
problem is still visible.
lawn has a fungal disease which has proliferated because of the
warm, humid weather we have experienced recently. This can be controlled
by spraying with Fungus Fighter or Bravo. Repeat spray every 14
days to make sure you control the fungal disease. You will find,
as the weather cools, it will be less prevalent.
Reduce the amount of
fertiliser applied to the lawn, especially in winter. Fertilisers
high in nitrogen cause fast growth which will be soft and more likely
to result in fungal diseases in warm, humid conditions. Reduce watering
at this time of the year, and adjust according to the weather.
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