WHAT is this?

[LycheeLust]

Black star seedling and jaboticaba seedling.

What is happening to the leaves? Could this be caused by getting water on the leaves+sun?

[Nyuu]

The black star have Cercospora eugeniae a type is fungus but plant is so small I would afraid of treating it because some chemicals may kill your tree
Jaboticaba look like have interveinal chlorosis usually cause the lack of micro-nutrients

[LycheeLust]

The black star have Cercospora eugeniae a type is fungus but plant is so small I would afraid of treating it because some chemicals may kill your tree
Jaboticaba look like have interveinal chlorosis usually cause the lack of micro-nutrients

I think it’s cause my greenhouse is very high humidity. Should I take it out of the greenhouse?

[Nyuu]

Yeah I would take it out somewhere dryer and try peroxide 1 tsp per cup water

[LycheeLust]

Yeah I would take it out somewhere dryer and try peroxide 1 tsp per cup water

are you sure it’s a fungus? It doesn’t come off when I rub it

[Nyuu]

Yeah I would take it out somewhere dryer and try peroxide 1 tsp per cup water

are you sure it’s a fungus? It doesn’t come off when I rub it

that fungus damaged the tissue of the plant so rubbing it won't remove it . treating it it's only going to prevent the new leaves from getting the fungus

[Nyuu]

Phyllosticta eugeniae it's another fungus might do similar damaged to Cercospora eugeniae