Brown spots on basil leaves
Have some basil seedlings and some of them are developing leaves mottled with black/brown specs. Any ideas? Basil is being grown outdoors in New Zealand.
Certified GKH Gardening Expert
I believe this to be the Downy Mildew pathogen on your young seedlings.
Your young seedlings can be infected by having infected seeds.
You will need to destroy the plants.
Here are some links to help you.