It proved very easy to germinate and keep my Mimosa tenuiflora young plants alive, despite of the relatively cold weather. I had to autoclave the soil prior as the first batch suffered seedling root rot/damping off regardless of me not watering them in excess. Did some research and learnt it's a soil-borne fungus causing it so I soaked the seeds in bleach solution prior to hot water scarification and planted them in autoclave sterilised soil.
Two months later I see some of the cotyledons and bottom leaves getting a brownish spotting and some black dots only visible by magnifying it with my extremely shitty mobile phone. Would you people say those are some type of mite? What control measures should I undertake?