One of these, pelargonic acid (Scythe, DowAgroSciences) was especially effective for treatment of Nostoc in OSU field trials. During periods of active growth in early summer, pelargonic acid killed Nostoc and prevented its regrowth under irrigated conditions for several weeks.

What can you use to kill Nostoc?

One of these, pelargonic acid (Scythe, DowAgroSciences) was especially effective for treatment of Nostoc in OSU field trials. During periods of active growth in early summer, pelargonic acid killed Nostoc and prevented its regrowth under irrigated conditions for several weeks.

How do I get rid of colonies of Nostoc?

Although Nostoc is not technically a type of algae, herbicides labeled for moss and algae are often the most effective at killing Nostoc. It is best to apply the herbicide when the lawn is dry. Be careful to follow the directions carefully to avoid damaging the surrounding turfgrass.