J-i use a sulphur burner. if thats not working and the mold is on the bud itself-i have used serenade. its all-organic and it says you can spray up to day of harvest. this stuff will give you about 5-7 days until it makes a comeback. i hate spraying buds, but anything is better than powder mold. i get it at my local grow store and the local nursuries also carry it.