Don’s Expert Answers: Black soot on mandarine treet

Question From:
in Bonnie Doon, Vic Victoria

Nature of problem:
Black soot on mandarine treet

Type of Plant (if known):

Symptoms of Plant Illness (please try NOT to diagnose your problems yourself):
covered in black stuff

Soil Type (e.g. sandy, clay or loam) OR Potting Mix Type:
on rock base, normal soil

How often do you water the plant:
depends on weather, once a week if no rain has fallen

How many hours of sunlight does the plant get each day:
all day

How long since you planted it:
10 years

Have you fertilised? If so, with what and when:
yes seasol

Is the plant indoors or outdoors:

Is the plant in a pot or in the ground:

What other treatments have you given the plant:
white oil

Upload photo if available:

Other Comments:

Hi Lesley, Your citrus tree has either aphids or scale. Spray with Eco Oil as per instructions on the container and repeat it in late November. this is a harmless oil safe for you & the environment. Don