Yes you can disable or enable replies to your topics/updates. When you are creating a new topic, you will be able to see the ‘Replies Status’ at the end of the form. Just enable/disable the ticker.
Go to your Group and click ‘Add Discussion +’ button.
Fill-out the form.
At the end of the form, you will be able to see the ‘Replies Status’.
Enable/disable the ticker.
If you already posted a topic/update, just ‘Edit’ your topic and go to the end of the form.