With a cold wet winter we have had this year it has been particularly difficult managing the issue of invading wintergrass in our greens.
A certain level of wintergrass infestation remains in our greens all year round as many genotypes actually become perennial, meaning they last through the years, and not annual as is the typical cycle.
As weather conditions change to the wet, cooler months the desired species of bentgrass slows its growth and this highlights the presence and competitive ability of the wintergrass.
We are currently using to chemicals to help control the development of wintergrass, one being a growth retardant to restrict its development and the other being a contraceptive to restrict its flowering and in turn its ability to produce more seed.
The use of these chemicals affects the colour of the wintergrass and makes it more obvious visually. The 2nd green is a typical example of how the individual plants can be highlighted.
We have also been trialing a fertiliser and growth retardant combination product on the 10th green this year with encouraging results.
Though we have not eliminated the wintergrass totally in this green, its general health and condition has been a lot better this year as compared to previous years.
We are therefore considering the use of this programme on all greens next winter.
The 2nd green with the discoloured wintergrass (light green) plants after chemical treatment.
