What’s bugging my citrus?
Summer is peak time for citrus pests and one of the top pests are scale. Scale can be hard to spot but noticing ants active on the trunk and branches of the citrus, along with sooty mould, a black, crusty growth that covers the leaves, are signs that scale is present. Scale can be flat or slightly rounded and may be black, brown, red or white.
To treat, remove the scale by hand (wear gloves) or use EarthCare White Oil insect spray. Scale on fruit (may be seen on oranges, can just be wiped off the fruit before it is eaten).
Also control ants as they farm scale by moving it around the plant and keep natural predators away. Ants can be controlled by banding the tree’s trunk with a sticky barrier. To keep ants out of pots, stand the container on pot feet and place the ‘feet’ in water.